產品介紹材料名稱:優質碳素結構鋼牌號:70Mn標準:GB/T699-1988特性及適用范圍淬透性比70鋼好,經熱處理后可獲得比70鋼更好的強度,熱處理時有過熱敏感性和回火脆性、易產生淬火裂紋。冷塑性變形能力差,焊接性差。承受大應力,磨損條件下的工作零件,如各種彈簧圈.彈簧墊圈.止推環.鎖緊圈.離合器盤,用于制造耐磨、載荷較大的機械零件,如彈簧圈、彈簧墊圈、止推環、離合器盤、鎖緊圈、盤簧等。70mn圖片70mn圖片70MN化學成份碳C:0.67~0.75硅Si:0.17~0.37錳Mn:0.90~1.20硫S:≤0.035磷P:≤0.035鉻Cr:≤0.25鎳Ni:≤0.25銅Cu:≤0.2570MN物理性能力學性能:抗拉強度σb(MPa):≥785(80)屈服強度σs(MPa):≥450(46)伸長率δ5(%):≥8斷面收縮率ψ(%):≥30硬度:未熱處理,≤285HB退火鋼,≤229HB試樣尺寸:試樣尺寸為25mm熱處理規范及金相組織熱處理規范:正火,790℃。●交貨狀態:以不熱處理或熱處理(退火、正火或高溫回火)狀態交貨。要求熱處理狀態交貨的應在合同中注明,未注明者按不熱處理交貨。
國產合金結構鋼:512051404115412041304135414086208640432043405120H5140H4118H4130H4135H4140H4145H8620H4320H4340H   碳素鋼:102010451040H1050106010701080  彈簧鋼:1065109561509260   滾動軸承鋼:52100   日本大同(DAIDO)鋼材:  合金鋼:SCr240SCr440SCM415(SCM21)SCM420(SCM22)SCM425SCM430(SCM2)SCM435(SCM3)SCM440(SCM4)SCM445(SCM5)SACM645(SACM1SNCM220SNCM240            SNCM625SNCM815SNCM415SNCM420SNCM439SCr420SCr440SCr440HSMK22SNC415SNC815SNC631SNC236SNC836SCM415HSCM418HSCM420HSCM430HSCM435H             SCM445HSNC631HSNC815HSNCM220HSNCM420H   碳素結構鋼:SS41SS400S20CS45CS50CS60CS70CS80C   碳素工具鋼:SK3SK4SK5SK6SK7   易切鋼:SUM22SUM24LSUM43   不銹鋼:SUS410SUS420SUS420FSUS430SUS304SUS304LSUS316SUS316LSUS420J2SUH310SUH660SUS440ASUS440BSUS440CSUS440F   彈簧鋼:SUP3SUP6SUP7SUP9SUP10   滾動軸承鋼:SUJ1SUJ2SUJ3