carbon steel round bars,high quality round bars 1.20Cr,40Cr,20.35.42CrMo 2.10#,--50# 3. ... Q195-Q275,40Cr,20-42CrMo,20-30CrMnTi carbon steel round bars,high quality round bars2.10#,20#,25#,30#,35#,40#,45#,50 ... party inspection institution:CIQ,SGS,ITS,BV,etc)Delivery StateHot forged,Black&AnnealingHardnessHBS=137~269Characteristic Applicationwelding is well,Used for making ...