US4649087A
Expired / Lapsed
US
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Corrosion resistant aluminum brazing sheet
Assignee: Reynolds Metals Co
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Filing: 1985-06-10
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Granted: 1987-03-10
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Expires: 2005-06-10
Abstract
Abstract An aluminum core alloy for use in the manufacture of brazed heat exchanger assemblies having high resistance to corrosion and moderate strength. A preferred composition of the aluminum base alloy consists of from 0.13 to 0.22% titanium, from 0.8 to 1.5% manganese, 0.4 to 0.6% copper, up to 0.7% iron, up to 0.3% silicon, up to 0.3% magnesium, with the balance being essentially aluminum and normal impurities. Another preferred composition, which is a modification of the preceding composition, includes 0.3 to 0.6% magnesium.
Inventors
- 👤 Darwin H. Scott
- 👤 Kenneth D. Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:00
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; B32; B32B; B32B15/00; B32B15/01; B32B15/016; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
An aluminum brazing material useful as a core alloy in a brazing product having a core alloy clad with a brazing alloy, said brazing material, by weight percent, consisting essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.4 to 0.6% copper, up to 0.7% iron, up to 0.8% silicon, up to 1.5% magnesium, with the balance being aluminum and normal impurities.
Claim 2
Dependent Claim
63 words
An aluminum brazing material useful as a core alloy in a brazing product having a core alloy clad with a brazing alloy, said brazing material, by weight percent, consisting essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.4 to 0.6% copper, up to 0.7% iron, up to 0.8% silicon, up to 1.5% magnesium, with the balance being aluminum and normal impurities.
Claim 3
Dependent Claim
15 words
The aluminum brazing material of claim 1, wherein the magnesium content is up to 0.3%.
Claim 4
Dependent Claim
16 words
The aluminum brazing material of claim 1, wherein the magnesium content is between 0.3 and 0.6%.
Claim 5
Dependent Claim
16 words
The aluminum brazing material of claim 1, wherein the titanium content is between 0.13 and 0.22%.
Claim 6
Dependent Claim
16 words
The aluminum brazing material of claim 1, wherein the titanium content is between 0.15 and 0.18%.
Claim 7
Dependent Claim
31 words
The aluminum brazing material of claim 4, wherein the manganese content is between 0.8 and 1.5%, the silicon content is up to 0.3%, and the magnesium content is up to 0.3%.
Claim 8
Dependent Claim
32 words
The aluminum brazing material of claim 4, wherein the manganese content is between 0.8 and 1.5%, the silicon content is up to 0.3%, and the magnesium content is between 0.3 and 0.6%.
Claim 9
Dependent Claim
66 words
An aluminum brazing sheet having a core alloy and a brazing alloy clad on at least one face of the core alloy, the improvement wherein said core alloy, by weight percent, consists essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.4 to 0.6% copper, up to 0.7% iron, up to 0.8% silicon, up to 1.5% magnesium, with the balance being aluminum and normal impurities.
Claim 10
Dependent Claim
66 words
An aluminum brazing sheet having a core alloy and a brazing alloy clad on at least one face of the core alloy, the improvement wherein said core alloy, by weight percent, consists essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.4 to 0.6% copper, up to 0.7% iron, up to 0.8% silicon, up to 1.5% magnesium, with the balance being aluminum and normal impurities.
Claim 11
Dependent Claim
14 words
The improvement of claim 8, wherein said core alloy includes up to 0.3% magnesium.
Claim 12
Dependent Claim
15 words
The improvement of claim 8, wherein said core alloy includes between 0.3 and 0.6% magnesium.
Claim 13
Dependent Claim
15 words
The improvement of claim 8, wherein said core alloy includes between 0.13 and 0.22% titanium.
Claim 14
Dependent Claim
15 words
The improvement of claim 8, wherein said core alloy includes between 0.15 and 0.18% titanium.
Claim 15
Dependent Claim
29 words
The improvement of claim 8, wherein said core alloy includes up to 0.3% magnesium, between 0.8 and 1.5% manganese, up to 0.3% silicon, and between 0.13 and 0.22% titanium.
Claim 16
Dependent Claim
15 words
The improvement of claim 13, wherein said core alloy includes between 0.15 and 0.18% titanium.
Claim 17
Dependent Claim
29 words
The improvement of claim 8, wherein core alloy includes between 0.3% and 0.6% magnesium, between 0.8 and 1.5% manganese, up to 0.3% silicon, and between 0.13 and 0.22% titanium.
Claim 18
Dependent Claim
15 words
The improvement of claim 15, wherein said core alloy includes between 0.15 and 0.18% titanium.
Claim 19
Dependent Claim
63 words
An aluminum brazing material useful as a core alloy in a brazing product having a core alloy clad with a brazing alloy, said brazing material, by weight percent, consisting essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.005 to 0.7% copper, up to 0.7% iron, up to 0.8% silicon, less than 0.01% magnesium, with the balance being aluminum and normal impurities.
Claim 20
Dependent Claim
63 words
An aluminum brazing material useful as a core alloy in a brazing product having a core alloy clad with a brazing alloy, said brazing material, by weight percent, consisting essentially of 0.11 to 0.30% titanium, 0.3 to 1.5% manganese, 0.005 to 0.7% copper, up to 0.7% iron, up to 0.8% silicon, less than 0.01% magnesium, with the balance being aluminum and normal impurities.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |