... .00mm-12.00mm. 4.Material:77B 82B Low relaxation high strength high quality steel wireSteel wire,spring steel wire,carbon steel ... : GB4357-89, DIN17223, JIS, BS, ASTM,etc.. Have good tensile strength and elongation,bending. Can make steel wire for making ropes ... accord DIN17223, JIS, BS, ASTMstandard. Low relaxation high strength high quality steel wire