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AssigneeInco Alloys International, Inc.
InventorsHerbert L. Eiselstein, Jerry A. Harris, Darrell F. Smith, Jr., Edward F. Clatworthy, Stephen Floreen, Jeffrey M. Davidson
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Nickel-base alloys containing special and correlated percentages of chromium, iron, molybdenum, titanium, columbium, aluminum etc. (i) provide an attractive combination of strength, ductility, resistance to environmental media and other desirable characteristics, (ii) can be processed by cold working and age hardening to achieve yield strengths of 150,000 psi (1034 MPa) to 200,000 psi (1379 MPa) together with tensile elongations of 10% to 20%, (iii) are resistant to such corrosive media as hydrogen sulphide and acid chloride solutions, and to hydrogen embittlement, and (iv) are useful for, inter alia, petroleum production tubing and sulfur dioxide gas scrubber applications.
A nickel-base alloy characterized by good workability and fabricability and further characterized in both the cold-rolled and aged conditions by high strength, good ductility and resistance to pitting, hydrogen embrittlement and stress-corrosion cracking said alloy consisting essentially of, in weight percent, about 15 to 25% chromium, about 5 to about 15% iron, about 6.5 to 9% molybdenum, about 2.5 to 5% columbium, from 0.5 to 2.5% titanium with the proviso that when the titanium is less than 1% the columbium is at least 3.5%, up to about 0.5% aluminum and the balance nickel with nickel constituting about 50 to about 60% of the alloy.
A nickel-chromium-iron base alloy characterized by good workability and fabricability and further characterized in the aged condition by high strength, good ductility and resistance to pitting, hydrogen embrittlement and stress-corrosion cracking, said alloy consisting essentially of about 15% to 22% chromium, about 10% to 28% iron, about 6% to 9% molybdenum, about 2.5% to 5% columbium, about 1% to about 2% titanium, about 0.05% to about 0.5% aluminum and the balance essentially nickel in a weight proportion of about 45% to about 55% of said alloy, said alloy being devoid of deleterious Laves phase.
A nickel-chromium-iron base alloy characterized by good workability and fabricability and further characterized in the aged condition by high strength, good ductility and resistance in pitting, hydrogen embrittlement and stress-corrosion cracking, said alloy consisting essentially of from 15% to about 25% chromium, about 5% to about 15% iron, about 6.5% to 9% molybdenum, about 2.5 to 5% columbium, from 0.5 to 2.5% titanium, with the proviso that when the titanium is below 1% the columbium is at least 3.5%, up to about 0.5% aluminum and the balance nickel, the nickel being from about 45% to about 55% of said alloy.
A nickel-base alloy characterized by good workability and fabricability and further characterized in both the cold-rolled and aged conditions by high strength, good ductility and resistance to pitting, hydrogen embrittlement and stress corrosion cracking, said alloy consisting essentially of, in weight percent, about 18.5 to about 22% chromium, from 5 to 15% iron, from 6.5 to 9% molybdenum, from 3 to 4.5% columbium, the molybdenum and columbium being correlated such that when the molybdenum exceeds 7% the columbium is not greater than about 4%, about 1 to 2.5% titanium, up to 0.5% aluminum and about 52 to less than 60% nickel in which the nickel, molybdenum, chromium and columbium are correlated to satisfy the following relationship:
Dependencies are inferred from the claim text.