最新报价20Mn2 20Mn2圆钢/钢板
供应20Mn2合金结构钢20Mn2圆钢20Mn2合结钢厂家直销  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2

牌号:20Mn2  (GB/T  3077-1988)    
          特性及适用范围:                                                                                                            
          具有中等强度，冷变形时塑性高，低温性能好，与相应含碳量的碳钢相比，其淬透
  性较高。一般用作较小截面的零件，与20Cr钢相当，可作渗碳小齿轮、小轴、钢套、活
  塞销、柴油机套筒、汽车转向滚轮轴、汽门顶杆等；也可作调质钢用，如冷镦螺栓或较
  大截面的调质零件。

          化学成份:                                                                                                                        
          碳  C  :  0.17～0.24                                                                                                            
          硅  Si:  0.17～0.37                                                                                                            
          锰  Mn:  1.40～1.80                                                                                                            
          硫  S  :  允许残余含量≤0.35                                                                                            
          磷  P  :  允许残余含量≤0.35                                                                                            
          铬  Cr:  允许残余含量≤0.30                                                                                            
          镍  Ni:  允许残余含量≤0.30                                                                                            
          铜  Cu:  允许残余含量≤0.30        

供应20Mn2合金结构钢20Mn2圆钢20Mn2合结钢厂家直销  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2  20Mn2