The stress in a body resulting from some previous forming and/or heat treatment operation. Found for example in castings, weldments and cold formed parts.
Stresses induced by set removal, shot peening, cold working, forming or other means. These stresses may or may not be beneficial, depending on the application.
Stress mechanically induced by such means as set removal, shot-peening, cold working, or forming. It may be beneficial or not, depending on the spring application.