Stress Relieving

For steels and irons, stress relief occurs when a material is heated to a temperature below the lower transformation temperature of the material and held for a pre-determined period of time. The temperature for nonferrous metals may vary from a few degrees above room temperature to 300 degrees, depending on the alloy and the amount of stress relief that is desired. After heating, the material is cooled slowly to prevent the creation of new stress. The main purpose of stress relieving is to relieve stresses caused from forming, shaping, rolling, machining, or welding.