产品介绍材料名称:优质碳素结构钢牌号:70Mn标准:GB/T699-1988特性及适用范围淬透性比70钢好,经热处理后可获得比70钢更好的强度,热处理时有过热敏感性和回火脆性、易产生淬火裂纹。冷塑性变形能力差,焊接性差。承受大应力,磨损条件下的工作零件,如各种弹簧圈.弹簧垫圈.止推环.锁紧圈.离合器盘,用于制造耐磨、载荷较大的机械零件,如弹簧圈、弹簧垫圈、止推环、离合器盘、锁紧圈、盘簧等。70mn图片70mn图片70MN化学成份碳C:0.67~0.75硅Si:0.17~0.37锰Mn:0.90~1.20硫S:≤0.035磷P:≤0.035铬Cr:≤0.25镍Ni:≤0.25铜Cu:≤0.2570MN物理性能力学性能:抗拉强度σb(MPa):≥785(80)屈服强度σs(MPa):≥450(46)伸长率δ5(%):≥8断面收缩率ψ(%):≥30硬度:未热处理,≤285HB退火钢,≤229HB试样尺寸:试样尺寸为25mm热处理规范及金相组织热处理规范:正火,790℃。●交货状态:以不热处理或热处理(退火、正火或高温回火)状态交货。要求热处理状态交货的应在合同中注明,未注明者按不热处理交货。
国产合金结构钢:512051404115412041304135414086208640432043405120H5140H4118H4130H4135H4140H4145H8620H4320H4340H   碳素钢:102010451040H1050106010701080  弹簧钢:1065109561509260   滚动轴承钢:52100   日本大同(DAIDO)钢材:  合金钢:SCr240SCr440SCM415(SCM21)SCM420(SCM22)SCM425SCM430(SCM2)SCM435(SCM3)SCM440(SCM4)SCM445(SCM5)SACM645(SACM1SNCM220SNCM240            SNCM625SNCM815SNCM415SNCM420SNCM439SCr420SCr440SCr440HSMK22SNC415SNC815SNC631SNC236SNC836SCM415HSCM418HSCM420HSCM430HSCM435H             SCM445HSNC631HSNC815HSNCM220HSNCM420H   碳素结构钢:SS41SS400S20CS45CS50CS60CS70CS80C   碳素工具钢:SK3SK4SK5SK6SK7   易切钢:SUM22SUM24LSUM43   不锈钢:SUS410SUS420SUS420FSUS430SUS304SUS304LSUS316SUS316LSUS420J2SUH310SUH660SUS440ASUS440BSUS440CSUS440F   弹簧钢:SUP3SUP6SUP7SUP9SUP10   滚动轴承钢:SUJ1SUJ2SUJ3