Metal treatment – Stock – Ferrous
Patent
1987-08-14
1989-03-28
Yee, Deborah
Metal treatment
Stock
Ferrous
420 49, 420 52, 21914623, C22C 3842
Patent
active
048160857
ABSTRACT:
Disclosed is a duplex stainless steel containing about 25% chromium, about 2% copper, about 3% molybdenum, about 0.2% nitrogen, about 9% nickel and the balance iron plus modifying elements and impurities. In corrosion conditions, including severe pitting environments, the steel contains up to 3%, and preferably 0.2 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.
REFERENCES:
patent: 3726668 (1973-04-01), Baumel
patent: 3785787 (1974-01-01), Yokota et al.
patent: 3910788 (1975-10-01), Fujioka et al.
patent: 4032367 (1977-06-01), Richardson et al.
patent: 4055448 (1977-10-01), Fujikura et al.
patent: 4099966 (1978-07-01), Chivinsky et al.
patent: 4390367 (1983-06-01), Niehaus et al.
Metals Handbook Ninth Edition, vol. 6, "Welding, Brazing, and Soldering" Glossary/p. 7.
Metals Handbook, Desk Edition, "Glossary of Metallurgical Terms and Engineering Tables"/p. 1.16.
Flasche Lee H.
Sridhar Narasi
Haynes International, Inc.
Phillips Joseph J.
Yee Deborah
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