1.3302化學成分: 碳 C :1.28 硅 Si:≤0.45 錳 Mn:≤0.40 硫 S :≤0.030 磷 P :≤0.030 鉻 Cr:4.15 銅 Cu:≤0.25 釩 V :3.75 鉬 Mo:0.85 鎢 W :12