... Material45#,20# carbon steel20cr,40Cr,20CrMo low alloy steel Making process cold-rolled StandardBS,GB, DIN, ASTM, APIBS1387,GB/T8163, ... ,DIN1629/3,DIN2391Grade10#,20#,45#,16Mn,ST35-ST52,low alloy steel Size OD18-121mm, thickness 2-25mmPlace of originLiao cheng city ... Jin shan steel pipe Co.,LTD in Shandong provinceour web www. Jinshangangguan.com ...