... :C1006,C1010,C1018,C1022,C1035K, C1045,etc. 8.Alloy steel:SCM435,10B21,etc.ApplicationElectronic equipment,Machinery,Buildings,Sanitary fittings,Sports equipment ... 4.8, Class 6.8, Class 8.8, Class 10.9, Class 12.9,etc.Surface finishingPlain,polishing,zinc plated, Ni-plated,Tin ...