Bearing steel, or steel for rolling elements, is characterized by very high carbon content - about 1%. It is characterized by high hardness, high degree of purity of chemical composition, high hardening capacity, high strength and static fatigue and, in addition, adequate material durability. In this type of steel the main emphasis is on the wear resistance. Components (eg. rollers, rings, spheres) and other components of nearer applications are subject to continuous movement, contact with other components usually under high pressure.In many situations, specific corrosion resistance and resistance for the higher temperatures of the given steels are required. In some situations, by the chemical composition it can be determined and assing the bearing steels under the tool steels. Bearing steels must have a high machinability, no deformation during heat treatment, minimal non-metallic inclusions and sulfur, phosphorus, oxygen as well as a limited susceptibility to surface decontamination.