Bearing steel has a long life, its thermal conductivity is low ... market, we can supply you the lowest price and the best quality goods.The grade: GCR15,GCN5SIALN,GRADE3,100CR6,SUJ2S1, ... ,100CRMNSI6-4,C56E2,S53CG,S55CG,S55C-SV,SAE1070M,SAE1055,CARBURIZED,BEARING STEEL,G20CRNIMO,G20CRNI2MOThe thickness: 1-200mmThe outer diameter: 5- ... future. We believe tomorrow will be better. GCR15 ball bearing steels