Alloy / Carbon steel pipes / boiler tubeMaterial: EN: S235JR, S235JO, S235J2, S235JR, ST37, ST52, S355JR, S355JO, S355J2, 17Cr3, 41Cr4, 25CrMo4, 30CrMo4, 34CrMo4, 42CrMo4,ASTM G50, 4130, 4135, 4142, A335P91, A335T91,P22,P11,P12,P5,Russia marked: 17TC, 20XA, 40X, 30XM, 35XM, 40XMOA,GB: 16Mn, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, 20G, 27SiMn,..