4140 Q&t

Transcript

 Alro delivers...ev delivers...everyday  eryday   Alloys ETD 150® ........... ....................... ........................ ........................ ........................ ........................ ........................ ...............8-2 ...8-2 ETD 150® Rounds ............ ........................ ....................... ....................... ........................ ........................ ..............8-2 ..8-2  AISI 4140/41L40 - Annealed ........... ....................... ........................ ........................ ......................8-3 ..........8-3  AISI 4140 - Annealed Flats And Squares ............ ....................... ........... 8-4 thru 8-5  AISI 4140 - Annealed Rounds ............ ........................ ........................ ................ .... 8-5 thru 8-6  AISI 4140 HR Q&T........ Q&T.................... ........................ ........................ ........................ ........................ ................8-7 ....8-7  AISI 4140 Rounds HR Q&T ............ ........................ ........................ ........................ ......................8-7 ..........8-7  AISI 4140 and 41L40* Annealed CF Rounds ........... ....................... ...................8-8 .......8-8  AISI 4140/4142 CF Q&T Q&T ........... ....................... ........................ ........................ ........................ ................8-8 ....8-8  AISI 4140 Q&T TG&P ........... ....................... ........................ ........................ ........................ ....................8-9 ........8-9  AISI 4140 Annealed CF Squares............ ....................... ....................... ........................ ...............8-9 ...8-9  AISI 4140 Annealed CF Hexagons Hexagons .......... ...................... ........................ ........................ .............8-9 .8-9  AISI 4140 Annealed CF Flats ........... ....................... ........................ ........................ ..................8-10 ......8-10  AISI 4140/4142 - (MOD) (MOD) ........... ....................... ........................ ........................ ........................ .............. .. 8-1 8-11 1  AISI 4140/4142 - (MOD) Flats And Squares............... Squares............... 8-12 8-12 thru  thru 8-14  AISI 4140 - As Rolled Plate ............ ........................ ........................ ........................ ....................8-15 ........8-15  AISI 4150 Hot Rolled Annealed ............ ........................ ....................... ....................... ...............8-16 ...8-16  AISI 4150 Hot Rolled Annealed Rounds............ ........................ ........................ .............8-16 .8-16  AISI 4150R Q&T Q&T SR ........... ....................... ........................ ........................ ........................ ....................8-17 ........8-17  AISI 4150R Q&T Q&T SR Rounds Rounds............ ........................ ........................ ........................ ..................8-18 ......8-18 4150 DYBAR - (MOD) RS .......................... ...................................... ........................ ....................8-19 ........8-19 4150 DYBAR - (MOD) RS Flats............ Flats ........................ ....................... ....................... ...............8-19 ...8-19  AISI 4340 - Annealed Q&T ........... ....................... ........................ ........................ ......................8-20 ..........8-20  AISI 4340 - Annealed Rounds ............ ........................ ........................ ....................... ................8-21 .....8-21  AISI 4340 - HR Q&T Rounds............ ........................ ........................ ....................... ..................8-21 .......8-21  AISI 6150 - Annealed .......... ...................... ........................ ........................ ........................ ....................8-22 ........8-22  AISI 6150 - Annealed Flats And Squares ............ ................... ....... 8-23 thru 8-24  AISI 6150 - Annealed Rounds ............ ........................ ........................ ....................... ................8-25 .....8-25  AISI 8620/86L20 ............ ........................ ........................ ....................... ....................... ........................ ..............8-26 ..8-26  AISI 8620 Flats And Squares ................. ............................. .................... ........ 8-27  thru 8-28  AISI 8620 HR Rounds ............ ........................ ........................ ........................ ........................ ................8-29 ....8-29  AISI 8620 CF Rounds ........... ....................... ........................ ........................ ........................ ..................8-29 ......8-29  AISI 86L20 CF Rounds ........... ....................... ........................ ........................ ........................ ................8-30 ....8-30  AISI 8620 Plate............ ........................ ........................ ........................ ....................... ....................... ................8-30 ....8-30  AISI 52100 ........... ....................... ........................ ........................ ........................ ........................ .......................8-30 ...........8-30  AISI 52100 Rounds............ Rounds........................ ....................... ....................... ........................ ......................8-31 ..........8-31  Alro Brake Die.............. Die.......................... ........................ ........................ ........................ ........................ ...............8-32 ...8-32 KPM SUPER SQUARE ............ SQUARE  ........................ ........................ ........................ ........................ ..............8-33 ..8-33 TOLERANCES Hot Rolled Alloy Bars ................................ ............................................ ........................ ..............8-34 ..8-34 Size Tolerances - Rounds ...................................................8-34 DCF Thickness and Width .............................. .......................................... ....................8-34 ........8-34 Thickness Tolerances - 4140 HRA and 8620 HR Flats .......8-35 Standard Manufacturing Cold Finished Bars ......................8-35 ......................8-35 8-1  Alro delivers...ev delivers...ever eryday  yday  ETD 150 ®  E.T.D. 150 ®  stands for Elevated Temperature Drawing process. This eliminates heat treating and secondary operations such as straightening, nish grinding, cleaning and inspections. It can be roll threaded, knurled, and plated. ETD 150 ®  .40 Min .70/1.10 .15/.35 .80/1.20 .15/.25 TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Chromium (Cr) Molybdenum (Mo) MECHANICAL PROPERTIES  Tensile Strength ................ .................................. .................................... ............................... ............. **150,000 psi Min Yield Strength (.2% offset) ................ .................................. .................................... .................... 130,000psi Min Elongation   ..................................................................................10% (Mean) Elongation Reduction of Area .......................................................................37% (Mean) Machinability .................. .................................... .................................... .................................... ........................ ...... 75% of 1212 Rockwell C Hardness .......................................................................**32 Min Brinell Hardness .............................................................................**302 Min *ETD 150® contains additives for improving machinability. These may be Tellurium, Selenium, Sulphur (.06 max), or others, separately or in combination. **In the event of disagreement between hardness and tensile strength, the tensile strength shall govern. ETD 150 ®  ROUNDS  Size in Inches Pounds Pounds per ft per 12 ft 1/2 0.670 8.04 9/16 0.850 10.20 5/8 1.040 11/16 Size in Inches 1-7/8 Pounds Pounds per ft per 12 ft 9.390 112.68 2 10.680 128.16 12.48 2-1/8 12.06 144.72 1.260 15.12 2-1/4 13.52 162.24 3/4 1.500 18.00 2-3/8 15.06 180.72 13/16 1.760 21.12 2-1/2 16.69 200.28 7/8 2.040 24.48 2-5/8 18.40 220.80 1 2.670 32.04 2-3/4 20.19 242.28 1-1/16 3.014 36.17 2-7/8 22.07 264.84 1-1/8 3.379 40.55 3 24.03 288.36 1-3/16 3.770 45.24 3-1/4 28.21 338.52 1-1/4 4.170 50.04 3-3/8 30.42 365.04 1-3/8 5.050 60.60 3-1/2 32.71 392.49 1-1/2 6.010 72.12 1-5/8 7.050 84.60 1-3/4 8.170 98.04 Visit the Alro Web Site www.alro.com alro.com 8-2 alro.com  Alro delivers...ev delivers...ever eryday  yday  ETD 150 ®  E.T.D. 150 ®  stands for Elevated Temperature Drawing process. This eliminates heat treating and secondary operations such as straightening, nish grinding, cleaning and inspections. It can be roll threaded, knurled, and plated. ETD 150 ®  .40 Min .70/1.10 .15/.35 .80/1.20 .15/.25 TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Chromium (Cr) Molybdenum (Mo) MECHANICAL PROPERTIES  Tensile Strength ................ .................................. .................................... ............................... ............. **150,000 psi Min Yield Strength (.2% offset) ................ .................................. .................................... .................... 130,000psi Min Elongation   ..................................................................................10% (Mean) Elongation Reduction of Area .......................................................................37% (Mean) Machinability .................. .................................... .................................... .................................... ........................ ...... 75% of 1212 Rockwell C Hardness .......................................................................**32 Min Brinell Hardness .............................................................................**302 Min *ETD 150® contains additives for improving machinability. These may be Tellurium, Selenium, Sulphur (.06 max), or others, separately or in combination. **In the event of disagreement between hardness and tensile strength, the tensile strength shall govern. ETD 150 ®  ROUNDS  Size in Inches Pounds Pounds per ft per 12 ft 1/2 0.670 8.04 9/16 0.850 10.20 5/8 1.040 11/16 Size in Inches 1-7/8 Pounds Pounds per ft per 12 ft 9.390 112.68 2 10.680 128.16 12.48 2-1/8 12.06 144.72 1.260 15.12 2-1/4 13.52 162.24 3/4 1.500 18.00 2-3/8 15.06 180.72 13/16 1.760 21.12 2-1/2 16.69 200.28 7/8 2.040 24.48 2-5/8 18.40 220.80 1 2.670 32.04 2-3/4 20.19 242.28 1-1/16 3.014 36.17 2-7/8 22.07 264.84 1-1/8 3.379 40.55 3 24.03 288.36 1-3/16 3.770 45.24 3-1/4 28.21 338.52 1-1/4 4.170 50.04 3-3/8 30.42 365.04 1-3/8 5.050 60.60 3-1/2 32.71 392.49 1-1/2 6.010 72.12 1-5/8 7.050 84.60 1-3/4 8.170 98.04 Visit the Alro Web Site www.alro.com alro.com 8-2 alro.com  Alro delivers...ev delivers...everyday  eryday   AISI 4140/41L40 4140/41L40 - ANNEALED  ANNEALED  HR  (ALSO AVAILABLE IN DCF) This medium carbon alloy grade is widely used for many general purpose parts requiring high tensile strength and toughness. 4140 contains chromium and molybdenum as alloying elements and may be heat treated over a wide range to give the combined advantages of proper proper hardness, strength and and ductility. ductility. In conditions where localized hardness may be required, this steel is readily ame or induction hardened. TYPICAL ANAL ANALYSIS YSIS Carbon (C) Manganese (Mn) Silicon (Si) Molybdenum (Mo) Chromium (Cr) Phosphorus (P) Sulphur (S) *Lead AISI 4140/41L40  .38/.43 .75/1.00 .15/.30 .15/.25 .80/1.10 .035 MAX .040 MAX .15/.35 FORGING (a) Start forging at Do not forge below NORMALIZING (b) (871-899º C)  ANNEALING (c) Temperat emperature ure Rate of cooling, max. per hour    Typical annealed hardness, Brinell Typical HARDENING Rate of heating Preheat temperature Hardening temperature Time at temperature, minutes Quenching medium WEAR RESISTANCE TOUGHNESS RESISTANCE TO SOFTENING EFFECT OF ELEVATED TEMPERATURE DEPTH OF HARDENING MACHINABILITY GRINDABILITY DISTORTION IN HEAT TREATING SAFETY IN HARDENING RESISTANCE TO DECARBUR DECARBURIZATION IZATION 2000-2200º F (1100-1200º (1 100-1200º C) 1800º F (980º C) 1600-1650º F 1500-15 50º F 1500-1550º (816-843º C) 212 Slowly 1500-1550º F (816-843º C) 0 (I) Medium Very High Low Medium Medium High Medium Low Medium •Refer to pages 14-24 thru 14-25 for notes (a) to (o), incI., explanation of letter 0, A, S, B and W. *Applies only to 4140 leaded alloy steel bars. Visit the Alro Web Site www.alro.com alro.com alro.com 8-3  Alro delivers...everyday   AISI 4140 - ANNEALED SIZE CHART  FLATS AND SQUARES (Cut From Plate)     Size (inches) 3/8 x 3/8 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 6 1/2 x 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 7 8 10 12 16 20 24 5/8 x 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 Size (inches) Pounds (per ft.) 0.594 0.765 0.935 1.105 1.446 1.786 2.126 2.467 2.807 3.147 3.488 3.827 4.168 4.849 5.530 8.252 1.004 1.227 1.451 1.897 2.344 2.791 3.237 3.684 4.131 4.577 5.024 5.471 6.364 7.257 8.151 9.044 10.831 12.618 14.404 17.978 21.551 28.697 35.844 42.991 1.520 1.796 2.349 2.902 3.455 4.008 4.561 5/8 3/4 1 (ALSO AVAILABLE IN DCF) Pounds Size Pounds (per ft.) (inches) (per ft.) x 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 5.114 5.667 6.220 6.773 7.879 8.985 10.092 11.198 13.410 17.834 22.257 26.682 35.530 44.378 53.227 x 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 2.141 2.801 3.460 4.120 4.779 5.438 6.098 6.757 7.417 8.076 9.395 10.713 12.032 13.351 15.988 21.263 26.538 31.813 42.363 52.913 63.463 x 1 1-1/8 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 3.704 4.141 4.577 5.449 6.321 7.193 8.065 8.937 9.809 10.681 12.425 3/4 1 x 4 4-1/2 5 6 8 10 12 16 20 24 Continued on next page  14.169 15.914 17.658 21.146 28.123 35.099 42.076 56.028 69.981 83.934 1-1/4 x 1-1/4 5.692 1-1/2 6.778 1-3/4 7.862 2 8.947 2-1/4 10.032 2-1/2 11.117 2-3/4 12.201 3 13.286 3-1/2 15.456 4 17.625 4-1/2 19.795 5 21.964 6 26.304 8 34.982 10 43.660 12 52.338 16 69.694 20 87.050 24 104.406 1-1/2 x 1-1/2 8.106 2 10.702 2-1/4 11.999 2-1/2 13.296 2-3/4 14.594 3 15.891 3-1/2 18.486 4 21.081 4-1/2 23.676 5 26.271 6 31.461 8 41.841 10 52.221 12 62.600 16 83.359 20 104.119 24 124.878 1-3/4 x 1-3/4 •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. •Weights above include nominal oversize tolerance. Actual weights may vary. 8-4 HR  10.945  Alro delivers...everyday   AISI 4140 - ANNEALED  SIZE CHART  HR  FLATS AND SQUARES (ALSO AVAILABLE IN DCF) (Cut From Plate)     Size (inches) 1-3/4 x 2 12.456 2-1/2 15.476 3 18.497 4 24.537 4-1/2 27.557 5 30.578 6 36.619 8 48.700 10 60.781 12 72.862 16 97.025 20 121.188 24 145.350 2 x 2 14.210 2-1/4 15.933 2-1/2 17.656 2-3/4 19.379 3 21.102 3-1/2 24.547 4 27.993 4-1/2 31.438 5 34.885 6 41.776 8 55.559 9 62.451 10 69.342 12 83.125 16 110.690 20 138.257 24 165.822 2-1/4 x 2-1/4 2-1/2 Size (inches) Pounds (per ft.) 17.900 19.836 Pounds (per ft.) 2-1/4 x 2-3/4 21.771 3 23.707 3-1/2 27.578 4 31.449 4-1/2 35.320 5 39.191 5-1/2 43.063 6 46.934 8 62.418 10 77.903 12 93.387 16 124.357 20 155.326 24 165.823 2-1/2 x 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 3 x 3 3-1/2 4 4-1/2 Size (inches) 3 22.015 24.164 26.312 30.609 34.905 39.202 43.498 47.795 52.091 69.277 86.464 103.650 138.022 172.394 206.767 x 5 6 8 10 12 16 20 24 Pounds (per ft.) 52.112 62.406 82.996 103.585 124.174 165.353 206.532 247.711 3-1/2 x 3-1/2 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 42.730 48.525 54.523 60.521 66.723 72.518 96.510 120.502 144.495 192.480 240.465 288.451 4 55.408 62.257 69.106 75.955 82.804 110.199 137.595 164.991 219.782 274.574 329.366 31.522 36.670 41.817 46.964 x 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Sizes not listed above can be cut from plate.  AISI 4140 - ANNEALED  ROUNDS SIZE CHART      Diameter  (inches) Pounds (per ft.) 5/8 3/4 7/8 1.044 1.500 2.040 2.676 3.384 4.176 5.052 1 1-1/8 1-1/4 1-3/8 Diameter  (inches) 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 HR  (ALSO AVAILABLE IN DCF) Pounds (per ft.) Diameter  (inches) Pounds (per ft.) 6.012 7.056 8.172 9.384 10.680 12.234 13.704 2-3/8 2-1/2 2-5/8 2-3/4 2-7/8 3 3-1/8 15.258 16.896 18.724 20.533 22.426 24.409 26.463 8-5  Alro delivers...everyday   AISI 4140 - ANNEALED  ROUNDS SIZE CHART      Diameter  (inches) Pounds (per ft.) 3-1/4 3-3/8 3-1/2 3-5/8 3-3/4 4 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 HR  (ALSO AVAILABLE IN DCF) Diameter  (inches) Pounds (per ft.) Diameter  (inches) Pounds (per ft.) 6-3/4 7 7-1/4 7-1/2 7-3/4 8 8-1/4 8-1/2 8-3/4 9 9-1/4 9-1/2 9-3/4 10 10-1/2 11 123.078 133.779 143.397 153.348 163.631 174.251 185.204 197.170 208.818 220.816 233.100 245.741 258.716 273.753 301.458 330.498 11-1/2 12 12-1/2 13 13-1/2 14 14-1/2 15 15-1/2 16 17 18 19 20 360.874 392.584 427.665 462.124 497.918 535.047 573.511 613.310 654.444 696.913 785.856 880.139 979.762 1084.725 28.606 30.833 33.143 35.692 38.175 43.394 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 •Refer to pages 8-34 thru 8-35 for alloy tolerances.  Stock lengths 12' (20' randoms available in most sizes). *Sizes above 12" are 16-20' randoms, forged and roughturned.  Alro Steel  Metals • Indstrial Spplies • Plastics As yor Alro Sales Representative abot or Processing Services • Saw Ctting • Flame Ctting • Prodction/Precision Sawing • Water Jet • Precision Alminm Plate Sawing • Plate Laser  • Press Brae/Forming • Tbe Laser  • Thermal Processing • Shearing • Plasma • Grinding Contact s today and learn more abot The Alro Difference! alro.com 8-6 (888) 888-ALRO 2 5 7 6  Alro delivers...everyday   AISI 4140 Q&T  (HOT ROLLED, QUENCHED AND TEMPERED) 4140 HR Q&T is a general purpose alloy with good hardness penetration, strength, toughness, and ductility. Sizes thru 7" comply with the chemical and mechanical properties of ASTM-A193-B7. Sizes over 7" to 9-1/2" conform to ASTM A434. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Tungsten (W) Molybdenum (Mo) Chromium (Cr) Vanadium (V) Sulphur (S) Phosphorus (P) HEAT TREATMENT Quenched from Tempered at Quenching medium TENSILE STRENGTH YIELD POINTapprox. 85,000 lbs psi BRINELL HARDNESS ROCKWELL C ELONGATlON IN 2" REDUCTION IN AREA AISI 4150  .37/.49 .65/1.10 .15/.30 .15/.25 .75/1.20 .040 MAX .035 MAX 1525ºF (828ºC) MIN 1100ºF (593ºC) MIN O (I) approx. 110,000 lbs psi 269-321 28-32 16% 50% HR Q&T   AISI 4140 ROUNDS    Diameter  (inches) 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 2-7/8 3 Pounds (per ft.) 1.500 2.040 2.670 3.379 4.170 5.048 6.010 7.050 8.180 9.387 10.680 12.234 13.704 15.258 16.896 18.724 20.533 22.426 24.409 Diameter  (inches) 3-1/4 3-1/2 3-3/4 4 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 6-3/4 7 7-1/4 7-1/2 7-3/4 Pounds (per ft.) 28.606 33.143 38.175 43.394 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 123.078 133.779 143.397 153.348 163.633 Diameter  (inches) 8 8-1/4 8-1/2 9 9-1/2 10 10-1/2 11 11-1/2 12 13 13-1/2 14 15 16 18 20 22 Pounds (per ft.) 174.251 185.204 197.178 220.816 245.741 273.753 301.450 330.498 360.874 392.584 462.124 497.918 535.047 613.310 696.913 880.139 1084.725 1310.671 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms  Bars over 10-1/2" diameter are forged. 8-7  Alro delivers...everyday   AISI 4140 AND 41L40* ROUNDS  SIZE CHART       ANNEALED COLD FINISH  Diameter  (inches) Pounds (per ft.) Diameter  (inches) Pounds (per ft.) 3/16 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 0.100 0.170 0.261 0.380 0.510 0.668 0.845 1.043 1.261 1.500 1.763 2.044 2.347 2.670 3.010 1-1/8 1-3/16 1-1/4 1-5/16 1-3/8 1-7/16 1-1/2 1-9/16 1-5/8 1-3/4 1-7/8 1-15/16 2 2-1/8 2-1/4 3.379 3.770 4.172 4.600 5.048 5.517 6.008 6.519 7.050 8.177 9.387 10.023 10.680 12.057 13.517 1 1-1/16 Diameter  (inches) 2-3/8 2-1/2 2-9/16 2-5/8 2-3/4 2-7/8 3 3-1/4 3-1/2 3-3/4 4 4-1/4 4-1/2 5 Pounds (per ft.) 15.060 16.688 17.532 18.398 20.192 22.069 24.030 28.202 32.708 37.547 42.720 48.227 54.068 66.750 •Ref er to pag es 8-34 thru 8-35 for alloy tolerances. Stock lengths 12' (20' available in most sizes). *41L40 is a superior free machining direct hardening alloy (Lead of .15/.35).  AISI 4140/4142 CF Q&T  ROUNDS  SIZE CHART COLD FINISH  4140/4142 CF Q&T SR is a general purpose alloy used where substantial strength, toughness and hardness are required. Through tempering, quenching and the coldnishing process, the end result is improved strength and ductility, improved toughness, better fatigue resistance and superior surface condition. 4140 CF Q&T SR Rounds are also calcium-treated for improved machinability and fully stress relieved after drawing so that distortion during machining is held to a minimum.     Diameter  (inches) 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 Pounds (per ft.) 1.500 2.044 2.670 3.379 4.172 5.048 6.008 Diameter  (inches) 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 Pounds (per ft.) 7.050 8.177 9.387 10.680 13.517 16.688 20.192 Diameter  (inches) 3 3-1/2 3-3/4 4 5 6 Pounds (per ft.) 24.030 32.708 37.547 42.720 66.750 96.120 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 12' randoms Visit the Alro Web Site www.alro.com alro.com 8-8 alro.com  Alro delivers...everyday  TURNED GROUND & POLISHED   AISI 4140  QUENCHED & TEMPERED  ROUNDS  SIZE CHART    Size (inches) Length (ft.) 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-3/16 1- 1/4 1- 3/8 1-7/16 1- 1/2 1- 5/8 1- 3/4 1-7/8 1-15/16 2 12 12 12 12 20 20 20 20 20 20 20 20 20 20 20 20 20 Weight (per ft.) .375 .667 1.042 1.501 2.044 2.670 3.379 3.765 4.171 5.047 5.510 6.007 7.050 8.176 9.387 10.020 10.680 Size (inches) Length (ft.) 2- 3/16 2- 1/4 2- 7/16 2- 1/2 2-11/16 2-3/4 2-15/16 3 3-1/4 3-7/16 3- 1/2 3-15/16 4 4-7/16 4-1/2 5 6 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Weight (per ft.) 12.776 13.516 15.863 16.687 19.277 20.191 23.031 24.030 28.202 31.541 32.707 41.384 42.720 52.564 54.080 66.750 96.120 •Lengths: 12-20 ft.  AISI 4140 ANNEALED  SQUARES  SIZE CHART    Diameter    (inches) 1/2 5/8 3/4 7/8 COLD FINISH  Pounds (per ft.) Diameter  (inches) Pounds (per ft.) Diameter  (inches) Pounds (per ft.) 0.850 1.328 1.913 2.603 1 1-1/4 1-1/2 1-3/4 3.400 5.313 7.650 10.413 2 2-1/2 3 13.600 21.250 30.600  AISI 4140 ANNEALED  HEXAGONS SIZE CHART    Diameter    (inches) 3/8 7/16 1/2 9/16 5/8 3/4 7/8 15/16 COLD FINISH  Pounds (per ft.) Diameter  (inches) Pounds (per ft.) Diameter  (inches) Pounds (per ft.) 0.413 0.563 0.735 0.930 1.148 1.654 2.251 2.584 1 1-1/16 1-1/8 1-1/4 1-3/8 1-7/16 1-1/2 1-5/8 2.940 3.324 3.721 4.594 5.558 6.085 6.625 7.763 1-3/4 1-7/8 2 2-1/4 2-1/2 3 9.004 10.350 11.780 14.910 18.400 26.500 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms 8-9  Alro delivers...everyday   AISI 4140 ANNEALED  FLATS      Size (inches) 1/4 x 1-1/2 2 3 1.28 1.70 2.55 3/8 x 1 1-1/4 1-1/2 2 3 3-1/2 4 1.28 1.59 1.91 2.55 3.83 4.46 5.10 x 1 1-1/2 2 2-1/2 3 4 4-1/2 5 6 1.70 2.55 3.40 4.25 5.10 6.80 7.65 8.50 10.20 x 1 2 2-1/2 3 4 5 6 2.13 4.25 5.31 6.77 8.50 10.63 12.75 1/2 5/8 Size (inches) Pounds (per ft.) 3/4 COLD FINISH  Pounds (per ft.) x 1 1-1/4 1-1/2 2 2-1/2 3 4 5 6 2.55 3.19 3.83 5.10 6.38 7.65 10.20 12.75 15.30 x 1-1/4 1-1/2 1-3/4 2 2-1/2 3 3-1/2 4 5 6 7 8 4.25 5.10 5.95 6.80 8.50 10.20 11.90 13.60 17.00 20.40 23.80 27.20 1-1/4 x 1-1/2 2 2-1/4 3 3-1/2 6.38 8.50 9.56 12.75 14.88 1 Size (inches) Pounds (per ft.) 1-1/4 x 4 4-1/2 5 6 17.00 19.13 21.25 25.50 1-1/2 x 2 2-1/2 3 3-1/2 4 5 6 10.20 12.75 15.30 17.84 20.40 25.50 30.60 2 17.00 20.40 23.80 27.20 34.00 40.80 x 2-1/2 3 3-1/2 4 5 6 2-1/2 x 4 34.00 3 40.80 x 4 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Alro’s Production/Precision Sawing Prodction/Precision Sawing to Yor Specication Your Product Cut To Precision... Length... Squareness... Surface Finish...  Angle Iron Square Tubing Round Tubing Hex Squares Rounds Channel (888) 888-ALRO 2 8-10 5 7 6 Flat Bar   Alro delivers...everyday   AISI 4140/4142 - (MOD) DCF  (ALSO AVAILABLE IN HR) MEDIUM CARBON ALLOY PRE-HARDENED (Cut From Plate) 4140/4142 is a ne pre-hardened alloy steel, ready for use and is machinable in its hardened state 260/321 Brinell. TYPICAL APPLICATIONS  Strippers, Holder Blocks, Mold Bases, Ejectors, Back Up and Support Tooling, Fixtures, Jigs, Molds, Cams, and many more applications where time and money are important considerations. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Molybdenum (Mo) Chromium (Cr) Phosphorus (P) Sulphur (S) Nickel (Ni) FORGING (a) Start forging at Do not forge below NORMALIZING (b)  ANNEALING (c)   Temperature Rate of cooling, max. per hour  Typical annealed hardness, Brinell HARDENING Rate of heating Preheat temperature Hardening temperature Time at temperature, minutes Quenching medium TEMPERING Tempering temperature Approx. tempered hardness, Rockwell C WEAR RESISTANCE TOUGHNESS RESISTANCE TO SOFTENING EFFECT OF ELEVATED TEMPERATURE DEPTH OF HARDENING MACHINABILITY GRINDABILITY DISTORTION IN HEAT TREATING SAFETY IN HARDENING RESISTANCE TO DECARBURIZATION AISI 4140/4142 (MOD) .36/.46 .70/1.70 .15/.45 .15/.35 .75/1.20 .035 MAX .040 MAX .50 MAX 26-34 Medium Very High Low Medium Medium High •Refer to pages 8-34 thru 8-35 for alloy tolerances. 8-11  Alro delivers...everyday   AISI 4140/4142 - (MOD) PRE-HARDENED DCF  FLATS AND SQUARES HR PRE-HARDENED (CUT FROM PLATE) SIZE C  ANNEALED DCF  HR ANNEALED  Size (inches) 1/4 x 1/2 5/8 3/4 1 1-1/8 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 3-3/4 4 4-1/2 5 6 7 8 9 10 12 16 20 24 32 3/8 x 3/8 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 6 7 Size (inches) Pounds (per ft.) 3/8 x 8 10 12 16 20 24 32 10.945 13.667 16.390 21.835 27.280 32.725 43.615 1/2 x Pounds (per ft.) 0.505 0.622 0.739 0.973 1.090 1.207 1.441 1.675 1.909 2.143 2.377 2.611 2.845 3.313 3.547 3.781 4.249 4.717 5.653 6.589 7.524 8.460 9.396 11.268 15.012 18.755 22.499 29.986 0.565 0.735 0.905 1.075 1.416 1.756 2.096 2.437 2.777 3.117 3.458 3.798 4.138 4.819 5.500 8.222 9.583 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 5 6 6-1/2 7 8 9 10 12 14 16 18 20 24 32 5/8 x 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 0.965 1.188 1.410 1.858 2.305 2.751 3.198 3.645 4.091 4.538 4.985 5.432 6.325 7.218 9.005 10.792 11.685 12.578 14.365 16.152 17.938 21.512 25.085 28.658 32.232 35.805 42.952 57.245 1.471 1.748 2.301 2.854 3.407 3.960 4.513 5.066 5.619 •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. Continued on next page  8-12 Size (inches) Pounds (per ft.) 5/8 x 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 32 6.172 6.725 7.831 8.937 10.043 11.149 13.361 17.785 22.209 26.633 35.482 44.330 53.178 70.875 3/4 x 2.084 2.743 3.402 4.062 4.721 5.380 6.040 6.699 7.359 8.018 9.337 10.655 13.293 15.930 21.205 26.480 31.755 42.305 52.855 63.405 84.505 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 5 6 8 10 12 16 20 24 32 7/8 x 7/8 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 2.803 3.185 3.951 4.717 5.483 6.248 7.014 7.780 8.545  Alro delivers...everyday   AISI 4140/4142 - (MOD) PRE-HARDENED DCF  FLATS AND SQUARES HR PRE-HARDENED (Cut From Plate) SIZE CHART ANNEALED DCF HR ANNEALED  Size (inches) 7/8 Pounds (per ft.) x 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 32 9.311 10.843 12.374 13.905 15.437 18.500 24.626 30.751 36.877 49.129 61.380 73.632 98.135 x 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 7 8 9 10 12 16 20 24 32 3.628 4.500 5.372 6.244 7.116 7.988 8.860 9.723 10.604 12.349 14.093 15.837 17.581 21.069 24.557 28.046 31.534 35.022 41.999 55.952 69.905 83.858 111.764 1-1/8 x 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 5 6 8 5.049 6.027 7.984 9.941 11.898 13.854 15.811 19.725 23.639 31.466 1 Size (inches) 1-1/8 x 10 12 16 20 24 32 Pounds (per ft.) 39.293 47.121 62.775 78.430 94.085 125.394 1-1/4 x 1-1/4 5.597 1-1/2 6.682 1-3/4 7.767 2 8.852 2-1/4 9.936 2-1/2 11.021 2-3/4 12.106 3 13.191 3-1/2 15.360 4 17.530 4-1/2 19.699 5 21.869 6 26.208 8 34.886 10 43.564 12 52.243 16 69.599 20 85.080 24 104.311 32 139.024 1-3/8 x 1-3/8 6.742 1-1/2 7.337 1-3/4 8.528 2 9.720 2-1/4 10.911 2-1/2 12.102 2-3/4 13.293 3 14.484 3-1/2 16.866 4 19.248 5 24.013 6 28.777 8 38.306 10 47.835 12 57.364 16 76.422 20 95.480 24 114.538 32 152.654 Size (inches) Pounds (per ft.) 1-1/2 x 1-1/2 7.992 1-3/4 9.290 2 10.587 2-1/4 11.885 2-1/2 13.182 2-3/4 14.480 3 15.803 3-1/2 18.372 4 20.967 4-1/2 23.562 5 26.157 6 31.347 8 41.727 10 52.106 12 62.486 16 83.246 20 104.005 24 124.765 32 166.284 1-3/4 x 1-3/4 10.813 2 12.323 3 18.364 3-1/2 21.384 4 24.404 4-1/2 27.425 5 30.445 6 36.486 8 48.567 10 60.648 12 72.730 16 96.893 20 121.055 24 145.218 32 193.543 2 x 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 14.059 15.781 17.504 19.227 20.950 24.396 27.842 31.287 34.733 41.625 55.407 Size Charts •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. Continued on next page  8-13  Alro delivers...everyday   AISI 4140/4142 - (MOD) PRE-HARDENED DCF  FLATS AND SQUARES HR PRE-HARDENED (CUT FROM PLATE) SIZE  ANNEALED DCF  HR ANNEALED  Size (inches) 2 x 10 12 16 20 24 32 2-1/4x Size (inches) Pounds (per ft.) 69.190 82.973 110.539 138.105 165.671 220.803 2-1/4 2-1/2 3 3-1/2 4 5 6 8 10 12 16 20 24 32 17.730 19.665 23.537 27.408 31.279 39.021 46.763 62.248 77.732 93.217 124.186 155.155 186.124 248.063 2-1/2 x 2-1/2 2-3/4 3 3-1/2 4 5 6 8 10 12 16 20 24 32 21.826 23.975 26.123 30.420 34.716 43.309 51.902 69.088 86.275 103.461 137.833 172.205 206.578 275.322 2-3/4 x 2-3/4 26.348 3 28.709 4 38.153 5 47.597 6 57.041 8 75.929 10 94.817 12 113.704 16 151.480 Pounds (per ft.) Size (inches) Pounds (per ft.) 2-3/4 x 20 24 32 189.255 227.031 302.582 4-1/2 x 20 24 32 309.437 371.035 494.231 3 x 3 3-1/2 4 5 6 8 10 12 16 20 24 32 31.296 36.443 41.591 51.885 62.180 82.769 103.359 123.948 165.127 206.305 247.484 329.842 5 87.113 104.214 138.416 172.618 206.820 275.225 343.629 412.033 548.842 3-1/2 x 3-1/2 4 5 6 8 10 12 16 20 24 32 42.467 48.465 60.461 72.458 96.450 120.443 144.435 192.420 240.405 288.391 384.361 4 55.339 69.037 82.735 110.131 137.527 164.922 219.714 274.506 329.297 438.880 x 4 5 6 8 10 12 16 20 24 32 4-1/2 x 4-1/2 5 6 8 10 12 16 x 5 6 8 10 12 16 20 24 32 5-1/2 x 5-1/2 105.182 6 x 6 8 10 12 16 24 32 124.953 165.962 206.970 247.979 329.996 494.030 658.064 7 x 7 8 10 12 16 20 24 32 169.600 193.507 241.322 289.137 384.767 480.397 576.027 767.287 8 x 8 10 12 16 20 24 32 221.053 275.674 330.295 439.538 548.726 658.024 876.509 70.745 78.445 93.844 124.643 155.442 186.241 247.839 •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. 8-14 Size Charts  Alro delivers...everyday   AISI 4140 - AS ROLLED PLATE  SIZE CHART   ALSO AVAILABLE  IN ANNEALED AND  PRE-HARDENED  4140 Hot Rolled - As Rolled is available to be saw cut or ame cut to custom sizes. Thicness 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4 Weight (per sq. ft.) Thicness Weight (per sq. ft.) 20.42 25.53 30.60 35.735 40.80 51.10 61.30 66.40 71.47 76.575 81.70 91.90 102.10 112.30 122.50 132.73 142.90 153.15 163.30 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 6-3/4 7 7-1/2 8 8-1/4 8-1/2 8-3/4 9 173.57 183.78 193.99 204.20 214.40 224.62 234.83 245.04 255.25 265.45 275.67 285.88 306.30 326.72 336.93 347.14 357.35 367.56 •Refer to pages 8-34 thru 8-35 for alloy tolerances.  Alro has a variety of in-house plate processing services designed to save you time by getting you steps closer to your nished product. Ask your Alro Sales Representative about our plate processing services including grinding, top and bottom. 8-15  Alro delivers...everyday   AISI 4150 HOT ROLLED ANNEALED  4150 grade is a medium-carbon, chromium-molybdenum steel. 4150 is also capable of good strength and wear resistance, has excellent toughness, good ductility and has the ability to resist stress and creep at prolonged high temperatures. In the annealed condition, machinability is improved. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Phosphorus (P) Sulphur (S) Chromium (Cr) Molybdenum (Mo) Silicon (Si) Nickel (Ni) Copper (Cu) Vanadium (V) Aluminum (Al) Hydrogen (H) BRINELL HARDNESS AISI 4150  .48/.53 .75/1.00 .035 max .02/.04 .80/1.10 .15/.25 .15/.35 .25 max .35 max .10 max .020 to .050 3 ppm max 229 max Microstructure - Steel to have a predominately lamellar pearlite structure for optimum machinability.  AISI 4150 HOT ROLLED ANNEALED ROUNDS SIZE CHART  Diameter  (inches) 2 2-1/8 2-1/4 2-3/8 2 -1/2 2-5/8 2-3/4 2-7/8 3 3-1/8 3-1/4 3-1/2 3-5/8 Pounds (per ft.) 10.680 12.234 13.704 15.258 16.896 18.724 20.533 22.426 24.409 26.463 28.606 33.143 35.692 Diameter  (inches) 3-3/4 4 4-1/8 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 Pounds (per ft.) 38.175 43.394 46.123 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 Diameter  (inches) 6-3/4 7 7-1/4 7-1/2 7-3/4 8 8-1/4 8-1/2 8-3/4 9 9-1/4 9-1/2 10 Pounds (per ft.) 123.078 133.779 143.397 153.348 163.633 174.251 185.204 197.178 208.818 220.816 228.456 245.741 273.753 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms Visit the Alro Web Site www.alro.com alro.com 8-16 alro.com  Alro delivers...everyday   AISI 4150R Q&T SR  HR  (RESULPHURIZED, HOT ROLLED, QUENCHED AND TEMPERED, STRESS RELIEVED) 4150R HR Q&T SR is a free-machining alloy steel that provides an outstanding combination of heat treated properties and superior machinability. This alloy steel is manufactured under close quality control for uniformity to an ASTM grain size of 5 to 8. It is especially suitable for service applications where substantial strength, toughness and hardness are required. TYPICAL ANALYSIS AISI 4150  Carbon (C) .48/.53 Manganese (Mn) .75/1.00 Silicon (Si) .15/.30 Tungsten (W) Molybdenum (Mo) .15/.25 Chromium (Cr) .80/1.10 Vanadium (V) Sulphur (S) .06/.10 Phosphorus (P) .035 MAX HEAT TREATMENT Quenched from 1525ºF (828ºC) Tempered at 1100ºF (593ºC) Quenching medium O (I) TENSILE STRENGTH approx. 110,000 lbs psi YIELD POINT approx. 85,000 lbs psi BRINELL HARDNESS 269-321 ROCKWELL C 28-32 ELONGATlON IN 2" 16% REDUCTION IN AREA 51% ROUNDS 1/2" - 10-1/2" Hot rolled, heat treated, stress relieved. BHN 262/311 ROUNDS 11" - 20" Forged, heat treated, stress relieved. BHN 262/311 FLATS AND SQUARES Hot rolled, heat treated, machine straightened, stress relieved. BHN 269/321 •Refer to pages 14-24 thru 14-25 for notes (a) to (o), incI., explanation of letter 0, A, S, B and W. (1) Per ASTM A434 Class BC  Alro Steel  Metals • Indstrial Spplies • Plastics Contact s today and learn more abot The Alro Difference! alro.com (888) 888-ALRO 2 5 7 6 8-17  Alro delivers...everyday   AISI 4150R Q&T SR ROUNDS SIZE CHART  Diameter  (inches) 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2 -1/2 2-5/8 2-3/4 2-7/8 3 3-1/8 3-1/4 Pounds (per ft.) Diameter  (inches) 1.500 2.040 2.676 3.384 4.176 5.052 6.012 7.056 8.172 9.384 10.680 12.234 13.704 15.258 16.896 18.724 20.533 22.426 24.409 26.463 28.606 3-1/2 3-5/8 3-3/4 4 4-1/8 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 6-3/4 7 7-1/4 7-1/2 7-3/4 8 HR  Pounds (per ft.) 33.143 35.692 38.175 43.394 46.123 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 123.078 133.779 143.397 153.348 163.633 174.251 Diameter  (inches) 8-1/4 8-1/2 8-3/4 9 9-1/4 9-1/2 10 10-1/2 11 11-1/2 12 12-1/2 13 13-1/2 14 15 16 17 18 19 20 Pounds (per ft.) 185.204 197.178 208.818 220.816 228.456 245.741 273.753 301.458 330.498 360.874 394.541 427.665 462.124 497.918 535.047 613.310 696.913 785.856 880.139 979.762 1084.725 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms 4150R HR Q&T SR is especially suitable for service applications where substantial strength, toughness, and hardness are required. Visit the Alro Web Site www.alro.com alro.com 8-18 alro.com  Alro delivers...everyday  4150 DYBAR - (MOD) RS  HR 4150 Dybar is a special quality alloy steel that has been resulphurized for considerations for machining. Modications have been made to the chemical composition for increased hardenability. This steel is made by a single slab electric furnace process to a silicon fully killed practice and resulphurized to set limits. TYPICAL ANALYSIS AISI 4150  Carbon (C) .47/.55 Manganese (Mn) .95/1.30 Silicon (Si) .20/.35 Molybdenum (Mo) .15/.25 Chromium (Cr) .60/.90 Vanadium (V) .10 MAX Sulphur (S) .06/.10 Phosphorus (P) .025 MAX Nickel (Ni) .25 MAX Columbium .015/.035 HR  4150 DYBAR - (MOD) RS  FLATS SIZE CHART      Pounds (per ft.) Size (inches) 5/8 x 2-1/2 3 4-1/2 5.471 6.566 9.848 1 x 2-1/2 3-1/2 4-1/2 8.755 12.250 15.759 1-1/8 x 2-1/2 3-1/2 4-1/2 5 8 9.848 13.788 17.728 19.698 31.550 2-1/2 3-1/2 4 4-1/2 5 7 10.943 15.321 17.510 19.698 21.887 30.670 2-1/2 3 3-1/2 4 4-1/2 5 6 7 8 13.132 15.759 18.385 21.012 23.638 26.265 31.518 36.810 42.024 1-1/4 1-1/2 x x Size Pounds (inches) (per ft.) 1-3/4 Size x 3-1/4 Charts19.940 2 x 2-1/2 3 3-1/2 4 4-1/2 5 6 8 17.510 21.012 24.514 28.016 31.518 35.050 42.060 56.080 2-1/2 x 2-1/2 3 3-1/2 4 4-1/2 6 21.887 26.265 30.642 35.020 39.397 52.530 3 x 3 4 5 6 31.518 42.024 52.530 63.036 3-1/2 x 3-1/2 42.899 4 x 4 8 4-5/8 x 4-5/8 74.065 5-1/8 x 5-1/8 93.666 5-5/8 x 5-5/8 112.652 6-1/8 x 6-1/8 133.085 56.040 112.170 •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. 8-19  Alro delivers...everyday   AISI 4340 - ANNEALED/Q&T  HR  4340 is a highly alloyed steel with high nickel and chromium content which assures deep hardening when oil quenched, with high strength characteristics throughout the section. Used for heavily stressed parts operating under strenuous conditions. TYPICAL ANALYSIS AISI 4340  Carbon (C) .38/.43 Manganese (Mn) .60/.80 Silicon (Si) .15/.35 Molybdenum (Mo) .20/.30 Chromium (Cr) .70/.90 Nickel (Ni) 1.65/2.00 Sulphur (S) .040 MAX Phosphorus (P) .035 MAX HEAT TREATMENT Oil Quenched from 1550ºF (828ºC) Temper as shown: 1" Rond (center) Tensile Yield BHN RC 800º 208,000 200,000 415 44 1000º 174,000 163,000 352 38 1200º 142,000 124,000 285 30 4" Rond (1/2 radis) Tensile Yield BHN RC 800º 193,000 184,000 401 42 1000º 170,000 159,000 341 37 1200º 136,000 119,000 269 28 Quench: 1475º to 1550º  Anneal: 1475º to 1700º  Available in Annealed and Q&T machinable state. 4340 is readily available from Alro Steel. Ask your Alro sales representative about our in-house services designed to speed up your turnaround time. 8-20  Alro delivers...everyday   AISI 4340 - ANNEALED ROUNDS  SIZE CHART  Diameter  Diameter  Pounds Pounds Diameter    (inches) (per ft.) (inches) (per ft.) (inches) Size Charts 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-3/4 3 3-1/4 3-1/2 1.500 2.040 2.676 3.384 4.176 5.052 6.012 7.056 8.172 9.384 10.680 12.234 13.704 15.258 16.896 20.533 24.469 28.606 33.143 3-3/4 4 4-1/8 4-1/4 4-1/2 4-5/8 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 6-3/4 7 7-1/2 8 8-1/4 38.175 43.394 46.123 48.939 54.822 58.088 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 123.078 133.779 153.348 174.251 185.204 8-1/2 9 9-1/4 9-1/2 10 10-1/2 11 11-1/2 12 12-1/2 13 13-1/2 14 15 16 17 18 20 HR  Pounds (per ft.) 197.178 220.816 233.100 245.741 273.753 301.458 330.498 360.874 392.584 427.665 462.124 497.985 535.047 613.310 696.913 786.710 880.139 1084.725 •Rounds 1/2" - 11" are Hot Rolled Annealed •Rounds over 11" are Forged, Rough Turned, Annealed. •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms  AISI 4340 - HR Q&T ROUNDS      Diameter  (inches) 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 2-7/8 Pounds (per ft.) 2.670 3.379 4.170 5.048 6.010 7.050 8.180 9.387 10.680 12.234 13.704 15.258 16.896 18.724 20.533 22.426 Diameter  (inches) 3 3-1/8 3-1/4 3-1/2 3-3/4 4 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 Pounds (per ft.) 24.409 26.463 28.606 33.143 38.175 43.394 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 Diameter  (inches) 6-3/4 7 7-1/4 7-1/2 7-3/4 8 8-1/4 8-1/2 9 9-1/2 10 10-1/2 11 11-1/2 Pounds (per ft.) 123.078 133.779 143.397 153.348 163.633 174.251 185.204 197.178 220.816 245.741 273.753 301.458 330.498 360.874 8-21  Alro delivers...everyday   AISI 6150 - ANNEALED  DCF   An electric furnace melt of chrome vanadium steel possessing the following characteristics: oil-hardening, high resistance to vibratory stress, standard deformation, medium hardness, high torque strength and bright polish. TYPICAL APPLICATIONS   Arbors, Heavy Machinery Parts, Gears, Shafts, High Strength Studs and Spindles. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Phosphorus (P) Sulphur (S) Molybdenum (Mo) Chromium (Cr) Vanadium (V) Cobalt (Co) FORGING (a) Start forging at Do not forge below NORMALIZING (b)    ANNEALING (c) Temperature   Rate of cooling, max. per hour  Typical annealed hardness, Brinell HARDENING Rate of heating Preheat temperature Hardening temperature   Time at temperature, minutes Quenching medium TEMPERING Tempering temperature Approx. tempered hardness, Rockwell C WEAR RESISTANCE TOUGHNESS RESISTANCE TO SOFTENING EFFECT OF ELEVATED TEMPERATURE DEPTH OF HARDENING MACHINABILITY GRINDABILITY DISTORTION IN HEAT TREATING SAFETY IN HARDENING RESISTANCE TO CARBURIZATION AISI 6150  .48/.53 .70/.90 .15/.30 .035 MAX .040 MAX .80/1.10 .15 MIN 1750-2150ºF (950-1175ºC) 1600º F (870ºC) 1650-1700ºF (899-927ºC) 1525-1575ºF (828-855ºC) 179-217 Slowly 1500-1550ºF (816-843ºC) O (I) 400ºF (204ºC) 56-58 Medium Very High Low Medium Medium High Medium Low Medium •Refer to pages 14-24 thru 14-25 for notes (a) to (o), incI., explanation of letter 0, A, S, B and W. 8-22  Alro delivers...everyday   AISI 6150 - ANNEALED  FLATS AND SQUARES (Cut From Plate) SIZE CHART  Size Size Pounds Pounds Size (inches) 1/2 x 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 5 6 8 10 12 16 20 24 5/8 x 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 5-1/2 6 7 8 9 10 12 16 20 24 (inches) (per ft.) 0.965 1.188 1.410 1.858 2.305 2.751 3.198 3.645 4.091 4.538 4.985 5.432 6.325 7.218 9.005 10.792 14.365 17.938 21.512 28.658 35.805 42.952 5/8 x  32 3/4 x 3/4 1.471 1.748 2.301 2.854 3.407 3.960 4.513 5.066 5.619 6.172 6.725 7.831 8.937 10.043 11.149 12.255 13.361 15.573 17.785 19.997 1 22.209 26.633 35.482 44.330 53.178 (per ft.) 70.875 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 5 6 8 10 12 16 20 24 32 2.084 2.743 3.402 4.062 4.721 5.380 6.040 6.699 7.359 8.018 9.337 10.655 13.293 15.930 21.205 26.480 31.755 42.305 52.855 63.405 84.505 x 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 7 8 10 12 16 20 24 32 3.628 4.500 5.372 6.244 7.116 7.988 8.860 9.723 10.604 12.349 14.093 15.837 17.581 21.069 24.557 28.046 35.022 41.999 55.952 69.905 83.858 111.764 1-1/8 x 2-1/2 4-1/2 9.941 17.208 (inches) 1-1/4 x 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 32 DCF  Pounds (per ft.) 5.597 6.682 7.767 8.852 9.936 11.021 12.106 13.191 15.360 17.530 19.699 21.869 26.208 34.886 43.564 52.243 69.599 85.080 104.311 139.024 1-3/8 x 1-3/8 6.742 1-1/2 7.337 1-3/4 8.528 2 9.720 2-1/4 10.911 2-1/2 12.102 2-3/4 13.293 3 14.484 3-1/2 16.866 4 19.248 5 24.013 6 28.777 8 38.306 10 47.835 12 57.364 16 76.422 20 95.480 24 114.538 32 152.654 1-1/2 x 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 7.992 9.290 10.587 11.885 13.182 14.480 15.803 18.372 Size Charts •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. Continued on next page  8-23  Alro delivers...everyday   AISI 6150 - ANNEALED  DCF  FLATS AND SQUARES Size (Cut Charts From Plate) SIZE CHART  Size Size Pounds Pounds Size Pounds (inches) (per ft.) 1-1/2 x 4 20.967 4-1/2 23.562 5 26.157 6 31.347 8 41.727 10 52.106 12 62.486 16 83.246 20 104.005 24 127.765 32 166.284 1-3/4 x 1-3/4 10.813 2 12.323 3 18.364 3-1/2 21.384 4 24.404 4-1/2 27.425 5 30.445 5-1/2 33.465 6 36.486 7 42.526 8 48.567 9 54.608 10 60.648 12 72.730 16 96.893 20 121.055 24 145.218 32 193.543 2 x 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 14.059 15.781 17.504 19.227 20.950 24.396 27.842 31.287 34.733 41.625 55.407 69.190 82.973 (inches) 2 x 16 20 24 32 (per ft.) 110.539 138.105 165.671 220.803 2-1/2 x 2-1/2 2-3/4 3 3-1/2 4 5 6 8 10 12 16 20 24 21.826 23.975 26.123 30.420 34.716 43.309 51.902 69.088 86.275 103.461 137.833 172.205 206.578 3 x 3 3-1/2 4 5 6 8 10 12 14 16 20 24 32 31.296 36.443 41.591 51.885 62.180 82.769 103.359 123.948 144.537 165.127 206.305 247.484 329.842 3-1/2 x 3-1/2 4 5 6 8 10 12 16 20 24 32 42.467 48.465 60.461 72.458 96.450 120.443 144.435 192.420 240.405 288.391 384.361 (inches) 4 x 4 5 6 8 10 12 14 16 20 24 32 (per ft.) 55.339 69.037 82.735 110.131 137.527 164.922 192.318 219.714 274.506 329.297 438.880 4-1/2 x 4-1/2 5 6 8 10 12 16 20 24 32 70.745 78.445 93.844 124.643 155.442 186.241 247.839 309.437 371.035 494.231 5 x 5 6 8 10 12 16 20 24 32 87.113 104.214 138.416 172.618 206.820 275.225 343.629 412.033 548.842 6 x 6 8 10 12 16 20 24 32 124.953 165.962 206.970 247.979 329.996 412.013 494.030 658.064 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Sizes not listed above can be cut from plate. Visit the Alro Web Site www.alro.com alro.com 8-24 alro.com  Alro delivers...everyday   AISI 6150 - ANNEALED  ROUNDS  SIZE CHART  Diameter  (inches) Pounds (per ft.) 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-1/2 2-5/8 2-3/4 3 2.676 3.384 4.176 5.052 6.012 7.056 8.180 9.390 10.680 12.230 13.704 16.896 18.724 20.533 24.409 Diameter  (inches) 3-1/4 3-1/2 3-3/4 4 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 7 HR  Size Charts Pounds (per ft.) 28.606 33.143 38.175 43.394 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 103.390 114.985 133.771 Diameter  (inches) Pounds (per ft.) 7-1/2 8 8-1/2 9 9-1/2 10 10-1/2 11 11-1/2 12 13 14 15 16 153.348 174.251 197.178 220.816 245.741 273.716 303.179 332.298 362.751 394.541 462.124 535.047 613.310 696.913 Over 10" is forged •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 20' randoms 6150 offers: oil-hardening, high resistance to vibratory stress, standard deformation, medium hardness, high torque strength, and bright polish. Visit the Alro Web Site www.alro.com alro.com alro.com 8-25  Alro delivers...everyday   AISI 8620/86L20  Carefully controlled proportions of chromium, nickel and molybdenum are responsible for the extensive use of 8620 as a carburizing alloy steel. Valuable features of this grade include extreme surface hardenability and internal strength. TYPICAL ANALYSIS AISI 8620/86L20  Carbon (C) .18/.23 Manganese (Mn) .70/.90 Silicon (Si) .15/.30 Nickel (Ni) .40/.70 Molybdenum (Mn) .15/.25 Chromium (Cr) .40/.60 Phosphorus (P) .035 MAX Sulphur (S) .040 MAX *Lead .15/.35 HEAT TREATMENT Carburize temperature 1700ºF (927ºC) (Allow to cool in carburizing box) Reheat temperature 155OºF (843ºC Quenching medium O (I) TENSILE STRENGTH 92,000 lbs. PSI YIELD POINT 64,000 lbs. PSI BRINELL HARDNESS 192 ROCKWELL B 92 ELONGATION IN 2" 25% REDUCTION IN AREA 58% MACHINABILITY 58% •Refer to pages 14-24 thru 14-25 for notes (a) to (o), incI., explanation of letter 0, A, S, B and W. *Applies only to 8620 leaded alloy steel bars. Need Thermal Processing? At the Alro Steel Processing Center we offer: • Stress Relieving • Normalizing • Annealing Alro Steel Processing Center  alro.com We Process Parts to Your Specifcation For more information call today! 8-26  Alro delivers...everyday   AISI 8620 Size Charts FLATS AND SQUARES CUT FROM PLATE Size (inches) 3/8 x  3/8 1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 6 1/2 x  1/2 5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 7 8 10 12 16 20 24 5/8 x  5/8 3/4 1 1-1/4 1-1/2 1-3/4 2 Pounds (per ft.) 0.594 0.765 0.935 1.105 1.446 1.786 2.126 2.467 2.807 3.147 3.488 3.827 4.168 4.849 5.530 8.252 1.004 1.227 1.451 1.897 2.344 2.791 3.237 3.684 4.131 4.577 5.024 5.471 6.364 7.257 8.151 9.044 10.831 12.618 14.404 17.978 21.551 28.697 35.844 42.991 1.520 1.796 2.349 2.902 3.455 4.008 4.561 Size (inches) 5/8 x 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 3/4 x  3/4 1 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 1 x 1 1-1/8 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 Pounds (per ft.) 5.114 5.667 6.220 6.773 7.879 8.985 10.092 11.198 13.410 17.834 22.257 26.682 35.530 44.378 53.227 2.141 2.801 3.460 4.120 4.779 5.438 6.098 6.757 7.417 8.076 9.395 10.713 12.032 13.351 15.988 21.263 26.538 31.813 42.363 52.913 63.463 3.704 4.141 4.577 5.449 6.321 7.193 8.065 8.937 9.809 10.681 12.425 Size (inches) 1 x 4 4-1/2 5 6 8 10 12 16 20 24 1-1/4 x 1-1/4 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 1-1/2 x 1-1/2 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 10 12 16 20 24 HR  Pounds (per ft.) 14.169 15.914 17.658 21.146 28.123 35.099 42.076 56.028 69.981 83.934 5.692 6.778 7.862 8.947 10.032 11.117 12.201 13.286 15.456 17.625 19.795 21.964 26.304 34.982 43.660 52.338 69.694 87.050 104.406 8.106 10.702 11.999 13.296 14.594 15.891 18.486 21.081 23.676 26.271 31.461 41.841 52.221 62.600 83.359 104.119 124.878 •Refer to pages 8-34 thru 8-35 for alloy tolerances. • Sizes not listed above can be cut from plate. • Weights above include nominal oversize tolerance. Actual weights may vary. Continued on next page  8-27  Alro delivers...everyday   AISI 8620 HR  FLATS AND SQUARES CUT FROM PLATE SIZE CHART  Size Pounds Size Pounds Size Pounds (inches) 1-3/4 x 1-3/4 2 2-1/2 3 4 4-1/2 5 6 8 10 12 16 20 24 2 x 2 2-1/4 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 6 8 9 10 12 16 20 24 2-1/4 x 2-1/4 2-1/2 (per ft.) 10.945 12.456 15.476 18.497 24.537 27.557 30.578 36.619 48.700 60.781 72.862 97.025 121.188 145.350 14.210 15.933 17.656 19.379 21.102 24.547 27.993 31.438 34.885 41.776 55.559 62.451 69.342 83.125 110.690 138.257 165.822 17.900 19.836 (inches) 2-1/4 x 2-3/4 3 3-1/2 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 2-1/2 x 2-1/2 2-3/4 3 3-1/2 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 3 x 3 3-1/2 4 4-1/2 (per ft.) 21.771 23.707 27.578 31.449 35.320 39.191 43.063 46.934 62.418 77.903 93.387 124.357 155.326 165.823 22.015 24.164 26.312 30.609 34.905 39.202 43.498 47.795 52.091 69.277 86.464 103.650 138.022 172.394 206.767 31.522 36.670 41.817 46.964 (inches) 3 x (per ft.) 5 6 8 10 12 16 20 24 3-1/2 x 3-1/2 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 4 x 4 4-1/2 5 5-1/2 6 8 10 12 16 20 24 52.112 62.406 82.996 103.585 124.174 165.353 206.532 247.711 42.730 48.525 54.523 60.521 66.723 72.518 96.510 120.502 144.495 192.480 240.465 288.451 55.408 62.257 69.106 75.955 82.804 110.199 137.595 164.991 219.782 274.574 329.366 •Refer to pages 8-34 thru 8-35 for alloy tolerances. •Sizes not listed above can be cut from plate. Visit the Alro Web Site www.alro.com alro.com 8-28 alro.com  Alro delivers...everyday  Size Charts  AISI 8620 ROUNDS  SIZE CHART  Diameter  (inches)     5/8 3/4 7/8 1 1-1/16 1-1/8 1-3/16 1-1/4 1-5/16 1-3/8 1-7/16 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 2-7/8 3 3-1/8 Pounds (per ft.) 1.044 1.500 2.040 2.676 3.01 3.384 3.76 4.176 4.60 5.052 5.52 6.012 7.056 8.172 9.384 10.680 12.234 13.704 15.258 16.896 18.724 20.533 22.426 24.409 26.463 Diameter  (inches) 3-1/4 3-1/2 3-5/8 3-3/4 4 4-1/8 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 5-3/4 6 6-1/4 6-1/2 6-3/4 7 7-1/4 7-1/2 7-3/4 8 8-1/4 8-1/2 8-3/4 Pounds (per ft.) 28.606 33.143 35.692 38.175 43.394 46.123 48.939 54.822 61.243 67.804 74.699 81.928 90.203 98.146 106.390 114.985 123.078 133.779 143.397 153.348 163.633 174.251 185.204 197.178 208.818 HR  Diameter  (inches) 9 9-1/4 9-1/2 9-3/4 10 10-1/4 10-1/2 11 11-1/2 12 12-1/2 13 14 15 16 17 18 19 20 22 24 Pounds (per ft.) 220.816 233.100 245.741 253.812 273.753 287.439 301.458 330.498 362.752 392.584 434.041 462.124 535.047 613.310 696.913 785.852 880.258 976.590 1084.872 1307.000 1558.188 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 18' - 20' randoms CF  AISI 8620  ROUNDS SIZE CHART  Diameter  (inches)           1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 1 1-1/16 1-1/8 Pounds (per ft.) 0.167 0.261 0.375 0.511 0.668 0.845 1.043 1.262 1.502 1.763 2.044 2.347 2.670 3.014 3.379 Diameter  (inches) 1-3/16 1-1/4 1-5/16 1-3/8 1-7/16 1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/8 2-1/4 2-3/8 2-1/2 2-5/8 Pounds (perSize ft.) 3.765 4.172 4.599 5.048 5.517 6.008 7.050 8.177 9.387 10.680 12.057 13.517 15.060 16.688 18.398 Diameter  Charts (inches) 2-3/4 2-7/8 3 3-1/8 3-1/4 3-3/8 3-1/2 3-3/4 4 4-1/4 4-1/2 4-3/4 5 6 Pounds (per ft.) 20.192 22.069 24.030 26.074 28.202 30.413 32.708 37.547 42.720 48.227 54.068 60.242 66.750 96.120 •Refer to pages 8-34 thru 8-35 for alloy tolerances. Stock lengths 12' (20' available in most sizes). 8-29  Alro delivers...everyday  CF  AISI 86L20  Size Charts ROUNDS SIZE CHART  Diameter  (inches)   Pounds (per ft.) 3/8 1/2 9/16 5/8 3/4 7/8     1 1-1/8 Diameter  (inches) Pounds (per ft.) 1-1/4 1-3/8 1-7/16 1-1/2 1-5/8 1-3/4 1-7/8 2 4.17 5.05 5.52 6.01 7.05 8.18 9.39 10.68 0.38 0.67 0.85 1.04 1.50 2.04 2.67 3.38  AISI 8620  PLATE  Thicness Diameter  Pounds (inches) (per ft.) 2-1/8 2-1/4 2-1/2 2-5/8 2-3/4 3 3-1/2 12.06 13.52 16.69 18.40 20.19 24.03 32.71 HR  Size Charts Weight (per sq. ft.) 1/2 3/4 20.4 30.6 40.8 45.9 51.0 61.2 71.47 81.6 1 1-1/8 1-1/4 1-1/2 1-3/4 2 Thicness Weight (per sq. ft.) 2-1/4 2-1/2 2-3/4 3 3-1/2 4 91.89 102.0 112.31 122.4 142.9 163.3 •Refer to pages 8-34 thru 8-35 for alloy tolerances.  AISI 52100   AISI 52100 is a moderately deep hardening alloy having high resistance to wear, medium toughness, and low resistance to softening at high temperatures. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Silicon (Si) Chromium (Cr) Phosphorus (P) Sulphur (S) AISI 52100  .98/1.10 .25/0.45 .15-.30 1.30/1.60 .025 MAX .025 MAX PHYSICAL PROPERTIES Contact Alro for specic certication. Visit the Alro Web Site www.alro.com alro.com 8-30 alro.com  Alro delivers...everyday   AISI 52100 ROUNDS SIZE CHART  Diameter  (inches) 3/8 1/2 5/8 3/4 13/16 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 1-13/16 1-7/8 2 2-1/4 2-3/8 2-1/2 2-5/8 2-3/4 2-7/8 3 3-1/4 3-1/2 3-3/4 4 4-1/4 4-1/2 4-3/4 5 5-1/4 5-1/2 6 6-1/4 6-1/2 6-3/4 7 7-1/2 8 8-1/2 9 10 11 12 Pounds (per ft.) 0.380 0.667 1.042 1.501 1.760 2.044 2.670 3.379 4.171 5.047 6.007 7.050 8.176 8.780 9.386 10.680 13.512 15.060 16.687 18.400 20.191 22.069 24.030 28.201 32.710 37.547 42.720 48.230 54.067 60.240 66.750 73.590 80.767 96.120 104.296 112.807 123.078 130.830 150.187 170.880 197.178 220.816 273.753 332.298 393.535 CF Spheroidize Annealed, B.Q. HR Spheroidize Annealed, B.Q. X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 8-31  Alro delivers...everyday   ALRO BRAKE DIE  PREHARDENED BRINELL 269/321  Alro Brake Die is a medium alloy steel heat treated at mill by oil quenching and tempering to develop the best balance of mechanical properties. This prehardened steel has every requisite for all around good service in any application requiring wear resistance, toughness, high mechanical properties, and good machinability. In addition, the bars are stress-relieved before nal straightening. This ensures a minimum of residual stresses so that bars remain straight during machining.  ADVANTAGES  Heat treated and ready to use for maximum wear and toughness. Machines easily without warping - due to stress relief treatment. Machines to a smooth surface without grinding. TYPICAL APPLICATIONS  Brake Die steel may be used for all types of dies for the forming and bending of sheets, strip and other at-rolled metallic and non-metallic materials. Many machine parts, requiring a steel with high mechanical properties, can be made from Brake Die. Back up and support tooling, die holders, and short-run stamping and bending dies all offer opportunities to utilize the unique prehardened yet machinable characteristics of Brake Die. TYPICAL ANALYSIS Carbon (C) Manganese (Mn) Molybdenum (Mo) Chromium (Cr) Brake Die .48/.53 .87/1.05 .25/.35 .90/1.25 PHYSICAL PROPERTIES 1" ROUND BAR TESTED ON THE DRAW OF 1200oF (649oC) Tensile Strength............................................141,000 psi Yield Strength ...............................................130,000 psi Elongation ....................................................18% Brinell Hardness ...........................................275 Rockwell C Hardness ...................................28 FLAME HARDENING Higher hardnesses at wear points may be achieved by merely heating a oxyacetylene torch long enough to heat surface to a cherry red at approximately 1,500oF. Maintain ame nozzle 1/4" from work piece. No quench required. This portion of metal will harden to a Rockwell of 54-59; due to the rapid cooling produced by the conduction of heat from the small heated area into the larger adjacent areas which have not been heat treated. Reasonable care should be taken to prevent over heating and melting. Visit the Alro Web Site www.alro.com alro.com 8-32 alro.com  Alro delivers...everyday  KPM SUPER SQUARE  KPM Super Square, with its already-squared edges and tighter tolerances, may reduce purchased weight, many hours of valuable machine time, and increases die build efciency. KPM Super Square THICkNESS FINISH Machined M a c h I n e d M a c h I n e d Ground or Milled THICkNESS TOLERANCE +.015 to +.025 WIDTH FINISH Ground or Milled Machined WIDTH TOLERANCE +.015 to +.025 LENGTH FINISH Saw Cut LENGTH TOLERANCE +.060 to +.187* EDGE SQuARENESS .002 TIR KPM Super Square - Alloy Grades 4140 Annealed 4140 Heat Treated 6150 8620 KPM Super Square - Availability (Flats & Squares)  Available in most thicknesses and widths. Super Square starts at 1/2" thick and 1-1/2" wide up to 12" wide. KPM Super Square - Tolerances Thickness: Width: Squareness within: +.015 to +.025 +.015 to +.025 .002" TIR *Lengths (5-side or 6-side) can be machined to special tolerances if desired. Visit the Alro Web Site www.alro.com alro.com alro.com 8-33  Alro delivers...everyday  HOT ROLLED ALLOY BARS SIZE TOLERANCES   AND OUT-OF-ROUND OR  OUT-OF SQUARE TOLERANCES  Hot Rolled Alloy Bars Round, Square, and Round-Cornered Square Size Tolerances (inches) Specied Sizes (inches) Over under Ot-of-Rond or Ot-of-Sqare Section (inches) Up thru 5/16 Over 5/16 thru 7/16 Over 7/16 thru 5/8 Over 5/8 thru 7/8 Over 7/8 thru 1 Over 1 thru 1-1/8 Over 1-1/8 thru 1-1/4 Over 1-1/4 thru 1-3/8 Over 1-3/8 thru 1-1/2 Over 1-1/2 thru 2 Over 2 thru 2-1/2 Over 2-1/2 thru 3-1/2 Over 3-1/2 thru 4-1/2 Over 4-1/2 thru 5-1/2 Over 5-1/2 thru 6-1/2 Over 6-1/2 thru 8-1/4 Over 8-1/4 thru 9-1/2 Over 9-1/2 0.005 0.006 0.007 0.008 0.009 0.010 0.011 0.012 0.014 1/64 1/32 3/64 1/16 5/64 1/8 5/32 3/16 1/4 0.005 0.006 0.007 0.008 0.009 0.010 0.011 0.012 0.014 1/64 0 0 0 0 0 0 0 0 0.008 0.009 0.010 0.012 0.013 0.015 0.016 0.018 0.021 0.023 0.023 0.035 0.046 0.058 0.070 0.085 0.100 0.120 Out-of-round is the difference between the maximum and minimum diameters of t he bar, measured at the same transverse cross section. Out-of-square section is the difference in perpendicular distance between opposite faces, measured at the same transverse cross section. SIZE TOLERANCES - ROUNDS  Trned & Grond/Trned, Grond & Polished   Diameter  Range (inches) Up thru 1-1/2 Over 1-1/2 thru 2-1/2 Over 2-1/2 thru 3 Over 3 thru 4 Over 4 thru 6 Over 6 Not Heat Treated All Carbons Heat Treated All Carbons +0 - 0.001 +0 - 0.0015 +0 - 0.002 +0 - 0.003 +0 - 0.004 +0 - 0.005 +0 - 0.001 +0 - 0.0015 +0 - 0.002 +0 - 0.003 +0 - 0.005 +0 - 0.006 DCF THICKNESS & WIDTH OVERSIZE RANGES  Thickness 1/2" thru 4" .................... +0.015 to +0.077 oversize on width Thickness over 4" ........................... +0.062 to +0.124 oversize on width Thickness ....................................... +0.015 to +0.035 oversize thru 4" ....................................................... +0.060 to +0.156 over 4" 8-34  Alro delivers...everyday  THICKNESS TOLERANCES  4140 HRA and 8620 HR FLATS   ALL WIDTHS RANGE FROM .035 - .124 OVERSIZE  Thickness (inches) Tolerance 3/8 ..................................................................... +.03 -.01 1/2 ..................................................................... +.03 -.01 5/8 ..................................................................... +.04 -.01 3/4 and 7/8 ........................................................ +.04 -.01 1 to 1-7/8 ........................................................... +.07 -.01 2 to 2-3/4 ............................................................+.11 -.01 3 to 3-3/4 ........................................................... +.13 -.01 4 to 4-1/2 ........................................................... +.15 -.01 STANDARD MANUFACTURING TOLERANCES  COLD FINISHED ALLOY BARS  UNDERSIZE VARIATION IN INCHES  Size & Shape ROUNDS (Cold Drawn Or  Turned & Polished) Up thru 1-1/2 Over 1-1/2 thru 2-1/2 Over 2-1/2 thru 4 Over 4 thru 6 Over 6 Over 8 Carbon thru .28% Max. Max. Carbon Over .28% thru .55% Max. Carbon Over .55% Or  All Carbons Heat Treated .003 .004 .006 .005 .004 .005 .007 .006 .005 .006 .008 .007 .006 .007 .009 thru 8 .007 .008 .010 thru 9 .008 .009 .011 .003 .004 .007 .004 .005 .008 .005 .006 .009 .006 .007 .003 .005 .008 HEXAGONS Up thru 3/4 Over 3/4 thru 1-1/2 Over 1-1/2 thru 2-1/2 Over 2-1/2 thru 3-1/8 .010 SQUARES Up thru 3/4 Over 3/4 Over 1-1/2 thru 1-1/2 .004 .006 .009 thru 2-1/2 .005 .007 .010 Over 2-1/2 thru 3-1/8 .007 .009 .012 FLATS (Width) Up thru 3/4 .004 .006 .009 Over 3/4 thru 1-1/2 .005 .007 .011 Over 1-1/2 thru 3 .006 .008 .013 Over 3 thru 4 .007 .010 .017 Over 4 thru 6 .009 .012 .021 .014 .... .... Over 6 E.T.D. 150 ®  • Tolerances for ats apply to thickness as well as to width. 8-35