... #,50#, 2. Q195-Q275,40Cr,20-42CrMo,20-30CrMnTi carbon structural steel high quality1.10#,20#,25#,30#,35#,40#,45#,50 ... Q275,40Cr,20-42CrMo,20-30CrMnTi DescriptionCarbon structure steel/carbon steel round bar/flat bar/carbon steel plate/sheetGradeGB Q255/JIS SS490/DIN S275J0/ASTM ... with many manufacturers in Laiwu, meaning that we can supply our customers with high-quality and low-cost products. ...