... 30~200mm surface:2B BA 6K 8K HL Specifications60Si2CrA 1.7102 spring steel stripsmaterial:65 70 85 65Mn 55SiMnV 60Si2MnA 60Si2CrAsize ... HLapplication range: High-strength parts, spring building structure, bus, car wheels, cover platersTempered spring steel stripHardness: 40-55HRC for hardened ... : metal parts,construction tool,agricutural tool,roller shutter spring 60Si2CrA 1.7102 spring steel strip