Metal heat treating (similarly metal heat treatments) refers to a group of engineering and metalworking processes that have a primary focus on the alteration of the physical, and commonly chemical, properties of metal.
According to experts, the most common application is metallurgical. Furthermore, heat treatments are also used in the manufacture of many other materials, such as glass. Metal heat treatment involves heating to extreme temperatures, to achieve the desired result of hardening the material.
Core heat treatments include annealing, case hardening, precipitation strengthening, tempering, carburising, normalising and quenching.