详情描述:
●化学成份:碳 C :0.62~0.70硅 Si:0.17~0.37锰 Mn:0.90~1.20硫 S :≤0.035磷 P :≤0.035铬 Cr:≤0.25镍 Ni:≤0.30铜 Cu:≤0.25