... Thickness 1.2mm-39mm 3.Grade 10#,20#,45#,16Mn,27SiMn,12Cr1MoV,Q235,ST42 Carbon seamless steel pipe ProductionCarbon seamless steel pipeBrandXin hai fengSpecification10 ... .29mm-1016mm 1/8’’-40’’× 1.2mm-39mmStandardGB, ASTM, API 5L, API 5CT,DIN, JIS ...