US4066448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-chromium-cobalt containing alloys
Assignee: Huntington Alloys Corp
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Filing: 1976-04-07
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Granted: 1978-01-03
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Expires: 1996-04-07
Abstract
Abstract High-chromium nickel alloys containing special amounts of cobalt and other ingredients are found to afford a good combination of both hot and cold workability, together with corrosion resistance, stability and high temperature stress rupture characteristics.
Inventors
- 👤 Ronald Mason Haeberle, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:51
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; C22C27/00; C22C27/06; C22C30/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A high chromium, nickel-cobalt alloy characterized by good (i) hot and cold workability notwithstanding the chromium levels, (ii) stress-rupture strength at high temperatures, (iii) hot corrosion resistance to the combustion products of low-grade fuels, and (iv) stability at elevated temperature, said alloy consisting essentially of from 35 to about 45% chromium, about 42.5 to 55% nickel, from 2.5 to about 20% cobalt, the percentages of chromium, nickel and cobalt being correlated to represent a point on the area JHDEGJ of the accompanying drawing, titanium in a small but effective amount to improve workability or tie up nitrogen and up to about 1.5%, carbon in an amount up to about 0.1%, and up to about 0.75% aluminum.
Claim 2
Dependent Claim
116 words
A high chromium, nickel-cobalt alloy characterized by good (i) hot and cold workability notwithstanding the chromium levels, (ii) stress-rupture strength at high temperatures, (iii) hot corrosion resistance to the combustion products of low-grade fuels, and (iv) stability at elevated temperature, said alloy consisting essentially of from 35 to about 45% chromium, about 42.5 to 55% nickel, from 2.5 to about 20% cobalt, the percentages of chromium, nickel and cobalt being correlated to represent a point on the area JHDEGJ of the accompanying drawing, titanium in a small but effective amount to improve workability or tie up nitrogen and up to about 1.5%, carbon in an amount up to about 0.1%, and up to about 0.75% aluminum.
Claim 3
Dependent Claim
26 words
The alloy of claim 1 in which the chromium, nickel and cobalt are correlated to represent a point within the area KHDEFK of the accompanying drawing.
Claim 4
Dependent Claim
10 words
The alloy of claim 2 having a substantially gamma morphology.
Claim 5
Dependent Claim
21 words
The alloy of claim 2 in which the cobalt is at least 5% and the aluminum does not exceed about 0.5%.
Claim 6
Dependent Claim
17 words
The alloy of claim 2 in which chromium plus 0.6 times the cobalt is at least 45%.
Claim 7
Dependent Claim
14 words
The alloy of claim 4 in which the cobalt is from 7.5 to 18%.
Claim 8
Dependent Claim
31 words
The alloy of claim 1 in which the nickel is 44 to 46% and the chromium plus cobalt is about 56 to 54% with the chromium being from 45 to 37%.
Claim 9
Dependent Claim
59 words
An alloy consisting essentially of 35 to 47.5% chromium, about 42.5% to 55% nickel, about 2.5 to 21% cobalt, titanium present to improve workability or tie up nitrogen up to 1.5%, up to 0.25% carbon, and up to 2% aluminum, the chromium, nickel and cobalt being correlated to represent a point within the area ACDEGA of the accompanying drawing.
Claim 10
Dependent Claim
59 words
An alloy consisting essentially of 35 to 47.5% chromium, about 42.5% to 55% nickel, about 2.5 to 21% cobalt, titanium present to improve workability or tie up nitrogen up to 1.5%, up to 0.25% carbon, and up to 2% aluminum, the chromium, nickel and cobalt being correlated to represent a point within the area ACDEGA of the accompanying drawing.
References Cited (Backward Citations)
US2809139A
Cited
US3519419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |