A106-B化学成分：碳:<=0.3%锰:0.29%~1.06%磷:<=0.035%硫:<=0.035%硅:>=0.1%铬:<=0.40%铜:<=0.40%钼:<=0.15%镍:<=0.40%钒:<=0.08%机械性能抗拉强度>=415MPA屈服强度>=240MPA伸长率>=30%对应的中国材质20#
