Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
TREATMENT |
TEMPERATURE RANGE |
COOLING/QUENCHING |
NOTES |
FORGING |
1700-2100° F |
Slow. |
Cool slowly in dry sand or in other insulating media. |
ANNEALING |
1600-1650° F |
Cool slowly at a rate of 35° F per hour to 1000° F. |
For best results, insulating media is desirable. Hold at temperature for 2 hours. |
STRESS RELIEVING |
1100-1300° F |
Cool slowly |
Stress relieve after rough machining |
PREHEATING |
1500-1550° F |
|
Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible. |
HARDENING |
2325-2375° F (furnace)
2275-2350° F (salt bath)
|
Quench in air or warm oil. To minimize quenching strains, quench in salt at 1000° F |
For maximum wear resistance, harden at 2375° F. For maximum toughness and high hardness, harden at 2275° F. |
TEMPERING |
(See Chart) |
|
Double tempering is recommended. The usual tempering time is 2+2 hours. Recommended temperature is 1000-1075° F for cutting tools. 1100-1200° F for shock tools |
Data is typical and should not be construed as actual values for any catagory.
Applications and technical information require engineers and tool designers to exercise independent judgement.