... ~16.0mm Standards: ASTM, BS, DIN, GB, JIS oil tempered and quenched spring steel wire Grade: 55CrSi, 60Si2Mn, 65Mn Dia: ... improve the fatigue life of spring 5. Applicable Industriesl: Widely used in automobile, elevator, motorcycle, electric switches, high-speed rail ... new AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); oil quenched and tempered spring steel wire