top quality carbon Structural Steel Bar 1.10#,20#,25#,30#,35#,40#,45#,50#, 2. ... . Q195-Q275,40Cr,20-42CrMo,20-30CrMnTiDescriptionCarbon structure steel/carbon steel round bar/flat bar/carbon steel plate/sheetGradeGB Q255/JIS SS490/DIN S275J0/ASTM ... mechinery parts,such as bolt,chain,pull rod,shape steel,steel plate,flat bar steel and so onPackaging We provide the package according to ...