ALUMINUM ALLOYS PRODUCED FROM RECYCLED ALUMINUM ALLOY SCRAP
Provided herein are aluminum alloys and methods of making these alloys. The aluminum alloys described herein are produced with a high content of recycled scrap. The recycled scrap may include used beverage can scrap and mixed alloy scrap (e.g., automotive scrap containing one or more of 5xxx, 6xxx, and/or 7xxx series aluminum alloys). Surprisingly, aluminum alloy products produced from the aluminum alloys including a high content of recycled scrap as described herein exhibit mechanical properties comparable to those displayed by high-performance aluminum alloy products, such as high tensile strength, good formability without cracking and/or fracture, and/or high elongation before fracture.
1 . An aluminum alloy, comprising 0.50 wt. %-3.00 wt. % Mg, 0.10 wt. %-3.50 wt. % Si, 0.01 wt. %-0.60 wt. % Fe, up to 1.20 wt. % Cu, 0.10 wt. %-0.90 wt. % Mn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.10 wt. % V, up to 1.00 wt. % Zn, up to 0.15 wt. % impurities, and Al.
2 . The aluminum alloy of claim 1 , comprising 1.00 wt. %-2.50 wt. % Mg, 0.20 wt. %-3.00 wt. % Si, 0.15 wt. %-0.50 wt. % Fe, 0.001 wt. %-0.90 wt. % wt. % Cu, 0.20 wt. %-0.80 wt. % Mn, up to 0.15 wt. % Cr, up to 0.10 wt. % Ti, up to 0.08 wt. % V, 0.001 wt. %-0.50 wt. % Zn, up to 0.15 wt. % impurities, and Al.
3 . The aluminum alloy of claim 1 , comprising 1.40 wt. %-2.40 wt. % Mg, 0.30 wt. %-2.50 wt. % Si, 0.20 wt. %-0.40 wt. % Fe, 0.05 wt. %-0.75 wt. % Cu, 0.40 wt. %-0.70 wt. % Mn, up to 0.10 wt. % Cr, up to 0.05 wt. % Ti, up to 0.05 wt. % V, 0.005 wt. %-0.40 wt. % Zn, up to 0.15 wt. % impurities, and Al.
4 . The aluminum alloy of claim 1 , comprising 1.00 wt. %-3.00 wt. % Mg, 0.10 wt. %-0.90 wt. % Si, 0.01 wt. %-0.60 wt. % Fe, up to 0.50 wt. % Cu, 0.10 wt. %-0.90 wt. % Mn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.10 wt. % V, up to 1.00 wt. % Zn, up to 0.15 wt. % impurities, and Al;
wherein the aluminum alloy comprises up to 100% recycled scrap; and
wherein the recycled scrap comprises at least 25% of used beverage can scrap, based on the total weight of the recycled scrap.
5 . The aluminum alloy of claim 1 , comprising 1.25 wt. %-2.50 wt. % Mg, 0.20 wt. %-0.80 wt. % Si, 0.15 wt. %-0.50 wt. % Fe, 0.01 wt. %-0.30 wt. % Cu, 0.20 wt. %-0.80 wt. % Mn, up to 0.15 wt. % Cr, up to 0.10 wt. % Ti, up to 0.05 wt. % V, up to 0.50 wt. % Zn, up to 0.15 wt. % impurities, and Al.
6 . The aluminum alloy of claim 1 , comprising 1.60 wt. %-2.40 wt. % Mg, 0.30 wt. %-0.60 wt. % Si, 0.20 wt. %-0.40 wt. % Fe, 0.05 wt. %-0.20 wt. % Cu, 0.40 wt. %-0.70 wt. % Mn, up to 0.10 wt. % Cr, up to 0.05 wt. % Ti, up to 0.03 wt. % V, up to 0.20 wt. % Zn, up to 0.15 wt. % impurities, and Al.
7 . The aluminum alloy of claim 1 , wherein a ratio of the wt. % of Si:Mg is from 0.05:1 to 0.60:1.
8 . The aluminum alloy of claim 1 , wherein the aluminum alloy has an excess Si content from −1.70 to 0.10.
9 . The aluminum alloy of claim 1 , wherein the aluminum alloy comprises a Cu content of less than 0.20 wt. %, a Si:Mg ratio from 0.20:1 to 0.45:1, and an excess Si content from −1.30 to 0.
10 . The aluminum alloy of claim 1 , wherein the aluminum alloy comprises up to 100% recycled scrap, and wherein the recycled scrap comprises at least 50% of used beverage can scrap, based on the total weight of the recycled scrap.
11 . The aluminum alloy of claim 10 , wherein the recycled scrap comprises at least 25% of mixed alloy scrap.
12 . The aluminum alloy of claim 11 , wherein the mixed alloy scrap comprises one or more of a 5xxx series aluminum alloy, a 6xxx series aluminum alloy, and a 7xxx series aluminum alloy.
13 . The aluminum alloy of claim 12 , wherein the mixed alloy scrap comprises a ratio of the 5xxx series aluminum alloy to the 6xxx series aluminum alloy from 1:3 to 3:1.
14 . (canceled)
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16 . The aluminum alloy of claim 1 , wherein the aluminum alloy, when in a T4 temper, has a yield strength (Rp0.2) of from 160 MPa to 250 MPa when tested according to ISO 6892-1 (2016) after paint baking at a temperature of 185° C. for 20 minutes and 2% pre-straining.
17 . The aluminum alloy of claim 1 , wherein the aluminum alloy has a total elongation of at least 15%, wherein the aluminum alloy has a r(10) value of at least 0.40 in all directions (longitudinal (L), diagonal (D), and/or transverse (T) to a rolling direction), wherein the aluminum alloy has a 3 bend angle of from 40° to 100° for bendability testing according to Specification VDA 238-100.
18 . (canceled)
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20 . The aluminum alloy of claim 1 , wherein the aluminum alloy excludes any primary aluminum alloy.
21 . The aluminum alloy of claim 1 , wherein the aluminum alloy 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.
22 . The aluminum alloy of claim 1 , wherein the aluminum alloy is produced from a process comprising homogenization, hot rolling, cold rolling, solution heat treatment, pre-aging, and artificial aging.
23 . (canceled)
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25 . The aluminum alloy of claim 1 , wherein the aluminum alloy comprises recycled scrap from one or more of end-of life aluminum articles, mixed automotive scrap, UBC scrap, twitch, and heat exchanger scrap.
26 . (canceled)
27 . The aluminum alloy of claim 25 , wherein the recycled scrap comprises 100% of scrap derived from the end-of life aluminum articles.
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30 . (canceled)