bearing steel round bar GCr15/52100: C:0.95~1.05, Si:0. ... , Cr:1.40~1.65, Mo max0.10, bearing steel round bar GCr15/52100Specification :1,Technic:Forged,ESR ,Hot rolled2,Material ... ,100CRMO7,20MNCR4-2, 20NICRMO2,20NICRMO7,X108CRMO17,18NICRMO14-63,Shape:Round bar,square bar,flat bar,rectangular bar4,Size:20-200 MM for ... .50max0.025max0.0250.90-1.20max 0.25 bearing steel round bar GCr15/52100