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US5032359A
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Ultra high strength weldable aluminum-lithium alloys
Assignee: Rio Tinto Aluminium Ltd
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Filing: 1989-03-23
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Granted: 1991-07-16
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Expires: 2009-03-23
Abstract
Abstract A family of alloys based upon aluminum-copper-magnesium-silver alloys to which lithium has been added, within specified ranges, exhibits superior ambient- and elevated-temperature strength, superior ductility at ambient and elevated temperatures, extrudability, forgeability, weldability, and an unexpected natural aging response.
Inventors
- 👤 Joseph R. Pickens
- 👤 Frank H. Heubaum
- 👤 Lawrence S. Kramer
- 👤 K. Sharvan Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:11
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 107
Claim 1
Independent Claim
85 words
An alloy consisting essentially of aluminum base metal, from about 2.0 to about 9.8 weight percent of an alloying element selected from the group consisting of copper, magnesium and mixtures thereof, said magnesium comprising at least 0.05 weight percent, from about 0.01 to about 2.0 weight percent silver, from about 0.2 to about 4.1 weight percent lithium, and from about 0.05 to about 1.0 weight percent of a grain refining additive selected from zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 2
Dependent Claim
85 words
An alloy consisting essentially of aluminum base metal, from about 2.0 to about 9.8 weight percent of an alloying element selected from the group consisting of copper, magnesium and mixtures thereof, said magnesium comprising at least 0.05 weight percent, from about 0.01 to about 2.0 weight percent silver, from about 0.2 to about 4.1 weight percent lithium, and from about 0.05 to about 1.0 weight percent of a grain refining additive selected from zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 3
Dependent Claim
25 words
The alloy of claim 1 wherein there is from about 2.0 to about 6.8 percent copper, and from about 0.05 to about 3.0 percent magnesium.
Claim 4
Dependent Claim
16 words
The alloy of claim 2 wherein there is from about 0.2 to about 3.1 percent lithium.
Claim 5
Dependent Claim
16 words
The alloy of claim 3 wherein there is from about 0.05 to about 1.2 percent silver.
Claim 6
Dependent Claim
16 words
The alloy of claim 3 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 7
Dependent Claim
16 words
The alloy of claim 2 wherein there is from about 0.5 to about 2.7 percent lithium.
Claim 8
Dependent Claim
16 words
The alloy of claim 6 wherein there is from about 0.05 to about 1.2 percent silver.
Claim 9
Dependent Claim
16 words
The alloy of claim 6 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 10
Dependent Claim
23 words
The alloy of claim 1 wherein there is from about 2.0 to about 9.8 percent magnesium, and up to about 1.5 percent copper.
Claim 11
Dependent Claim
16 words
The alloy of claim 9 wherein there is from about 0.2 to about 3.1 percent lithium.
Claim 12
Dependent Claim
16 words
The alloy of claim 10 wherein there is from about 0.05 to about 1.2 percent silver.
Claim 13
Dependent Claim
16 words
The alloy of claim 10 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 14
Dependent Claim
16 words
The alloy of claim 9 wherein there is from about 0.5 to about 2.7 percent lithium.
Claim 15
Dependent Claim
16 words
The alloy of claim 13 wherein there is from about 0.05 to about 1.2 percent silver.
Claim 16
Dependent Claim
16 words
The alloy of claim 13 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 17
Dependent Claim
85 words
An alloy consisting essentially of aluminum base metal, from about 2.5 to about 8.5 weight percent of an alloying element selected from the group consisting of copper, magnesium, and mixtures thereof, said magnesium comprising at least 0.05 weight percent, from about 0.05 to about 1.2 weight percent silver, from about 0.2 to about 3.1 weight percent lithium, and from about 0.05 to about 0.6 weight percent of a grain refining additive selected from zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 18
Dependent Claim
85 words
An alloy consisting essentially of aluminum base metal, from about 2.5 to about 8.5 weight percent of an alloying element selected from the group consisting of copper, magnesium, and mixtures thereof, said magnesium comprising at least 0.05 weight percent, from about 0.05 to about 1.2 weight percent silver, from about 0.2 to about 3.1 weight percent lithium, and from about 0.05 to about 0.6 weight percent of a grain refining additive selected from zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 19
Dependent Claim
26 words
The alloy of claim 16 wherein there is from about 3.0 percent to about 6.5 percent copper, and from about 0.05 to about 2.0 percent magnesium.
Claim 20
Dependent Claim
16 words
The alloy of claim 17 wherein there is from about 0.5 to about 2.7 percent lithium.
Claim 21
Dependent Claim
16 words
The alloy of claim 18 wherein there is from about 0.05 to about 0.5 percent additive.
Claim 22
Dependent Claim
16 words
The alloy of claim 18 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 23
Dependent Claim
16 words
The alloy of claim 20 wherein there is from about 0.05 to about 0.5 percent additive.
Claim 24
Dependent Claim
25 words
The alloy of claim 16, wherein there is from about 2.5 to about 7.0 percent magnesium, and from about 0.01 to about 1.0 percent copper.
Claim 25
Dependent Claim
16 words
The alloy of claim 22 wherein there is from about 0.5 to about 2.7 percent lithium.
Claim 26
Dependent Claim
16 words
The alloy of claim 23 wherein there is from about 0.05 to about 0.5 percent additive.
Claim 27
Dependent Claim
16 words
The alloy of claim 23 wherein there is from about 0.1 to about 1.0 percent silver.
Claim 28
Dependent Claim
16 words
The alloy of claim 25 wherein there is from about 0.05 to about 0.5 percent additive.
Claim 29
Dependent Claim
88 words
An aluminum base alloy consisting essentially of from about 3.1 to about 7.5 weight percent of an alloying element selected from the group consisting of copper, magnesium, and mixtures thereof, said magnesium comprising at least 0.1 weight percent, from about 0.1 to about 1.0 weight percent silver, from about 0.5 to about 2.7 weight percent lithium, and from about 0.05 to about 0.5 weight percent of a grain refining additive selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 30
Dependent Claim
88 words
An aluminum base alloy consisting essentially of from about 3.1 to about 7.5 weight percent of an alloying element selected from the group consisting of copper, magnesium, and mixtures thereof, said magnesium comprising at least 0.1 weight percent, from about 0.1 to about 1.0 weight percent silver, from about 0.5 to about 2.7 weight percent lithium, and from about 0.05 to about 0.5 weight percent of a grain refining additive selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof.
Claim 31
Dependent Claim
24 words
The alloy of claim 27 wherein there is from about 4.0 to 6.5 percent copper, and from about 0.10 to about 1.0 percent magnesium.
Claim 32
Dependent Claim
25 words
The alloy of claim 27 wherein there is from about 3.0 to about 5.5 percent magnesium and from about 0.10 to about 1.0 percent copper.
Claim 33
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.2 percent lithium, about 0.15 percent zirconium, and the balance aluminum.
Claim 34
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.2 percent lithium, about 0.15 percent zirconium, and the balance aluminum.
Claim 35
Dependent Claim
46 words
An aluminum alloy consisting essentially of about 5.0 weight percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 36
Dependent Claim
46 words
An aluminum alloy consisting essentially of about 5.0 weight percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 37
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.4 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 38
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.4 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 39
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 0.2 weight percent copper, about 5.0 percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 40
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 0.2 weight percent copper, about 5.0 percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 41
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.7 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 42
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.7 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 43
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 44
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 6.3 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 2.0 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 45
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 5.4 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.4 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 46
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 5.4 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.4 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 47
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 5.4 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.7 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 48
Dependent Claim
50 words
An aluminum alloy consisting essentially of about 5.4 weight percent copper, about 0.4 percent magnesium, about 0.4 percent silver, about 1.7 percent lithium, about 0.15 percent grain refiner selected from the group consisting of zirconium, chromium, manganese, titanium, boron, hafnium, vanadium, titanium diboride, and mixtures thereof, and the balance aluminum.
Claim 49
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 5.0 weight percent copper, about 0.4 percent Mg, about 0.4 percent silver, about 1.3 percent lithium, about 0.14 percent Zr, and the balance aluminum.
Claim 50
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 5.0 weight percent copper, about 0.4 percent Mg, about 0.4 percent silver, about 1.3 percent lithium, about 0.14 percent Zr, and the balance aluminum.
Claim 51
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 4.5 weight percent copper, about 0.4 percent Mg, about 0.4 percent silver, about 1.3 percent lithium, about 0.14 percent Zr, and the balance aluminum.
Claim 52
Dependent Claim
31 words
An aluminum alloy consisting essentially of about 4.5 weight percent copper, about 0.4 percent Mg, about 0.4 percent silver, about 1.3 percent lithium, about 0.14 percent Zr, and the balance aluminum.
Claim 53
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 2.0 to about 6.8 weight percent Cu, from about 0.05 to about 3.0 weight percent Mg, from about 0.01 to about 2.0 weight percent Ag, from about 0.2 to about 4.1 weight percent Li, less than about 1.0 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 54
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 2.0 to about 6.8 weight percent Cu, from about 0.05 to about 3.0 weight percent Mg, from about 0.01 to about 2.0 weight percent Ag, from about 0.2 to about 4.1 weight percent Li, less than about 1.0 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 55
Dependent Claim
19 words
An alloy according to claim 40, wherein the grain refiner comprises from about 0.05 to about 0.2 weight percent.
Claim 56
Dependent Claim
12 words
An alloy according to claim 40, wherein the grain refiner comprises Zr.
Claim 57
Dependent Claim
13 words
An alloy according to claim 42, wherein the grain refiner further comprises Ti.
Claim 58
Dependent Claim
18 words
An alloy according to claim 40, wherein the Mg comprises from about 0.1 to about 1.0 weight percent.
Claim 59
Dependent Claim
18 words
An alloy according to claim 40, wherein the Mg comprises from about 0.3 to about 0.5 weight percent.
Claim 60
Dependent Claim
18 words
An alloy according to claim 40, wherein the Ag comprises from about 0.05 to about 1.2 weight percent.
Claim 61
Dependent Claim
18 words
An alloy according to claim 40, wherein the Ag comprises from about 0.1 to about 1.0 weight percent.
Claim 62
Dependent Claim
18 words
An alloy according to claim 40, wherein the Ag comprises from about 0.3 to about 0.5 weight percent.
Claim 63
Dependent Claim
18 words
An alloy according to claim 40, wherein the Li comprises from about 0.2 to about 3.1 weight percent.
Claim 64
Dependent Claim
18 words
An alloy according to claim 40, wherein the Li comprises from about 0.5 to about 2.7 weight percent.
Claim 65
Dependent Claim
17 words
An alloy according to claim 40, wherein the Li comprises from about 1.0 about 1.4 weight percent.
Claim 66
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 3.0 to about 6.5 weight percent Cu, from about 0.05 to about 2.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, less than about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 67
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 3.0 to about 6.5 weight percent Cu, from about 0.05 to about 2.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, less than about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 68
Dependent Claim
19 words
An alloy according to claim 52, wherein the grain refiner comprises from about 0.05 to about 0.2 weight percent.
Claim 69
Dependent Claim
12 words
An alloy according to claim 53, wherein the grainer refiner comprises Zr.
Claim 70
Dependent Claim
13 words
An alloy according to claim 54, wherein the grain refiner further comprises Ti.
Claim 71
Dependent Claim
18 words
An alloy according to claim 52, wherein the Mg comprises from about 0.1 to about 1.0 weight percent.
Claim 72
Dependent Claim
18 words
An alloy according to claim 52, wherein the Mg comprises from about 0.3 to about 0.5 weight percent.
Claim 73
Dependent Claim
18 words
An alloy according to claim 52, wherein the Ag comprises from about 0.1 to about 1.0 weight percent.
Claim 74
Dependent Claim
18 words
An alloy according to claim 52, wherein the Ag comprises from about 0.3 to about 0.5 weight percent.
Claim 75
Dependent Claim
18 words
An alloy according to claim 52, wherein the Li comprises from about 0.5 to about 2.7 weight percent.
Claim 76
Dependent Claim
18 words
An alloy according to claim 52, wherein the Li comprises from about 1.0 to about 1.4 weight percent.
Claim 77
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 4.0 to about 6.5 weight percent Cu, from about 0.1 to about 1.0 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, less than about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 78
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from about 4.0 to about 6.5 weight percent Cu, from about 0.1 to about 1.0 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, less than about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 79
Dependent Claim
19 words
An alloy according to claim 62, wherein the grain refiner comprises from about 0.05 to about 0.2 weight percent.
Claim 80
Dependent Claim
12 words
An alloy according to claim 63, wherein the grain refiner comprises Zr.
Claim 81
Dependent Claim
13 words
An alloy according to claim 64, wherein the grain refiner further comprises Ti.
Claim 82
Dependent Claim
18 words
An alloy according to claim 62, wherein the Mg comprises from about 0.3 to about 0.5 weight percent.
Claim 83
Dependent Claim
18 words
An alloy according to claim 62, wherein the Ag comprises from about 0.3 to about 0.5 weight percent.
Claim 84
Dependent Claim
18 words
An alloy according to claim 62, wherein the Li comprises from about 1.0 to about 1.4 weight percent.
Claim 85
Dependent Claim
77 words
An aluminum-base alloy consisting essentially of from about 4.8 to about 5.2 weight percent Cu, from about 0.3 to about 0.5 weight percent Mg, from about 0.3 to about 0.5 weight percent Ag, from about 1.0 to about 1.4 weight percent Li, from about 0.08 to about 0.2 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 86
Dependent Claim
77 words
An aluminum-base alloy consisting essentially of from about 4.8 to about 5.2 weight percent Cu, from about 0.3 to about 0.5 weight percent Mg, from about 0.3 to about 0.5 weight percent Ag, from about 1.0 to about 1.4 weight percent Li, from about 0.08 to about 0.2 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 87
Dependent Claim
12 words
An alloy according to claim 69, wherein the grain refiner comprises Zr.
Claim 88
Dependent Claim
13 words
An alloy according to claim 70, wherein the grainer refiner further comprises Ti.
Claim 89
Dependent Claim
76 words
A weldable aluminum-base alloy consisting essentially of from about 4.0 to about 6.5 weight percent Cu, from about 0.1 to about 1.0 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, less than about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 90
Dependent Claim
76 words
A weldable aluminum-base alloy consisting essentially of from about 4.0 to about 6.5 weight percent Cu, from about 0.1 to about 1.0 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, less than about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 91
Dependent Claim
65 words
A weldable alloy according to claim 72, wherein the Cu comprises from about 4.8 to about 5.2 weight percent, the Mg comprises from about 0.3 to about 0.5 weight percent, the Ag comprises from about 0.3 to about 0.5 weight percent, the Li comprises from about 1.0 to about 1.4 weight percent, and the grain refiner comprises from about 0.08 to about 0.2 weight percent.
Claim 92
Dependent Claim
13 words
A weldable alloy according to claim 73, wherein the grain refiner comprises Zr.
Claim 93
Dependent Claim
76 words
A cryogenic aluminum-base alloy consisting essentially of from about 3.0 to about 6.5 weight percent Cu, from about 0.05 to about 2.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, less than about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 94
Dependent Claim
76 words
A cryogenic aluminum-base alloy consisting essentially of from about 3.0 to about 6.5 weight percent Cu, from about 0.05 to about 2.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, less than about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 95
Dependent Claim
65 words
A cryogenic alloy according to claim 75, wherein the Cu comprises from about 4.8 to about 5.2 weight percent, the Mg comprises from about 0.3 to about 0.5 weight percent, the Ag comprises from about 0.3 to about 0.5 weight percent, the Li comprises from about 1.0 to about 1.4 weight percent, and the grain refiner comprises from about 0.08 to about 0.2 weight percent.
Claim 96
Dependent Claim
13 words
A cryogenic alloy according to claim 76, wherein the grain refiner comprises Zr.
Claim 97
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.5 weight percent Cu, from about 2.0 to about 9.8 weight percent Mg, from about 0.01 to about 2.0 weight percent Ag, from about 0.2 to about 4.1 weight percent Li, from about 0.05 to about 1.0 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 98
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.5 weight percent Cu, from about 2.0 to about 9.8 weight percent Mg, from about 0.01 to about 2.0 weight percent Ag, from about 0.2 to about 4.1 weight percent Li, from about 0.05 to about 1.0 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 99
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 2.5 to about 7.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, from about 0.05 to about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 and mixtures thereof, the balance aluminum and incidental impurities.
Claim 100
Dependent Claim
75 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 2.5 to about 7.0 weight percent Mg, from about 0.05 to about 1.2 weight percent Ag, from about 0.2 to about 3.1 weight percent Li, from about 0.05 to about 0.6 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 and mixtures thereof, the balance aluminum and incidental impurities.
Claim 101
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 3.0 to about 5.5 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, from about 0.05 to about 0.05 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 102
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 3.0 to about 5.5 weight percent Mg, from about 0.1 to about 1.0 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, from about 0.05 to about 0.05 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 103
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 3.0 to about 5.5 weight percent Mg, from about 0.3 to about 0.5 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, from about 0.05 to about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 104
Dependent Claim
76 words
An aluminum-base alloy consisting essentially of from 0 to about 1.0 weight percent Cu, from about 3.0 to about 5.5 weight percent Mg, from about 0.3 to about 0.5 weight percent Ag, from about 0.5 to about 2.7 weight percent Li, from about 0.05 to about 0.5 weight percent grain refiner selected from the group consisting of Zr, Cr, Mn, Ti, B, Hf, V, TiB 2 , and mixtures thereof, the balance aluminum and incidental impurities.
Claim 105
Dependent Claim
16 words
An alloy according to claim 79, wherein the Cu comprises at least about 0.01 weight percent.
Claim 106
Dependent Claim
16 words
An alloy according to claim 80, wherein the Cu comprises at least about 0.1 weight percent.
Claim 107
Dependent Claim
16 words
An alloy according to claim 81, wherein the Cu comprises at least about 0.1 weight percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |