k40f的精选

化学成分:碳&nbspC&nbsp：0.37~0.44硅&nbspSi：0.17~0.37锰&nbspMn：0.50~0.80硫&nbspS&nbsp：允许残余含量≤0.035磷&nbspP&nbsp：允许残余含量≤0.035铬&nbspCr：0.80~1.10镍&nbspNi：≤0.30铜&nbspCu：允许残余含量≤0.030k40f钢材...