Duplex stainless steel having improved corrosion resistance

Details Duplex stainless steel having improved corrosion resistance Duplex stainless steel having improved corrosion resistance

1992-09-29

1994-02-08

Yee, Deborah

Metal treatment

Stock

Ferrous

148327, C22C 3844

Patent

active

052845303

ABSTRACT:
A high-Cr, high-Mo duplex stainless steel having excellent corrosion resistance as well as improved toughness and workability has a chemical composition which consists essentially, on a weight basis, of C: 0.03% or less, Si: 0.4% or less, Mn: 2.0% or less, Cr: 26.0-30.0%, Ni: 5.0-9.0%, Mo: 3.0 -4.5%, N: 0.10-0.35%, Al: 0.01-0.04%, optionally one or both of Cu and W in a total amount of 0.05-3.0% and/or one or more elements selected from Ca, B and Ce in a total amount of 0.001-0.01%, and a balance of Fe and incidental impurities, wherein the following inequality (1) is satisfied:

REFERENCES:
patent: 4604887 (1986-08-01), Ohtsubo et al.

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