... (DN25 mm-1800 mm);Use:using forming a free forging machining and other processes to complete processing; the part is ... 6061,6063,2A50,5154. carbon steel, stainless steelSurface treatment: Transparent oil, rust-proof oil. Aluminum alloy forging flange 5083.5083,2A50, ... 5A05,2A10,6061,6063,2A50,5154. carbon steel, stainless steel