Heat Treatment  of steel and other suitable metals involves the heating of the items to specific temperatures where desired metallurgical changes to the microstructure takes place. These temperatures can range from as low as 250ᵒC to temper hardened steel to as high as 1150ᵒC on certain Tool Steels. The main purpose of Heat Treatment is to obtain the desired Hardness, Tensile Strength, Ductility, Internal Stress Levels and Microstructure in the steel.