High nickel chromium alloy
AssigneeInco Alloys International, Inc.
InventorsPasupathy Ganesan, Gaylord D. Smith, Curtis S. Tassen, Jack M. Wheeler
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Abstract
An oxidation resistant nickel-chromium based alloy possessing good stress rupture characteristics at elevated temperature and, in addition to nickel and chromium, containing correlated percentages of aluminum, titanium, nitrogen, carbon, etc.
Claims20
A high nickel-chromium alloy characterized by (a) enhanced resistance to oxidation at elevated temperature, (b) good stress rupture life at such temperatures, and (c) a controlled grain size, said alloy consisting essentially of about 55 to 65% nickel, about 19 to 28% chromium, about 0.75 to 2% aluminum, about 0.2 to 1% titanium, about 0.04 to 0.1% nitrogen, up to about 0.1% carbon, up to 1% each of silicon, molybdenum, manganese and niobium, up to 0.1% boron, and the balance essentially iron.
A high nickel-chromium alloy characterized by (a) enhanced resistance to oxidation at elevated temperature, (b) good stress rupture life at such temperatures, and (c) a controlled grain size, said alloy consisting essentially of about 55 to 65% nickel, about 19 to 28% chromium, about 0.75% to 2% aluminum, about 0.2 to 1% titanium, about 0.035 to 0.1% nitrogen, up to about 0.1% carbon, from 0.2 to 1.5% silicon, and the balance essentially iron, said alloy being further characterized by a relatively stable microstructure having titanium nitrides substantially uniformly distributed throughout the grains and grain boundaries and with the average grain size not exceeding about 15 mils.
Dependencies are inferred from the claim text.