Heat Treating and Tempering information
8670
Hardening
Austenizing temperature - 1,550
Hold/Soak Time - 3-10 minutes
Expected Rc (as quenched) - 63-65
Oil Quench - Parks 50
Tempering
Temper twice for 2hrs.
300°F - 325°F - 62-63
375°F - 400°F - 61-62
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15N20
Hardening
Austenizing temperature - 1,450 to 1,480°F / 801°C
Hold/Soak Time - 5-15 minutes
Expected Rc (as quenched) - 64-65
Oil Quench
Tempering
Temper twice for 2hrs.
400°F / 204°C - 60-61
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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80CRV2
Hardening
Austenizing temperature - 1,465 to 1480°F / 801°C
Hold/Soak Time - 5-15 minutes
Expected Rc (as quenched) - 64-65
Oil Quench
Tempering
Temper twice for 2hrs.
350°F / 177°C - 63-64
400°F / 204°C - 60-61
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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440C
Hardening
Pre-Heat/Equalizing - 1,425°F / 760°C (hold 15 minutes)
Austenizing temperature - 1,875°F / 1038°C Soak 30 minutes
Expected Rc (as quenched prior to cryo) - 59Rc (61 after Cryo)
Air Quench
Tempering
Temper twice for 2hrs.
300°F / 149°C - 60
400°F / 204°C - 59
500°F / 260°C - 57
600°F / 316°C - 56
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5160
Hardening
Austenizing temperature - 1,465 to 1480°F / 801°C
Hold/Soak Time - 5-15 minutes
Expected Rc (as quenched) - 63-62
Oil Quench
Tempering
Temper twice for 2hrs.
350°F / 177°C - 62-61
400°F / 204°C - 60-59
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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52100
Hardening
Austenizing temperature - 1,465 to 1480°F / 801°C
Hold/Soak Time - 5-15 minutes
Expected Rc (as quenched) - 64-65
Oil Quench
Tempering
Temper twice for 2hrs.
350°F / 177°C - 63-64
400°F / 204°C - 60-61
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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A2
Hardening
Pre-Heat/Equalizing - 1,450°F / 787°C (hold 15 minutes)
Austenizing temperature - 1,750°F / 954°C Soak 30 minutes
Expected Rc (as quenched prior to cryo) - 63Rc (64 after Cryo)
Air or Oil Quench
Tempering
Temper twice for 2hrs.
300°F / 149°C - 64
350°F / 177°C - 63
400°F / 204°C - 62
450°F / 232°C - 61
500°F / 260°C - 60
600°F / 316°C - 58
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CPM 154
Hardening
Pre-Heat/Equalizing - 1,400°F / 760°C (hold 15 minutes)
Austenizing temperature - 1,950°F / 1065°C Soak 30 minutes
Expected Rc (as quenched prior to cryo) - 61Rc (63 after Cryo)
Air Quench
Tempering
Temper twice for 2hrs.
300°F / 149°C - 63
400°F / 204°C - 62
600°F / 316°C - 60
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O-1
Hardening
Austenizing temperature - 1,465 to 1480°F / 801°C
Hold/Soak Time - 20-30 minutes
Expected Rc (as quenched) - 64-65
Oil Quench
Tempering
Temper twice for 2hrs.
350°F / 177°C - 63-64
400°F / 204°C - 60-61
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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W-2
Hardening
Austenizing temperature - 1,450 to 1,475°F / 801°C
Hold/Soak Time - 5-15 minutes
Expected Rc (as quenched) - 64-65
Oil Quench - Parks 50
Tempering
Temper twice for 2hrs.
350°F / 177°C - 63-64
400°F / 204°C - 60-61
450°F / 232°C - 57-58
500°F / 260°C - 55-56
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