For Oil Hardening (Dimensionally Stable) Precision Ground Flat Stock and Die Stock:
HARDENING: OIL HARDENING
It is recommended that stock be heated uniformly to 1450 - 1500 F degrees and quenched in oil. Temperature of the quenching oil should be 120o to 140o F for best results. Do not quench in water as this is an oil hardening steel.
For maximum toughness, a tempering time of one hour at temperature is
300o - 350o F (Light Straw)
For Air Hardening (Dimensionally Stable) Precision Ground Flat Stock and Die Stock:
HARDENING AIR HARDENING
Air Hardening Precision Ground Die Stock has a wide hardening range of 1700o to 1800oF with 1750oF recommended for most work. For the heavier sections use the high side of the range. Heat uniformly throughout but do not soak longer than necessary. Cool in still air. No pre-heat is required if pack or atmosphere controlled furnace methods are used, but with open furnace method a pre-heat of 1450oF is recommended.
A tempering time of two hours at temperature is recommended. For maximum toughness, double temper for two hours at each temperature recommended. The following table may be used as a guide, depending on type of work:
Light Blanking Punches & Dies
400o - 425oF
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