Recommended Heat Treating Practice
Normalizing. Heat to 900 “C ( I650 F). Cool in air
Annealing. Heat to 845 “C ( I555 F). Furnace cool to 650 “C ( I200 “F). at a rate not to exceed 28 “C (5O“F) per h
Hardening. Heat to 845 ‘C ( I555 “F). Flame hardening carbonitriding. and liquid carburizing are suitable surface hardening processes. Quench in water or brine. Rounds less than 6.35 mm (1/4 in.) diam may he oil quenched for full hardness
Tempering after Hardening. As-quenched hardness of approximately 52 HRC. Hardness can be reduced by tempering