Tough weldable duplex stainless steel

Details Tough weldable duplex stainless steel Tough weldable duplex stainless steel

C - Chemistry, Metallurgy

22

C

75/100

C22C 38/44 (2006.01) B23K 35/30 (2006.01) C22C 38/42 (2006.01)

Patent

CA 1332673

ABSTRACT OF THE INVENTION Disclosed is a duplex stainless steel containing about 25% chromium, about 2% copper, about 3% molybdenum, about .2% nitrogen, about 9% nickel and the balance iron Flus modifying elements and impurities. In corrosion conditions, including severe pitting environments, the steel contains up to 3%, and preferably .2 to 1.0% niobium. The alloy is especially suited for use as a welding filler material. The steel, after welding, has improved Charpy impact properties, increased tensile ductility and corrosion resistance. The steel is also suited for use in the form of cast, wrought or powder products.

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