Martensitic tempered steels can be heat treated to give better mechanical properties.
The warmth treatment normally includes three stages:
Austenitizing, in which the steel is warmed to a temperature in the reach 980–1,050 °C (1,800–1,920 °F), contingent upon grade. The subsequent austenite has a face-focused cubic gem structure.
Extinguishing. The austenite is changed into martensite, a hard body-focused tetragonal gem structure. The extinguished martensite is hard and excessively fragile for most applications. Some leftover austenite may remain.
Treating. Martensite is warmed to around 500 °C (932 °F), held at temperature, at that point air-cooled. Higher treating temperatures decline yield strength and extreme elasticity yet increment the stretching and effect opposition.
