440C STAINLESS TOOL STEEL

 

 

STRESS RELIEVING

Heat to 650C / 700C.  Hold for 2-4 hours and furnace cool.

 

HARDENING

Heat slowly to 1010C / 1060C and oil quench. Smaller sections can be air cooled.  As quenched hardness in the range of Rockwell "C" 60 / 61 is possible.