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Tempering. (in metallurgy), a type of heat treatment, in which a quenched alloy is reheated to a temperature below the first critical point, is held at that temperature, and is subsequently cooled. The term âtemperingâ is mainly applied to steels.
Metal Tempering. Tempering is done to develop the required combination of hardness, strength and toughness or to relieve the brittleness of fully hardened steels. Steels are never used in the as quenched condition. The combination of quenching and tempering is important to make tough parts.