... grade: GCR15,GCN5SIALN,GRADE3,100CR6,SUJ2S1,SUJ2,SAE52100,GRADE24,100CRMNSI6-4,C56E2,S53CG,S55CG,S55C-SV,SAE1070M,SAE1055,CARBURIZED,BEARING STEEL ... , Electricity, Machine building industry, Chemical industry, Petroleum, Traffic. GRADE24 100CRMNSI6-4 ball bearing steels