High-carbon low-nickel heat-resistant alloys

Details High-carbon low-nickel heat-resistant alloys High-carbon low-nickel heat-resistant alloys

1992-01-07

1993-03-16

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 47, 420 40, 4205861, C22C 3844

Patent

active

051942216

ABSTRACT:
Air-meltable, castable, machinable, weldable heat-resistant alloys that are very resistant to hot gas corrosion and that exhibit high creep rupture strengths. The alloys are, by weight, about 7.5 to aboout 18% nickel, about 23.5 to about 35% chromium, about 0.85 to about 1.4% carbon, about 0.2 to about 1.8% molybdenum, about 0.2 to about 1.6% tungsten, about 0.1 to about 1.6% columbium (niobium), about 0.2 to about 4% manganese, about 0.2 to about 2.5% silicon, up to about 1.5% cobalt, up to about 0.6% titanium, up to about 0.4% zirconium, up to about 0.4% rare earth elements, up to about 0.1% boron, up to about 0.7% nitrogen, and the balance essentially iron plus the usual minor impurities.

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