US4460542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron-bearing nickel-chromium-aluminum-yttrium alloy
Assignee: Haynes International Inc
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Filing: 1982-05-24
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Granted: 1984-07-17
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Expires: 2002-05-24
Abstract
Abstract A high temperature oxidation resistant alloy. The alloy consists essentially of, by weight, from 14 to 18% chromium, from 4 to 6% aluminum, from 1.5 to 8% iron, a small but effective yttrium content not exceeding 0.04%, up to 12% cobalt, up to 1% manganese, up to 1% molybdenum, up to 1% silicon, up to 0.25% carbon, up to 0.03% boron, up to 1% tungsten, up to 1% tantalum, up to 0.5% titanium, up to 0.5% hafnium, up to 0.5% rhenium, up to 0.04% of elements from the group consisting of elements 57 through 71 of the periodic table of the elements, balance essentially nickel. The nickel plus the cobalt content is at least 66%. The iron content is in accordance with the relationship, Fe ≧3+4 (%Al-5), when the aluminum content is at least 5%.
Inventors
- 👤 Robert B. Herchenroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A high temperature oxidation resistant alloy of improved workability consisting essentially of, by weight, from 14 to 18% chromium, from 4 to 6% aluminum, from 2 to 6% iron, a small but effective yttrium content not exceeding 0.04% to promote oxidation resistance, up to 12% cobalt, up to 1% manganese, up to 1% molybdenum, up to 1% silicon, up to 0.25% carbon, up to 0.03% boron, up to 1% tungsten, up to 1% tantalum, up to 0.5% titanium, up to 0.5% hafnium, up to 0.5% rhenium, up to 0.04% of elements from the group consisting of elements 57 through 71 of the periodic table of the elements, balance essentially nickel; said nickel plus said cobalt being at least 66%.
Claim 2
Dependent Claim
119 words
A high temperature oxidation resistant alloy of improved workability consisting essentially of, by weight, from 14 to 18% chromium, from 4 to 6% aluminum, from 2 to 6% iron, a small but effective yttrium content not exceeding 0.04% to promote oxidation resistance, up to 12% cobalt, up to 1% manganese, up to 1% molybdenum, up to 1% silicon, up to 0.25% carbon, up to 0.03% boron, up to 1% tungsten, up to 1% tantalum, up to 0.5% titanium, up to 0.5% hafnium, up to 0.5% rhenium, up to 0.04% of elements from the group consisting of elements 57 through 71 of the periodic table of the elements, balance essentially nickel; said nickel plus said cobalt being at least 66%.
Claim 3
Dependent Claim
12 words
An alloy according to claim 1, having from 15 to 17% chromium.
Claim 4
Dependent Claim
12 words
An alloy according to claim 1, having from 4.1 to 5.1% aluminum.
Claim 5
Dependent Claim
16 words
An alloy according to claim 1, having a nickel plus cobalt content of at least 71%.
Claim 6
Dependent Claim
27 words
An alloy according to claim 1, having from 15 to 17% chromium, from 4.1 to 5.1% aluminum and a nickel plus cobalt content of at least 71%.
Claim 7
Dependent Claim
11 words
An alloy according to claim 1, having less than 2% cobalt.
Claim 8
Dependent Claim
16 words
An alloy according to claim 1, having less than 0.1% carbon and less than 0.015% boron.
Claim 9
Dependent Claim
16 words
An alloy according to claim 1, having at least 5% aluminum and at least 3% iron.
Claim 10
Dependent Claim
18 words
An alloy according to claim 8, wherein said iron content is in accordance with the relationship Fe≧3+4 (%Al-5).
Claim 11
Dependent Claim
16 words
An alloy according to claim 1, having a molybdenum plus tungsten content of less than 1%.
Claim 12
Dependent Claim
10 words
A wrought article made from the alloy of claim 1.
Claim 13
Dependent Claim
16 words
An article for use as hardware in ceramic kilns, made from the alloy of claim 1.
Claim 14
Dependent Claim
17 words
An article for use as hardware in heat treating furnaces, made from the alloy of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |