Patent ID: 7407713

Claim:
A multi-layered rolled aluminum product comprising: (i) at least two distinct aluminum layers, wherein a first distinct aluminum layer has a different composition than a second distinct aluminum layer; (ii) wherein the multi-layered rolled aluminum product is made by a process comprising: (A) direct chill casting a multi-layered slab, the direct chill casting process comprising: (1) flowing a first molten aluminum alloy in a direct chill casting apparatus; (2) providing an aluminum barrier layer; (3) flowing a second molten aluminum alloy into a direct chill casting apparatus, (4) wherein the second molten aluminum alloy has a different composition than the first molten aluminum alloy, (5) wherein the aluminum barrier layer prevents the first molten aluminum alloy from intermixing with the second molten aluminum alloy; (6) forming the first distinct aluminum layer from the first molten aluminum alloy; and (7) forming the second distinct aluminum layer from the second molten aluminum alloy; and (B) rolling the multi-layered slab to form the multi-layered rolled aluminum product.