化學(xué)成分:
碳 C :0.52~0.60硅 Si:0.17~0.37錳 Mn:0.65~0.95硫 S :≤0.030磷 P :≤0.030鉻 Cr:0.65~0.95鎳 Ni:≤0.35銅 Cu:≤0.25釩V:0.10~0.20