ASTM standard oil tempered spring steel wire Grade:55CrSi, ... ASTM, BS, DIN, GB, JIS ASTM standard oil tempered spring steel wire Grade:55CrSi,60Si2Mn,65Mn Dia:6 ... life of spring5. Applicable Industriesl: Widely used in automobile, elevator, motorcycle, electric switches, high-speed rail, machinery. Meanwhile, ... 15801400~15501500~16501630~17801740~18903540 ASTM standard oil tempered spring steel wire