... standard oil tempered spring steel wire Grade:55CrSi,60Si2Mn,65Mn Dia:6.0~16.0mmStandards: ASTM, BS, DIN, GB, JISAdvantage:1. Marerial: we select good quality spring steel wire ... . Applicable Industriesl: Widely used in automobile, elevator, motorcycle, electric switches, high-speed rail, machinery. Meanwhile, we also can according to the ...