S2工具钢，具体化学成份如下: 
  Carbon=0.40 to 0.55%
   Silicon=1.0%max
   Mnnganese=0.3 to 0.5%
   Phosphorus=0.03%max
   Sulphur=0.03%max
   Holy=0.3 to 0.6%
   V=0.50%maxS2 工具钢 手工具,气动起子头等工具棒才

工具钢S2的化学成分%: C :0.40-0.55 Mn :0.30-0.50 P :≤0.030 S :≤0.030 Si :0.90-1.20 Cr : V :≤0.35 W : Mo :0.30-0.60