... motorcycle chain,industrial chain,engine chain 2.material:10#,20Mn,SCM420,20CrMnMo,20CrNiMo,20CrMo,SWRCH15A. NameNoMaterialChemistry compontentsCSiMnPSCrNiMoBush1SWRM6 ... 0.030.25-0.50≤0.045 5100.07-0.140.17-0.370.35-0. ... 35-0.750.20-0.30Our factory produce 10# standard and non-standard chain bush for ... ., Ltd. established in 2002 with more than 10 years' chain material and components produce experience,it ...