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US4063934A
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Heat resisting nickel-chromium alloy having high resistance to oxidation, carburization and creep at high temperatures
Assignee: Aciers Du Manoir-Pompey Soc
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Filing: 1976-02-24
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Granted: 1977-12-20
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Expires: 1996-02-24
Abstract
Abstract The heat resisting alloy of the invention has a high resistance to oxidation, carburization and creep at very high temperatures; its composition is as follows (in % by weight): ______________________________________ Ni 24 - 53 Cr 20 - 44 C 0.01 - 0.6 Mn 0.1 - 1.5 Si 1.3 - 3 Nb 0.5 - 3 N 0.05 - 0.2 (W + Mo) 0.2 - 5 Fe 0 - 47 Cu 0 - 5 ______________________________________ The minimum copper content in case the alloy contains tungsten and less than 40% nickel is at least 0.1%; the Ni/Cr ratio is between 1.20 and 1.40.
Inventors
- 👤 Jacques Thuillier
- 👤 Michel Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:21
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/052
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
92 words
Heat resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 24 - 53 %
Cr 20 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo) 0.2 - 5 %
Fe 0 - 47 %
Cu 0.1 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 2
Dependent Claim
92 words
Heat resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 24 - 53 %
Cr 20 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo) 0.2 - 5 %
Fe 0 - 47 %
Cu 0.1 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 3
Dependent Claim
16 words
Alloy according to claim 1, wherein the carbon content is between 0.4 and 0.6% by weight.
Claim 4
Dependent Claim
21 words
Alloy according to claim 1, wherein the sum of the tungsten and molybdenum contents is between 1 and 5% by weight.
Claim 5
Dependent Claim
16 words
Alloy according to claim 1, wherein the niobium content is between 1 and 2% by weight.
Claim 6
Dependent Claim
15 words
Alloy according to claim 1, wherein its nickel content is higher than 40% by weight.
Claim 7
Dependent Claim
15 words
Alloy according to claim 1, wherein its nickel content is at least 45% by weight.
Claim 8
Dependent Claim
57 words
Alloy according to claim 1, characterized in that it consists essentially of the following composition (% by weight): ______________________________________
Ni about 32.5
Cr about 27
Nb about 1.1
W about 1.4
Cu about 1.6
C 0.01 - 0.6
Mn 0.1 - 1.5
Si 1.3 - 3
N 0.05 - 0.2
______________________________________ the balance being iron and impurities.
Claim 9
Dependent Claim
57 words
Alloy according to claim 1, characterized in that it consists essentially of the following composition (% by weight): ______________________________________
Ni about 44.6
Cr about 34
Nb about 1.1
W about 1.6
Cu about 1.7
C 0.01 - 0.6
Mn 0.1 - 1.5
Si 1.3 - 3
N 0.05 - 0.2
______________________________________ the balance being iron and impurities.
Claim 10
Dependent Claim
60 words
Alloy according to claim 1, characterized in that it consists essentially of the following composition (% by weight): ______________________________________
Ni about 50.7
Cr about 37
Cu about 4.5
W about 0.2
Mo about 0.2
Nb about 1.3
C 0.01 - 0.6
Mn 0.1 - 1.5
Si 1.3 - 3
N 0.05 - 0.2
______________________________________ the balance being iron and impurities.
Claim 11
Dependent Claim
60 words
Alloy according to claim 1, characterized in that it consists essentially of the following composition (% by weight): ______________________________________
Ni about 29
Cr about 22
Cu about 0.55
W about 1.5
Mo about 3
Nb about 2
C 0.01 - 0.6
Mn 0.1 - 1.5
Si 1.3 - 3
N 0.05 - 0.2
______________________________________ the balance being iron and impurities.
Claim 12
Dependent Claim
91 words
Heat-resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 13
Dependent Claim
91 words
Heat-resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 14
Dependent Claim
54 words
Alloy according to claim 1, characterized in that it consists essentially of the following composition (% by weight): ______________________________________
Ni about 44
Cr about 35
Nb about 1.2
W about 1.4
C 0.01 - 0.6
Mn 0.1 - 1.5
Si 1.3 - 3
N 0.05 - 0.2
______________________________________ the balance being iron and impurities.
Claim 15
Dependent Claim
92 words
Heat resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0.5 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 16
Dependent Claim
92 words
Heat resisting alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.01 - 0.6 %
Mn 0.1 - 1.5 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0.5 - 5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 17
Dependent Claim
17 words
Heat resistant alloy according to claim 1, wherein the by-weight copper proportion range is 0.5 - 5%.
Claim 18
Dependent Claim
91 words
Heat-resistant alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.4 - 0.6 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0 - 5 %
Mn 0.1 - 1.5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
Claim 19
Dependent Claim
91 words
Heat-resistant alloy having a high resistance to oxidation, carburization and creep at very high temperatures and consisting essentially of the following elements in the following by-weight proportion ranges: ______________________________________
Ni 40 - 53 %
Cr 28.6 - 44 %
C 0.4 - 0.6 %
Si 1.3 - 3 %
Nb 0.5 - 3 %
N 0.05 - 0.2 %
(W + Mo)
0.2 - 5 %
Fe 0 - 47 %
Cu 0 - 5 %
Mn 0.1 - 1.5 %
______________________________________ the Ni/Cr by-weight ratio being between 1.20 and 1.40.
References Cited (Backward Citations)
US3627516A
Cited
US3758294A
Cited
DE2135179A1
Cited
US3833358A
Cited
US3759704A
Cited
US3900316A
Cited
US3893851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |