20# carbon steel pipe 1.Standard:ASTM,AISI,EN,DIN,BS 2.O.D:3mm~500mm 3.W.T:1mm~50mm 4.fast delivery.superior quality About the Products: Descriptioncarbon steel pipe,seamless steel pipe,steel pipe StandardGB5310-95,GB8087-1999,GB8162,GB8163-1999,GB3087,GB6479-86,ASTM A106,A53,A210,DIN17175Material10#,20#,45#,16Mn,14MnNb,20G,ST35.8,A106B,12CrMo,15CrMo,20CrMo,42CrMo,12Cr1Mov,10CrMo910,35CrMo4O.D3mm ...