Usually, quench-hardened steel is too brittle for practical use; therefore, the technique of tempering is often employed to remove some of the excessive hardness. By heating the steel to a temperature less than that used during the hardening process and prolonging the time the steel is held at this temperature, encourages microstructure evolution. Due to the nature of steel and its alloy, determining the tempering temperature and time is critical to the successful application of the product.

Tempering plays a critical role, along with the hardening process, to ensure Donhad offers complete integrity in the grade of its products.