# US 2019/0376165 A1 · Aluminum alloys and methods of manufacture

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- Number: US 2019/0376165 A1
- Document ID: US20190376165A1
- Status: Published application
- Kind: A1
- Application number: 16/434,984
- Filed: 2019-06-07
- Published: 2019-12-12
- Earliest claimed: 2018-06-12
- Assignees: Novelis Inc.
- Applicants: Novelis Inc.
- Inventors: Wei Wen; Yi Wang; Richard Hamerton; Adriano Manuel Povoa Ferreira; Babak Raeisinia; Zhuoru Wu; Sebastijan Jurendic; Vishwanath Hegadekatte; Carlos Nobrega
- Web page: https://patentgrep.com/patent/US20190376165A1

## CPC

- C22C 21/08: with silicon
- B21B 1/22: for rolling {plates, strips,} bands or sheets of indefinite length (B21B1/42 takes precedence)
- B21B 3/00: Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences {; Rolling of aluminium, copper, zinc or other non-ferrous metals}(altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C21D, C22F)
- C22C 21/00: Alloys based on aluminium
- C22C 21/06: with magnesium as the next major constituent
- C22F 1/04: of aluminium or alloys based thereon
- C22F 1/047: of alloys with magnesium as the next major constituent
- B21B 2001/221: {by cold-rolling}
- B21B 2001/225: {by hot-rolling}
- B21B 2003/001: {Aluminium or its alloys}
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)
- C22F: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass, C23F17/00)

## Abstract

Provided herein are novel aluminum alloy compositions and methods of making and processing the same. The alloys described herein can be used in bottle making applications and exhibit enhanced runnability, formability, and appearance. The methods of producing an aluminum alloy sheet described herein can include casting an aluminum alloy to form an ingot, homogenizing the ingot, hot rolling the ingot to produce a hot band, and cold rolling the hot band to an aluminum alloy sheet of final gauge.

## Claims

### Claim 1

An aluminum alloy comprising 0.2-0.8 wt. % Fe, 0.05-0.50 wt. % Si, 0.40-1.65 wt. % Mg, 0.40-1.50 wt. % Mn, 0.03-0.35 wt. % Cu, up to 0.07 wt. % Cr, up to 0.05 wt. % Ni, up to 0.07 wt. % Ti, up to 0.35 wt. % of Zn, up to 0.04 wt. % Zr, up to 0.15 wt. % impurities, with the remainder as Al, and wherein the alloy comprises an Effective Mg Index up to about 0.9.

### Claim 2 (depends on 1)

The aluminum alloy of claim 1, comprising 0.3-0.6 wt. % Fe, 0.12-0.36 wt. % Si, 0.65-1.22 wt. % Mg, 0.65-1.1 wt. % Mn, 0.05-0.25 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 3 (depends on 1)

The aluminum alloy of claim 1, comprising 0.36-0.44 wt. % Fe, 0.21-0.27 wt. % Si, 0.75-0.85 wt. % Mg, 0.75-0.85 wt. % Mn, 0.11-0.15 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 4 (depends on 1)

The aluminum alloy of claim 1, comprising 0.36-0.44 wt. % Fe, 0.21-0.27 wt. % Si, 0.75-0.85 wt. % Mg, 0.75-0.85 wt. % Mn, 0.06-0.1 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 5 (depends on 1)

The aluminum alloy of claim 1, comprising 0.36-0.44 wt. % Fe, 0.15-0.21 wt. % Si, 0.75-0.85 wt. % Mg, 0.75-0.85 wt. % Mn, 0.11-0.15 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 6 (depends on 1)

The aluminum alloy of claim 1, comprising 0.36-0.44 wt. % Fe, 0.21-0.27 wt. % Si, 0.75-0.85 wt. % Mg, 0.75-0.85 wt. % Mn, 0.18-0.22 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 7 (depends on 1)

The aluminum alloy of claim 1, comprising 0.46-0.54 wt. % Fe, 0.27-0.33 wt. % Si, 0.93-1.07 wt. % Mg, 0.8-0.94 wt. % Mn, 0.11-0.15 wt. % Cu, up to 0.05 wt. % Cr, up to 0.03 wt. % Ni, up to 0.05 wt. % Ti, up to 0.25 wt. % of Zn, up to 0.03 wt. % Zr, and up 0.15 wt. % impurities, with the remainder as Al.

### Claim 8 (depends on 1)

The aluminum alloy of claim 1, further comprising a Fe to Si ratio of 0.5 to 6.7, 0.8 to 5, 1.3 to 2.1, 1.7 to 2.9, or 1.4 to 2.0.

### Claim 9 (depends on 1)

A bottle or can comprising the aluminum alloy of claim 1.

### Claim 10 (depends on 1)

An aluminum sheet comprising the aluminum alloy of claim 1.

### Claim 11 (depends on 1)

A method of producing an aluminum alloy product from the aluminum alloy of claim 1, comprising:
casting an aluminum alloy to form an ingot or a slab;
homogenizing the ingot or the slab;
hot rolling the ingot or the slab to produce an aluminum alloy body; and
cold rolling the aluminum alloy body to an aluminum alloy product with a final gauge.

### Claim 12 (depends on 11)

The method of claim 11, wherein the homogenizing step includes subjecting the ingot or slab to a temperature of from 550° C. to 625° C. for between 2 hours to 30 hours.

### Claim 13 (depends on 11)

The method of claim 11, wherein the hot rolling step includes an entry temperature of from 380° C. to 500° C.

### Claim 14 (depends on 11)

The method of claim 11, wherein the hot rolling step includes an exit temperature of from 280° C. to 400° C.

### Claim 15 (depends on 11)

The method of claim 11, wherein a hot rolling exit temperature is greater than a recrystallization temperature of the aluminum alloy.

### Claim 16 (depends on 11)

The method of claim 11, wherein the hot rolling step includes a first hot rolling operation that reduces a thickness of the ingot or slab in a range between 94% to 96% to provide an intermediate thickness and a second hot rolling operation that reduces a thickness of the ingot or slab having the intermediate thickness in a range between 80% to 93%.

### Claim 17 (depends on 11)

The method of claim 11, wherein the cold rolling step includes reducing the aluminum alloy body by about 70% to 98% thickness reduction.

### Claim 18 (depends on 11)

The method of claim 11, wherein the cold rolling step comprises a first cold rolling operation, a second cold rolling operation, a third cold rolling operation, and a fourth cold rolling operation.

### Claim 19 (depends on 18)

The method of claim 18, wherein the cold rolling step comprises reducing a thickness of the aluminum alloy body between about 89% to 91%.

### Claim 20 (depends on 18)

The method of claim 18, wherein each of the first cold rolling operation, the second cold rolling operation, the third cold rolling operation, and the fourth cold rolling operation provides a reduction in thickness in a range of about 40% to 60%.