Ferrite-austenite stainless steel castings having an improved er

Details Ferrite-austenite stainless steel castings having an improved er Ferrite-austenite stainless steel castings having an improved er

1977-05-06

1978-07-18

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

75125, 75128R, C22C 3842

Patent

active

041013476

ABSTRACT:
Ferrite-austenite stainless steel castings having an improved erosion-corrosion resistance consist by weight percentage of not more than 0.1% of C, 0.2-3% of Si, not more than 2% of Mn, 2.2-4% of Cu, 3-9% of Ni, 20-30% of Cr, 2-6% of Mo, 0.08-0.25% of N, 0.12-0.3% of Sn, at least one of 0-2% of Nb, 0-1% of Ti, 0-2% of Ta, 0-1% of Zr and 0-1.5% of V and remainder of Fe, and are obtained by solution heat treatment at 1,000.degree.-1,150.degree. C in such a manner that Cr- and Ni-equivalents lie within an area represented by the area ABCD shown in FIG. 1 of the accompanying drawings.

REFERENCES:
patent: 3337331 (1967-08-01), Ljungberg
patent: 3567434 (1971-03-01), Richardson et al.
patent: 3785787 (1974-01-01), Yokota et al.
Metals Abstracts, Sep. 1971, p. 1327, Abstract #35-1078.

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