... Skype: halenliao607 S355J2G3,S355NL, 316/316L Free Forging/ Ring rolling FlangeAvailable Stardard:American Standard: ANSI B16.5 API605 ... , wind generating set flange, tube sheet, forgings, ring and ring gearMaterial:Carbon Steel: A10520#Q235C22.8C21TStE355Rst37-2P250GH S235JRG2SS400 etc ... .Alloy Steel: 1Cr5Mo15Cr5MoF5F11F9A350-LF216Mn16MnR16MnD etc Free Forging Ring rolling Flange first class quality