... 1Standard: AISI, ASTM, BS, DIN, GB, JIS 2.Model Number: bearing steel 3.Technique: Hot Rolled ASTM 52100 bearing ... steel round bar Standard: AISI, ASTM, BS, DIN, GB, JIS ... confirmed orderSpecificationASTM 52100 bearing steel high quality,good price ASTM 52100 bearing steelChemical composition(%): SteelCSiMnPSCrMoNiVOthersHBWGCr150.95-1.050 ...