Conventional heat treatment of steel involves heating the material to its austenitizing temperature, followed by quenching and tempering. Rapid cooling transforms austenite to martensite which begins and finishes at the martensite start temperature (MS) and martensite finish temperature (MF) respectively.

Keywords : Retained Austenite; Cryogenic Treatment; Stainless Steels; Tool Steels; Carburized Steels