... / boiler tube, all son seamless steel pipes Alloy / Carbon steel pipes / boiler tubeMaterial: EN: S235JR, S235JO, S235J2, S235JR, ST37, ST52, ... , 40X, 30XM, 35XM, 40XMOA,GB: 16Mn, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, 20G, 27SiMn, 12CrMoVG, 15CrMoG, 10CrMo910,WB36,Cr5Mo,Cr9Mo,Sizes ... by Third Inspection: LR, ABS, GL, DNV, SGS, BV, etc Alloy / Carbon steel pipes / boiler tube