For shielded metal – arc welding, these Inconel 625 Socket Weld Flanges has excellent operability. Post-weld heat treatment of Inconel 625 Weld Neck Flanges is not necessary to maintain corrosion resistance. Due to ability of Inconel 625 fasteners to prevent, stress, crevice and pitting corrosion, it is utilized in a diversity of corrosive environments. In mild applications such as atmosphere, fresh or salt water, neutral salts and alkaline media is is almost completely resistant. In more severe situations the nickel and chromium content provides resistance to oxidizing chemicals.