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US4761267A
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Aluminum alloy for use as core of clad material
Assignee: Sky Aluminium Co Ltd
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Filing: 1987-02-03
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Granted: 1988-08-02
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Expires: 2007-02-03
Abstract
Abstract An aluminum alloy-core material for brazing, having improved secular corrosion resistance is provided, by a composition of 0.5 DIFFERENCE 1.0% of Cu, 0.5 DIFFERENCE 1.0% of Mn, 0.10 DIFFERENCE 0.30% of Ti, 0.3% or less of Fe, less than 0.10% of Si, and balance of Al, and contains, occasionally at least one element selected from the group consisting of from 0.05 to 0.4% of Mg, from 0.05 to 0.4% of Cr, and from 0.05 to 0.4% of Zr. The alloy is free of an Al-Fe intermetallic compound, has an improved resistance to pitting corrosion and exhibits only a slight reduction in mechanical strength after brazing.
Inventors
- 👤 Shinji Takeno
- 👤 Seishi Nakamoto
- 👤 Kouhei Oono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:42
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/0238; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
An aluminum alloy-core material for brazing, having an improved secular corrosion resistance due to a sacrificial anode or a filler metal, when used in the manufacture of brazed assemblies, which consists of 0.5˜1.0% of Cu, 0.6˜1.0% of Mn, 0.10˜0.30% of Ti, or less of Fe, less than 0.10% of Si, and balance of Al, which exhibits only a slight reduction in mechanical strength after brazing, and, in which any Fe-containing intermetallic compound of Al further contains Mn, thereby rendering said material resistant against pitting corrosion.
Claim 2
Dependent Claim
85 words
An aluminum alloy-core material for brazing, having an improved secular corrosion resistance due to a sacrificial anode or a filler metal, when used in the manufacture of brazed assemblies, which consists of 0.5˜1.0% of Cu, 0.6˜1.0% of Mn, 0.10˜0.30% of Ti, or less of Fe, less than 0.10% of Si, and balance of Al, which exhibits only a slight reduction in mechanical strength after brazing, and, in which any Fe-containing intermetallic compound of Al further contains Mn, thereby rendering said material resistant against pitting corrosion.
Claim 3
Dependent Claim
15 words
An aluminum alloy according to claim 1, wherein the Fe content is at least 0.1%.
Claim 4
Dependent Claim
26 words
An aluminum alloy according to claim 1 or 2, wherein said alloy has a tensile strength of 12 kgf/mm 2 or more after heating for brazing.
Claim 5
Dependent Claim
17 words
An aluminum alloy according to claim 1 or 2, wherein the Mn content is 0.8% at maximum.
Claim 6
Dependent Claim
115 words
An aluminum alloy-core material for brazing, having an improved secular corrosion resistance due to a sacrificial anode or a filler metal, when used in the manufacture of brazed assemblies, which consists of 0.5˜1.0% of Cu, 0.6˜1.0% of Mn, 0.10˜0.30% of Ti, 0.3% or less of Fe, less than 0.10% of Si, at least one element selected from the group consisting of from 0.05 to 0.4% of Mg, from 0.05 to 0.4% of Cr, and from 0.05 to 0.4% of Zr, and balance of Al, which exhibits only a slight reduction in mechanical strength after brazing and, in which any Fe-containing intermetallic compound of Al further contains Mn, thereby rendering said material resistant against pitting corrosion.
Claim 7
Dependent Claim
115 words
An aluminum alloy-core material for brazing, having an improved secular corrosion resistance due to a sacrificial anode or a filler metal, when used in the manufacture of brazed assemblies, which consists of 0.5˜1.0% of Cu, 0.6˜1.0% of Mn, 0.10˜0.30% of Ti, 0.3% or less of Fe, less than 0.10% of Si, at least one element selected from the group consisting of from 0.05 to 0.4% of Mg, from 0.05 to 0.4% of Cr, and from 0.05 to 0.4% of Zr, and balance of Al, which exhibits only a slight reduction in mechanical strength after brazing and, in which any Fe-containing intermetallic compound of Al further contains Mn, thereby rendering said material resistant against pitting corrosion.
Claim 8
Dependent Claim
15 words
An aluminum alloy according to claim 5, wherein the Fe content is at least 0.1%.
Claim 9
Dependent Claim
26 words
An aluminum alloy according to claim 5 or 6, wherein said alloy has a tensile strength of 12 kgf/mm 2 or more after heating for brazing.
Claim 10
Dependent Claim
17 words
An aluminum alloy according to claim 5 or 6, wherein the Mn content is 0.8% at maximum.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
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