r 碳素工具钢带SK4r r r r r r r r r r 产地/厂家r r r r r 住友、浦项r r r r r 材质r r r r r SK4r r r r r r r 规格r r r r r 0.1-5.0*5-1220r r r r r r r r r r 材料介绍r r r r 牌号：SK4r r r 化学成分r r r r r r r Cr r r r r Sir r r r r Mnr r r r r Pr r r r r Sr r r r r r r 0.90r r r r r -r r r r r -r r r r r -r r r r r -r r r r r r r 1.00r r r r r 0.35r r r r r 0.50r r r r r 0.030r r r r …[查看详情]