US4788037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength, corrosion-resistant aluminum alloys for brazing
Assignee: Kobe Steel Ltd
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Filing: 1986-07-15
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Granted: 1988-11-29
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Expires: 2006-07-15
Abstract
Abstract A high strength, corrosion-resistant alloy for brazing is disclosed, which alloy comprises 0.2-1.0 wt % of Cu 0.1-0.5 wt % of Mg, 0.2-1.0 wt % of Si, and the balance of Al and inevitably present impurities. The weight ratio of Si/Mg is in the range of 1-2.5:1. The alloy may further comprise 0.05-0.5 wt % of Ni and/or one or more of Zr, Cr and Mn each in an amount of 0.05-0.5 wt %.
Inventors
- 👤 Masaharu Kaifu
- 👤 Jun Takigawa
- 👤 Hideo Fujimoto
- 👤 Tomohiro Nishimura
- 👤 Masao Takemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:28
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A high strength, corrosion-resistant alloy for brazing which consists essentially of 0.3-1.0 wt. % of Cu, 0.1-0.5 wt. % of Mg, 0.2-1.0 wt. % of Si, and one or more of Zr, Cr and Mn each in the amount of 0.15-0.3 wt. %, and the balance of Al and inevitably present impurities, with the weight ratio of Si/Mg being in the range of 1-2.5.
Claim 2
Dependent Claim
64 words
A high strength, corrosion-resistant alloy for brazing which consists essentially of 0.3-1.0 wt. % of Cu, 0.1-0.5 wt. % of Mg, 0.2-1.0 wt. % of Si, and one or more of Zr, Cr and Mn each in the amount of 0.15-0.3 wt. %, and the balance of Al and inevitably present impurities, with the weight ratio of Si/Mg being in the range of 1-2.5.
Claim 3
Dependent Claim
63 words
A high strength, corrosion-resistant alloy for brazing which consists essentially of 0.2-1.0 wt.% of Cu, 0.1-0.5 wt.% of Mg, 0.2-1.0 wt.% of Si, one or more of Zr, Cr and Mn each in the amount of 0.05-0.5 wt.%, 0.05-0.5 wt.% of Ni, and the balance of Al and inevitably present impurities, with the weight ratio of Si/Mg being in the range of 1-2.5.
Claim 4
Dependent Claim
63 words
A high strength, corrosion-resistant alloy for brazing which consists essentially of 0.2-1.0 wt.% of Cu, 0.1-0.5 wt.% of Mg, 0.2-1.0 wt.% of Si, one or more of Zr, Cr and Mn each in the amount of 0.05-0.5 wt.%, 0.05-0.5 wt.% of Ni, and the balance of Al and inevitably present impurities, with the weight ratio of Si/Mg being in the range of 1-2.5.
Claim 5
Dependent Claim
44 words
The high strength, corrosion-resistant alloy according to claim 1, wherein the content of Cu is in the range of 0.3-0.9 wt%, the content of Mg is in the range of 0.1-0.45 wt%, and the weight ratio of Si/Mg is in the range of 1.25-2.5.
Claim 6
Dependent Claim
21 words
The high strength, corrosion-resistant alloy according to claim 3, wherein the weight ratio of Si/Mg is in the range of 1.3-2.3.
Claim 7
Dependent Claim
16 words
The high strength, corrosion-resistant alloy according to claim 2, further comprising up to 0.1% of Ti.
Claim 8
Dependent Claim
19 words
The high strength, corrosion-resistant alloy according to claim 2, wherein said Si/Mg ratio is in the range of 1.3-2.3.
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |