... .2mm-13mm Standard:ASTM, DIN, GB, Other high tensile spring steel wire Product Detail Steel Gradehigh carbon steel,60#,65#,70#,ectStandardASTM,DIN,GBSize:as ... galv, self-colorTensile strength1570,1670,1770,1870,1960MPaOEM or notallowed high tensile spring steel wire