Granted Patent B2

US 12,247,271 · App. 18/433,819 · Granted Mar 11, 2025

Inventors: Aurèle Mariaux (Sierre, CH); Aude Celine Despois (Grone, CH); Milan Felberbaum (Lausanne, CH); Guillaume Florey (Veyras, CH)

Assignee: NOVELIS INC.

C22C21/08B32B15/016C22F1/047Y10T428/12764

Abstract

Claims (30)

1. An aluminum alloy, comprising:

from 1.30 wt. % to 1.50 wt. % Mg;

from 0.25 wt. % to 0.45 wt. % Si;

from 0.01 wt. % to 1.0 wt. % Fe;

from 0.01 wt. % to 0.5 wt. % Cu;

from 0.01 wt. % to 0.5 wt. % Mn;

from 0.005 wt. % to 0.3 wt. % Cr;

from 0.01 wt. % to 0.3 wt. % Ti;

up to 0.4 wt. % Zn;

up to 0.20 wt. % impurities; and remainder Al;

wherein the Mg and Si are present in a ratio of from 5:1 to 2:1 of Mg to Si by weight.

2. The aluminum alloy of claim 1 , wherein the Mg and Si are present in a ratio of from 4:1 to 2:1 of Mg to Si by weight.

3. The aluminum alloy of claim 1 , wherein the aluminum alloy, when in a T8x temper, has a yield strength (Rp0.2) of from 160 MPa to 230 MPa when tested according to ISO 6892-1 (2016).

4. The aluminum alloy of claim 1 , wherein the aluminum alloy has a bake hardening value from 70 MPa to 140 MPa.

5. The aluminum alloy of claim 1 , comprising at least 40 wt. % recycled content.

6. The aluminum alloy of claim 1 , comprising at least 40 wt. % UBC.

7. The aluminum alloy of claim 1 , wherein the combined concentration of Fe, Mn and Cu in the aluminum alloy is at least 0.7 wt. %.

8. The aluminum alloy of claim 1 , wherein the combined concentration of Fe, Mn, and Cu in the aluminum alloy is between 0.7 wt. % and 3.0 wt. %.

9. The aluminum alloy of claim 1 , wherein the aluminum alloy is a core layer in a clad product.

10. A monolithic sheet, comprising the aluminum alloy of claim 1 .

11. A clad aluminum alloy product, comprising:

a core layer having a first side and a second side; and

a first clad layer in contact with the first side of the core layer;

wherein the core layer comprises the alloy of claim 1 .

12. The clad aluminum alloy product of claim 11 , wherein the first clad layer has a thickness of from 0.05 mm to 0.80 mm.

13. The clad aluminum alloy product of claim 11 , wherein the core layer has a thickness of from 0.7 to 2.3 mm.

14. The clad aluminum alloy product of claim 11 , further comprising a second clad layer in contact with the second side of the core layer.

15. The clad aluminum alloy product of claim 11 , wherein the first clad layer comprises an 1xxx series aluminum alloy, 2xxx series aluminum alloy, a 3xxx series aluminum alloy, a 4xxx series alloy, a 5xxx series aluminum alloy, a 6xxx series aluminum alloy, a 7xxx series aluminum alloy, or an 8xxx series aluminum alloy.

16. The clad aluminum alloy product of claim 11 , wherein the clad aluminum alloy product when in a T8x temper has a yield strength of at least 150 MPa and when in a T4 temper has a total elongation above 20% in all directions.

17. The clad aluminum alloy product of claim 11 , wherein the clad aluminum alloy product is a sheet, a plate, an electronic device housing, an automotive structural part, an aerospace structural part, an aerospace non-structural part, a marine structural part, or a marine non-structural part.

Assignments (3)

Continuity (4)

References Cited (186)