Corrosion-resisting Fe-Ni-Cr alloy

Details Corrosion-resisting Fe-Ni-Cr alloy Corrosion-resisting Fe-Ni-Cr alloy

1988-05-19

1989-10-24

Rutledge, L. Dewayne

Alloys or metallic compositions

Containing over 50 per cent metal but no base metal

Iron containing

4205861, C22C 3000

Patent

active

048760650

ABSTRACT:
Disclosed in an improvement in a known Ni-Cr-Fe alloy.
The alloy of the invention contains 30 to 32% nickel; 26 to 28% chromium; 0.5 to 1.5% copper; 6 to 7% molybdenum; up to 2% manganese; up to 1.0% silicon; up to 0.2% aluminum; up to 0.03% carbon; 0.10 to 0.25% nitrogen; balance iron and usual impurities.
The alloy of the invention has increased pitting corrosion potential and critical crevice corrosion and pitting corrosion temperatures whereas the resistance of the alloy to commercially pure phosphoric acid has not been decreased.

REFERENCES:
patent: 3044871 (1962-07-01), Mott
patent: 4078920 (1978-03-01), Liljas et al.
patent: 4201575 (1980-05-01), Henthorne et al.
patent: 4487744 (1984-12-01), DeBold et al.

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