M-3 High Speed Steel
Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
Very high red hardness.
Good edge toughness.
Outstanding wear resistance.
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TREATMENT
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TEMPERATURE RANGE
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COOLING/QUENCHING
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NOTES
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FORGING
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1975-2075° F
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Slow.
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Do not forge below 1750° F. Anneal after forging.
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ANNEALING
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1550-1600° F
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Cool slowly at a rate of 35° F per hour to 1000° F.
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For best results, insulating media is desirable. Hold at temperature for 2
hours.
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STRESS RELIEVING
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1100-1300° F
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Cool slowly
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Stress relieve after rough machining
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PREHEATING
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1500-1550° F
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Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up
to temperature as slow as possible.
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HARDENING
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2215-2265° F (furnace)
2175-2225° F (salt bath)
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Quench in air or warm oil. To minimize quenching strains, quench in salt at
1000° F
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For maximum wear resistance, harden at 2265° F. For maximum toughness
and high hardness, harden at 2175° F.
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TEMPERING
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(See Chart)
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Double tempering is recommended. The usual tempering time is 2+2 hours.
Recommended temperature is 1000-1075° F.
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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.