供应中碳钢，低碳钢，鉻钢，锰钢，高碳钢丝中碳钢30#,35#,40#,45#,50#,55#,60#厂家直销，钢带，钢棒 常用圆钢系列合结钢,碳结钢,模具钢,轴承钢,工具钢,弹簧钢,齿轮钢,冷拉圆钢,热扎圆钢,锻制圆钢. 圆钢材质有，20Cr,35Cr,40Cr,45Cr,50Cr,15Mn,16Mn ,50Mn,65Mn, Q235B 15CrMo,20CrMo,35CrMo,42CrMo,5CrMnMo, , Cr12  ,60Si2Mn,20CrMnTi,20MnTiB,ML35,T8A,T9A,T10A,T11A T12A,T13A,3Cr2W8V,20CrMnMo,40CrMnMo,20CrNiMo,27SiMn