Auto Universal Joint 1.Raw Material :20Cr/20CrMnTi(structural Alloy Steel): For Spider:20Cr / 20CrMnTi; For Bushing:20Cr/GCr15; For Needle Roller:GCr15. For Cross Assembly: 20CrMnTi 2.chemical Component: C:0.18~0.24 Si:0.17~0.37 ...Read More