US4167410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy for use in brazed assemblies
Assignee: Rio Tinto Switzerland AG
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Filing: 1978-02-24
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Granted: 1979-09-11
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Expires: 1998-02-24
Abstract
Abstract An improved corrosion resistant aluminum alloy for use in the manufacture of brazed assemblies having improved sag resistant properties is disclosed. The alloy consists essentially of an aluminum base alloy containing from 0.05 to 0.4% chromium, from 0.02 to 0.9% manganese, up to 0.2% iron, up to 0.1% silicon and the balance essentially aluminum.
Inventors
- 👤 William H. Anthony
- 👤 James M. Popplewell
- 👤 Andrew J. Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:20
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
An improved corrosion resistant aluminum alloy exhibiting improved sag resistant properties when used in the manufacture of brazed assemblies, said alloy consisting essentially of not less than 0.15% and not more than 0.40% chromium, not less than 0.2% and not more than 0.9% manganese, up to 0.2% iron, up to 0.1% silicon, balance essentially aluminum.
Claim 2
Dependent Claim
55 words
An improved corrosion resistant aluminum alloy exhibiting improved sag resistant properties when used in the manufacture of brazed assemblies, said alloy consisting essentially of not less than 0.15% and not more than 0.40% chromium, not less than 0.2% and not more than 0.9% manganese, up to 0.2% iron, up to 0.1% silicon, balance essentially aluminum.
Claim 3
Dependent Claim
55 words
A brazed article exhibiting improved sag resistant properties and having superior corrosion resistant properties in aqueous environments comprising an aluminum alloy consisting essentially of not less than 0.15% and not more than 0.40% chromium, not less than 0.2% and not more than 0.9% manganese, up to 0.2% iron, up to 0.1% silicon, balance essentially aluminum.
Claim 4
Dependent Claim
55 words
A brazed article exhibiting improved sag resistant properties and having superior corrosion resistant properties in aqueous environments comprising an aluminum alloy consisting essentially of not less than 0.15% and not more than 0.40% chromium, not less than 0.2% and not more than 0.9% manganese, up to 0.2% iron, up to 0.1% silicon, balance essentially aluminum.
Claim 5
Dependent Claim
22 words
An aluminum alloy according to claim 1 wherein said alloy contains reduced size and population density of second phase iron containing particles.
Claim 6
Dependent Claim
19 words
An aluminum alloy according to claim 1 wherein said alloy is substantially free from highly cathodic FeAl 3 phase.
Claim 7
Dependent Claim
15 words
An aluminum alloy according to claim 1 wherein said alloy contains up to 0.1% iron.
References Cited (Backward Citations)
US1830142A
Cited
US3878871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |