# US 11,993,830 B2 · Wires formed from improved 8000-series aluminum alloy

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- Number: US 11,993,830 B2
- Document ID: US11993830B2
- Status: Granted
- Kind: B2
- Application number: 16/198,267
- Filed: 2018-11-21
- Published: 2019-05-23
- Granted: 2024-05-28
- Earliest claimed: 2017-11-22
- Assignees: General Cable Technologies Corporation; NanoAI LLC
- Applicants: General Cable Technologies Corporation; NanoAl, LLC
- Inventors: Srinivas Siripurapu; Shenjia Zhang; Richard Stephen Baker; Nhon Q. Vo; Francisco U. Flores; Davaadorj Bayansan
- Web page: https://patentgrep.com/patent/US11993830B2

## CPC

- C22C 21/00: Alloys based on aluminium
- B21C 37/045: {Manufacture of wire or rods with particular section or properties}
- H01B 1/023: {Alloys based on aluminium}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

Improved 8000-series aluminum alloys exhibiting improved creep resistance and stress relaxation resistance are disclosed and are useful to form wires. The improved 8000-series aluminum alloys include a rare earth element. The electrical conductivity of the aluminum alloy is substantially unaffected by the addition of the rare earth element.

## Claims

### Claim 1

A building wire formed from an improved 8000-series aluminum alloy comprising, by weight:
0.44% to about 0.80% iron;
about 0.10% to about 0.3% copper;
about 0.02% to 0.04% silicon; and
about 0.001% to about 0.1% of a rare earth element selected from one or more of erbium, ytterbium, and scandium;
wherein the improved 8000-series aluminum alloy exhibits an elongation at break of 10% or greater in accordance with ASTM B800-05 (2015);
wherein the improved 8000-series aluminum alloy exhibits one or more of:
i) a tensile creep rate of about 1*10−5 s−1 to about 2*10−8 s−1 when measured in accordance to ASTM E139 (2011) at 100° C. with 70 MPa of applied stress; and
ii) a tensile stress relaxation time of about 1,000 seconds or greater to reach about 85% of an initial tensile stress of 75 MPa when measured in accordance to ASTM E328 (2013) at 25° C.; and
wherein the improved 8000-series aluminum alloy is an improved AA8030 aluminum alloy.

### Claim 2 (depends on 1)

The building wire according to claim 1, wherein the improved 8000-series aluminum alloy comprises about 0.01% to about 0.03%, by weight, of the rare earth element.

### Claim 3 (depends on 1)

The building wire according to claim 1, wherein the rare earth element is selected from one or more of erbium and ytterbium.

### Claim 4 (depends on 1)

The building wire according to claim 1 exhibits an elongation at break of about 20% or greater.

### Claim 5 (depends on 1)

The building wire according to claim 1, wherein the improved 8000-series aluminum alloy exhibits an electrical conductivity at least as great as the electrical conductivity of a standard AA8030 aluminum alloy free of the rare earth element.

### Claim 6 (depends on 1)

The building wire according to claim 1, wherein the improved 8000-series aluminum alloy exhibits an electrical conductivity of about 60.5% international annealed copper standard (“IACS”) or greater.

### Claim 7 (depends on 1)

The building wire according to claim 1, wherein the improved 8000-series aluminum alloy comprises, by weight, about 0.01% to about 0.05% magnesium.

### Claim 8 (depends on 1)

The building wire according to claim 1 exhibits an ultimate tensile strength of about 100 MPa or more when measured in accordance to ASTM B941 (2016).

### Claim 9 (depends on 1)

The building wire according to claim 1 is a 12 American wire gauge (“AWG”) building wire and is configured for use with a wiring terminal or socket.