Flats - Rounds - Squares - Hollowbar
Standard Sizes - Non-Standard Sizes - Metric Sizes
High resistance to heat checking.
Excellent resistance to thermal shock.
Good size stability.
Good red hardness.
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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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2000-2100° F
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Slow
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Do not forge below 1650° F. Anneal after forging.
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ANNEALING
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1560-1625° F
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Cool slowly at a rate of 35° F per hour to a 1110° F.
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Protect against surface decarburization using controlled atmosphere or by pack-annealing.
Hold at temperature for 2 hours.
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STRESS RELIEVING
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1110-1300° F
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Cool slowly in furnace to 930° F. Then in air.
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PREHEATING
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1400-1500° 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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1830-1900° F
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To minimize distortion, air cool. For maximum hardness diameters greater than
6” should be quenched in oil.
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Soak time is 30 minutes per inch of thickness. Minimum of 1 hour. Allow
to cool to 125-150° F before tempering
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TEMPERING
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(See Chart)
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In air.
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Complete equalization of temperature throughout the tools is essential for good
results. Double temper. Recommended temperature is 1000-1200° F.
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