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 ... manufactured by Laiwu Steel Group.Mrs,LiTelephone:86-0634-6461612,13054836377Mobile Phone: 13963400909Fax: 86-0634-6461613 carbon steel round bars,high quality round ...