1. 42CrMo4, C45, 304, 316, F1, F91. 2. OD5000mm, Thickness 600mm 3. Rough machining, Finished machining High quality and lowe 1), Sizes: from DN10 to DN3000;2), Material: carbon steel, stainless steel and alloy steel;3), Standard: ANSI, DIN, EN1092-1, NFE, AS, JIS and customers' drawings for special use;4), Types: WN, SO, BL, Plate, Thread, Socket and etc;5), Process: free forging, plate cutting; ...