牌号:60Si2Mn (GB/T 1222-1984)  弹簧钢

特性及适用范围:                                                      
     是应用广泛的硅锰弹簧钢，强度、弹性和淬透性较 55Si2Mn稍高。适于铁道车辆、
 汽车拖拉机工业上制作承受较大负荷的扁形弹簧或线径在30mm以下的螺旋弹簧、也适于
 制作工作温度在250 ℃以下非腐蚀介质中的耐热弹簧以及承受交变负荷及在高应力下工
 作的大型重要卷制弹簧。                                                     
                                                                           
化学成份:                                                            
     碳 C : 0.56～0.64                                                      
     硅 Si: 1.50～2.00                                                      
     锰 Mn: 0.60～0.90                                                      
     硫 S : ≤0.035                                                         
     磷 P : ≤0.035                                                         
     铬 Cr: ≤0.35                                                          
     镍 Ni: ≤0.35                                                          
     铜 Cu: ≤0.25                                                          
力学性能:                                                            
     抗拉强度      σb     (MPa):≥1274(130)                                
     屈服强度      σs     (MPa):≥1176(120)                                
     伸长率        δ10     (％):≥5                                        
     断面收缩率    ψ       (％):≥25                                       
     硬度                       :热轧,≤321HB;冷拉+热处理,≤321HB           

 热处理规范及金相组织:                                                
     热处理规范: 淬火870℃±20℃,油冷; 回火480℃±50℃(特殊需要时,±30℃)。 
     金相组织: 回火屈氏体。                                                 
                                                                           
  交货状态:                                                            
     热轧钢材以热处理或不热处理状态交货，冷拉钢材以热处理状态交货。
天津瑞恒通钢铁有限公司位于中央直辖市，公司一直致力于为国内各大模具制造企业、机械加工企业、石油化工企业及航空医疗器械企业等提供优质、齐全的金属原材料。主要供应材料有模具钢、合金结构钢、工具钢、弹簧钢、不锈钢、铝材、铜材等。