... Q195-Q275,40Cr,20-42CrMo,20-30CrMnTi carbon structural steel high quality1.10#,20#,25#,30#,35 ... ,20-30CrMnTi DescriptionCarbon structure steel/carbon steel round bar/flat bar/carbon steel plate/sheetGradeGB Q255/JIS ... steel, etc. All these products are manufactured by Laiwu Steel Group.Mrs,LiTelephone:86-0634-6461612,13054836377Mobile Phone: 13963400909Fax: 86-0634-6461613 carbon structural steel ...