AISI 52100 100Cr6, 1.3505 Chrome steel balls are normally used in precision ball bearings and many industrial applications. Diameter: 0, 5 mm - 150 mm The balls made of this kind of material feature excellent surface finish, considerable hardness and a high load carrying capacity, as well as excellent wear and deformation resistance. Chrome steel balls are through hardened in order to achieve the maximum mechanical strength. Chrome steel balls are used in bearings, valves, for milling and polishing application and Master balls.