EP0088511A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in or relating to aluminium alloys
Assignee: Qinetiq Ltd
•
Filing: 1983-02-01
•
Granted: —
•
Expires: 2003-02-01
Abstract
Abstract Aluminium alloys having compositions within the ranges (in wt%) 2 to 2.8 lithium - 0.4 to 1 magnesium - 1 to 1.5 copper - 0 to 0.2 zirconium - 0 to 0.5 manganese - 0 to 0.5 nickel - 0 to 0.5 chromium - balance aluminium. The alloys are precipitation hardenable and exhibit a range of properties, according to heat treatment, which make them suitable for engineering applications where light weight and high strength are required.
Inventors
- 👤 Brian Evans
- 👤 Christopher John Peel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:07
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
An aluminium alloy characterised in that the composition lies within the ranges expressed below in weight per cent; Lithium 2.0 to 2.8 Magnesium 0.4 to 1.0 Copper 1.0 to 1.5 Zirconium 0 to 0.2 Manganese 0 to 0.5 Nickel 0 to 0.5 Chromium 0 to 0.5 Aluminium Balance (except for incidental impurities)
Claim 2
Dependent Claim
52 words
An aluminium alloy characterised in that the composition lies within the ranges expressed below in weight per cent; Lithium 2.0 to 2.8 Magnesium 0.4 to 1.0 Copper 1.0 to 1.5 Zirconium 0 to 0.2 Manganese 0 to 0.5 Nickel 0 to 0.5 Chromium 0 to 0.5 Aluminium Balance (except for incidental impurities)
Claim 3
Dependent Claim
18 words
An aluminium alloy according to claim 1 characterised in that it is produced by an ingot metallurgy route.
Claim 4
Dependent Claim
24 words
An aluminium alloy according to claim 1 characterised in that it has a magnesium content in the range 0.7 to 1.0 weight per cent.
Claim 5
Dependent Claim
18 words
An aerospace airframe structure characterised in that it is produced from an aluminium alloy according to claim 1.
References Cited (Backward Citations)
FR518023A
Cited
CH216204A
Cited
FR1148719A
Cited
FR1161306A
Cited
US2915390A
Cited
US2915391A
Cited
GB1172736A
Cited
DE1927500A1
Cited
DE2127909A1
Cited
FR2190930A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.