seamless steel pipesmaterial:carbon steel pipe standard:ASTM,DIN,JIS,GB,EN and so on size:10.3~813 thickness:1.24~59.54 quan Standard: JIS, GB, DIN, ASTM, APIStandard: JIS G3454-2007, JIS G3455-2005, JIS G...Grade: 10#-45#, Cr-Mo alloy, 16Mn, A53-A369, AP...Grade: 10#, 20#, 45#, 15CrMo, 12Cr1MoV, 16Mn, A...Thickness: 2 - 70 mmSection Shape: RoundOuter Diameter: 21.3 - 610 mmPlace of Origin: ...