US4043810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast thermally stable high temperature nickel-base alloys and casting made therefrom
Assignee: Haynes International Inc
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Filing: 1975-12-29
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Granted: 1977-08-23
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Expires: 1995-12-29
Abstract
Abstract A cast thermally stable high temperature nickel-base alloy characterized by superior oxidation resistance, sustainable hot strength and retention of ductility on aging is provided by maintaining the alloy chemistry within the composition molybdenum 13.7% to 15.5%; chromium 14.7% to 16.5%; carbon up to 0.1%, lanthanum in an effective amount to provide oxidation resistance up to 0.08%; boron up to 0.015%; manganese 0.3% to 1.0%; silicon 0.2% to 0.8; cobalt up to 2.0%; iron up to 3.0%; tungsten up to 1.0%; copper up to 0.4%; phosphorous up to 0.02%; sulfur up to 0.015%; aluminum 0.1% to 0.5% and the balance nickel while maintaining the Nv number less than 2.31.
Inventors
- 👤 Dennis A. Acuncius
- 👤 Robert B. Herchenroeder
- 👤 Russell W. Kirchner
- 👤 William L. Silence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:12
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A cast thermally stable high temperature alloy characterized by superior oxidation resistance, sustainable high hot strength and retention of ductility on aging consisting essentially by weight of: Mo: 13.7% to 15.5% Cr: 14.7% to 16.5% C: up to 0.1% La: An effective amount to produce oxidation resistance up to 0.08% B: up to 0.015% Mn: 0.3% to 1.0% Si: 0.2% to 0.75% Co: Up to 2.0% Fe: Up to 3.0% W: up to 1.0% Cu: Up to 0.35% P: up to 0.02% S: up to 0.015% Al: 0.1% to 0.5% Ni: Balance said alloy having an Nv number less than 2.31.
Claim 2
Dependent Claim
101 words
A cast thermally stable high temperature alloy characterized by superior oxidation resistance, sustainable high hot strength and retention of ductility on aging consisting essentially by weight of: Mo: 13.7% to 15.5% Cr: 14.7% to 16.5% C: up to 0.1% La: An effective amount to produce oxidation resistance up to 0.08% B: up to 0.015% Mn: 0.3% to 1.0% Si: 0.2% to 0.75% Co: Up to 2.0% Fe: Up to 3.0% W: up to 1.0% Cu: Up to 0.35% P: up to 0.02% S: up to 0.015% Al: 0.1% to 0.5% Ni: Balance said alloy having an Nv number less than 2.31.
Claim 3
Dependent Claim
13 words
A cast alloy as claimed in claim 1 having up to 0.02% carbon.
Claim 4
Dependent Claim
70 words
A cast alloy as claimed in claim 1 wherein the composition consists essentially of: Mo: about 14.0% Cr: about 15.5% C: lap la: about 0.04% B: about 0.01% Mn: about 0.5% Si: about 0.4% Co: LAP Fe: LAP W: lap cu: LAP P: lap s: lap al: about 0.25% Ni: Balance said alloy having an Nv number as close to 2.28 as possible but within the range 2.23 to 2.31.
Claim 5
Dependent Claim
109 words
A nickel base alloy casting made from an alloy consisting essentially of: Mo: 13.7% to 15.5% Cr: 14.7% to 16.5% C: up to 0.1% La: An effective amount to produce oxidation resistance up to 0.08% B: up to 0.015% Mn: 0.3% to 1.0% Si: 0.2% to 0.75% Co: Up to 2.0% Fe: Up to 3.0% W: up to 1.0% Cu: Up to 0.35% P: up to 0.02% S: up to 0.015% Al: 0.1% to 0.5% Ni: Balance said alloy having an Nv number less than 2.31, said casting characterized by thermal stability resistance to oxidation at temperatures above 1600° F., sustainable hot strength and retention of ductility on aging.
Claim 6
Dependent Claim
109 words
A nickel base alloy casting made from an alloy consisting essentially of: Mo: 13.7% to 15.5% Cr: 14.7% to 16.5% C: up to 0.1% La: An effective amount to produce oxidation resistance up to 0.08% B: up to 0.015% Mn: 0.3% to 1.0% Si: 0.2% to 0.75% Co: Up to 2.0% Fe: Up to 3.0% W: up to 1.0% Cu: Up to 0.35% P: up to 0.02% S: up to 0.015% Al: 0.1% to 0.5% Ni: Balance said alloy having an Nv number less than 2.31, said casting characterized by thermal stability resistance to oxidation at temperatures above 1600° F., sustainable hot strength and retention of ductility on aging.
Claim 7
Dependent Claim
15 words
A nickel base alloy casting as claimed in claim 4 having up to 0.02% carbon.
Claim 8
Dependent Claim
73 words
A nickel base alloy casting as claimed in claim 4 made from an alloy consisting essentially of: Mo: about 14.0% Cr: about 15.5% C: lap la: about 0.04% B: about 0.01% Mn: about 0.5% Si: about 0.4% Co: LAP Fe: LAP W: lap cu: LAP P: lap s: lap al: about 0.25% Ni: Balance said alloy having an Nv number as close to 2.28 as possible but within the range 2.23 to 2.31.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |