EP0273600A2
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EP
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Aluminum-lithium alloys
Assignee: Rio Tinto Aluminium Ltd
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Filing: 1987-12-01
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Granted: —
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Expires: 2007-12-01
Abstract
Abstract A group of alloys, based on aluminum and containing: about 1.0 to 2.8% lithium; an alloying element selected from about 2.5 to 7.0% magnesium or about 4.0 to 7.0% copper and less than about 1.0% of at least one additive element selected from zirconium, chromium, and manganese. These alloys have an improved combination of properties such as strength, ductility and weldability and in some cases improved tensile properties at cryogenic temperatures.
Inventors
- 👤 K. Sharvan Kumar
- 👤 Joseph Robert Pickens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 10:25
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; C22C21/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
47 words
A metal alloy comprising aluminum base metal; about 1.0 to 2.8% lithium alloying element; an alloying element selected from about 2.5 to 7.0% magnesium or about 4.0 to 7.0% copper and less than about 1.0% of at least one additive element selected from zirconium, chromium, and manganese.
Claim 2
Dependent Claim
47 words
A metal alloy comprising aluminum base metal; about 1.0 to 2.8% lithium alloying element; an alloying element selected from about 2.5 to 7.0% magnesium or about 4.0 to 7.0% copper and less than about 1.0% of at least one additive element selected from zirconium, chromium, and manganese.
Claim 3
Dependent Claim
19 words
An alloy of claim 1 wherein there is about 1.0 to 2.8% lithium and about 2.5 to 4.0% magnesium.
Claim 4
Dependent Claim
19 words
An alloy of claim 1 wherein there is about 1.0 to 1.5% lithium and about 4.0 to 7.0% magnesium.
Claim 5
Dependent Claim
24 words
An alloy of claim 1 wherein there is about 1.0 to 1.5% lithium; about 4.0 to 7.0% copper; and, about 0.01 to 0.20% zirconium.
Claim 6
Dependent Claim
12 words
An alloy of claim 2 further including about 0.01 to 0.20% zirconium.
Claim 7
Dependent Claim
12 words
An alloy of claim 5, further including about 0.01 to 0.30% chromium.
Claim 8
Dependent Claim
15 words
An alloy of claim 4 or claim 7, wherein there is 0.05 to 0.7% manganese.
Claim 9
Dependent Claim
19 words
An alloy of claim 3 wherein there is about .01 to 0.2% manganese and about 0.01 to 0.3% chromium.
Claim 10
Dependent Claim
16 words
An alloy of claim 3 or claim 8 wherein there is about .01 to 0.2% zirconium.
Claim 11
Dependent Claim
33 words
An alloy comprising aluminum base metal, about 1.25 to 2.75% lithium; about 3.00 to 5.00% magnesium; and less than about 1.00% of at least one additive element selected from zirconium, manganese and chromium.
Claim 12
Dependent Claim
33 words
An alloy comprising aluminum base metal, about 1.25 to 2.75% lithium; about 3.00 to 5.00% magnesium; and less than about 1.00% of at least one additive element selected from zirconium, manganese and chromium.
Claim 13
Dependent Claim
10 words
An alloy comprising lithium 2.7, magnesium 3.1, and zirconium 0.1.
Claim 14
Dependent Claim
10 words
An alloy comprising lithium 2.7, magnesium 3.1, and zirconium 0.1.
Claim 15
Dependent Claim
14 words
An alloy comprising lithium 2.6, magnesium 3.2, zirconium 0.1, chromium 0.1, and manganese 0.4.
Claim 16
Dependent Claim
14 words
An alloy comprising lithium 2.6, magnesium 3.2, zirconium 0.1, chromium 0.1, and manganese 0.4.
Claim 17
Dependent Claim
12 words
An alloy comprising lithium 1.7. magnesium, 4.6, chromium 0.1 and manganese 0.4.
Claim 18
Dependent Claim
12 words
An alloy comprising lithium 1.7. magnesium, 4.6, chromium 0.1 and manganese 0.4.
Claim 19
Dependent Claim
10 words
An alloy comprising lithium 1.77, magnesium 4.5, and zirconium 0.1.
Claim 20
Dependent Claim
10 words
An alloy comprising lithium 1.77, magnesium 4.5, and zirconium 0.1.
Claim 21
Dependent Claim
14 words
An alloy comprising lithium 2.7, magnesium 4.6, zirconium 0.1, chromium 0.1, and manganese 0.4.
Claim 22
Dependent Claim
14 words
An alloy comprising lithium 2.7, magnesium 4.6, zirconium 0.1, chromium 0.1, and manganese 0.4.
Claim 23
Dependent Claim
12 words
An alloy comprising lithium 1.4, copper 6.0, zirconium 0.1, and manganese 0.4.
Claim 24
Dependent Claim
12 words
An alloy comprising lithium 1.4, copper 6.0, zirconium 0.1, and manganese 0.4.
Claim 25
Dependent Claim
12 words
An alloy comprising lithium 2.2, magnesium 3.0, zirconium 0.1, and chromium 0.1.
Claim 26
Dependent Claim
12 words
An alloy comprising lithium 2.2, magnesium 3.0, zirconium 0.1, and chromium 0.1.
Claim 27
Dependent Claim
10 words
An alloy comprising lithium 1.4, magnesium 4.5, and zirconium 0.1.
Claim 28
Dependent Claim
10 words
An alloy comprising lithium 1.4, magnesium 4.5, and zirconium 0.1.
References Cited (Backward Citations)
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