Austempering is a heat treating process for medium-to-high carbon ferrous metals, Especially for Spring Steel Components like EN42J, C45, C55, C62, C80 which produces a metallurgical structure called bainite. It is used to increase strength, toughness, and reduce distortion. Microstructure Benefits:Austempering is a hardening process for metals(Special process for Spring Steel Components) which yields desirable mechanical properties including: * Higher ductility, toughness, and strength for a given hardness.* Resistance to shock* Reduced distortion, specifically with thin parts.* Quenching cracks are avoided.