US4772342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0 and 250 degrees C.
Assignee: Alstom SA
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Filing: 1986-10-24
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Granted: 1988-09-20
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Expires: 2006-10-24
Abstract
Abstract A wrought Al/Cu/Mg type aluminum alloy of high strength in the temperature range between 0 and 250° C., having the following composition: Cu=5.0 to 7.0% by weight Mg=0.3 to 0.8% by weight Ag=0.2 to 1.0% by weight Mn=0.3 to 1.0% by weight Zr=0.1 to 0.25% by weight V=0.05 to 0.15% by weight Si<0.10% by weight In this artificially aged state, the yield strength (0.2% limit) reached is more than 500 MPa at room temperature, almost 400 MPa at 200° C. and about 300 MPa at 250° C. At 180° C., the creep strength is still more than 250 MPa after 500 hours.
Inventors
- 👤 Ian J. Polmear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0° and 250° C., consisting essentially of the following composition: Cu=5.0 to 7.0% by weight Mg=0.3 to 0.8% by weight Ag=0.2 to 1.0% by weight Mn=0.3 to 1.0% by weight Zr=0.1 to 0.25% by weight V=0.05 to 0.15% by weight Si<0.10% by weight Al=remainder
Claim 2
Dependent Claim
57 words
A wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0° and 250° C., consisting essentially of the following composition: Cu=5.0 to 7.0% by weight Mg=0.3 to 0.8% by weight Ag=0.2 to 1.0% by weight Mn=0.3 to 1.0% by weight Zr=0.1 to 0.25% by weight V=0.05 to 0.15% by weight Si<0.10% by weight Al=remainder
Claim 3
Dependent Claim
49 words
A wrought aluminum alloy as claimed in claim 1, consisting essentially of the following composition: Cu=5.5 to 6.5% by weight Mg=0.4 to 0.6% by weight Ag=0.2 to 0.8% by weight Mn=0.3 to 0.8% by weight Zr=0.1 to 0.2% by weight V=0.05 to 0.15% by weight Si<0.05% by weight Al=remainder
Claim 4
Dependent Claim
37 words
A wrought aluminum alloy as claimed in claim 1, consisting essentially of the following composition: Cu=6.0% by weight Mg=0.5% by weight Ag=0.4% by weight Mn=0.5% by weight Zr=0.15% by weight V=0.10% by weight Si<0.05% by weight Al=remainder
Claim 5
Dependent Claim
82 words
A wrought aluminium alloy as claimed in claim 1, which, in the state after solution annealing, quenching in cold water and artificial aging for precipitation hardening, has at room temperature a 0.2% yield strength of at least 510 MPa and an ultimate tensile strength of at least 575 MPa and, at a temperature of 200° C. after a holding time of 0.5 hour, a 0.2% yield strength of at least 390 MPa and an ultimate tensile strength of at least 405 MPa.
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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |