Oxidation resistant iron base alloy articles for welding

Details Oxidation resistant iron base alloy articles for welding Oxidation resistant iron base alloy articles for welding

1979-11-29

1981-06-09

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75124, 75128B, C22B 000

Patent

active

042722896

ABSTRACT:
An improved oxidation resistant iron base alloy article for welding to another article to form a composite product with reduced heat affected zone cracking is provided consisting essentially of about 0.05 to 0.7% carbon, less than 0.3% columbium, about 15 to 30% cobalt, about 18 to 25% chromium, about 0 to 2% manganese, about 1 to 6% molybdenum, about 0.10 to 0.30% nitrogen, about 15 to 30% nickel, about 0.2 to 0.6% silicon, about 0.1 to 2% tantalum, about 1 to 10% tungsten, about 0 to 0.1% zirconium, about 0 to 0.5% aluminum, about 0 to 0.1% lanthanum and the balance iron >23 w/o with incidental impurities not exceeding 0.6% in aggregate. The combined % of columbium and tantalum being at least 0.4% and the combined carbon and nitrogen being >0.2%.

REFERENCES:
patent: 2432615 (1947-12-01), Franks et al.
patent: 3865581 (1975-02-01), Sekino et al.

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