US3663213A
Expired / Lapsed
US
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Nickel-chromium-iron alloy
Assignee: Huntington Alloys Corp
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Filing: 1970-05-11
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Granted: 1972-05-16
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Expires: 1990-05-11
Abstract
Abstract A strongly age-hardenable alloy having low annealed base hardness, high strength in the aged condition, excellent weldability and unexpectedly good machinability contains about 35 percent to about 46 percent nickel, about 12 percent to about 20 percent chromium, about 1.25 percent to about 2.5 percent titanium, about 2.25 percent to about 3.5 percent columbium, up to about 0.08 percent carbon, about 0.0005 percent to about 0.006 percent boron, about 0.05 percent to about 1 percent aluminum and the balance essentially iron.
Inventors
- 👤 Herbert Louis Eiselstein
- 👤 Edward Frederick Clatworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:20
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
An alloy according to claim 1 wherein the nickel content does not exceed about 45 percent and the chromium content does not exceed about 18 percent.
Claim 2
Dependent Claim
47 words
An alloy according to claim 1 containing about 14.5 percent to about 17.5 percent chromium, about 39 percent to about 44 percent nickel, about 1.5 percent to about 2 percent titanium, about 2.5 percent to about 3 percent columbium, and not more than about 0.5 percent aluminum.
Claim 3
Dependent Claim
16 words
An alloy according to claim 3 wherein the carbon content does not exceed about 0.06 percent.
Claim 4
Dependent Claim
18 words
An alloy according to claim 3 wherein the aluminum content is about 0.1 percent to about 0.4 percent.
Claim 5
Dependent Claim
18 words
An alloy according to claim 1 wherein the boron content is about 0.001 percent to about 0.005 percent.
Claim 6
Dependent Claim
18 words
An alloy in accordance with claim 3 wherein the aluminum is about 0.2 percent to about 0.45 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |