Bearing Steel

CeramicSpeed standard steel rings are produced from high carbon chromium steel 100Cr6 / ASTM52100 with Ovako steel purity Q or better.

The steel rings used for our Xtreme and Insulate bearings are made from 100Cr6 (Nr. 1.3505), which is the globally accepted standard bearing steel. 100Cr6, when hardened properly, presents an optimum compromise between surface hardness and core toughness and its machinability allows for raceways with super smooth surfaces allowing quiet and long-lasting bearings.

Our corrosion-resistant and heat-stable bearing series are made from AISI 440C or AISI420 stainless steels. Both materials are superior to 100Cr6 in chemical resistance and hence offer a fine compromise between wear resistance and pure survival in wet or chemically contaminated environments as well as safe running with food contact approval.

Bearing Group
Steel Unit Insulate
SAE/AISI   52100 420 440C (AMS) 5898
DIN   1.3505 1.4021 1.4125 X1 02CrMo17
Density [g/cm3] 7.81 7.7 7.7  
Hardness [HRC] >60 >55 >58 >58
E-modulus [GPa] 212 190 200 223
Expansion Coefficient [x 10-6 /K] 11 10.3 10.2 10.4
Corrosion resistance [-] Limites Good Good Very Good