Changes made in the composition of stainless steels so as to provide the mechanical and chemical properties desired according to the fields of application affect also their machining. All production processes such as heat treatment, production with or without machining, and chemical processes create residual stresses on the machine parts. Stress on materials occurs due to especially the methods of machining. These stresses may as well render harmful effects that may cause a decrease in the fatigue strength of the machine elements, and eventually dimensional changes. Therefore, it is necessary to know the residual stress values on machine elements.