Kaiser Aluminum has filed a patent for an aluminum alloy sheet with a composition that includes at least 50% recycled material. The sheet has an ultimate tensile strength ranging from 37 to 52 ksi and a tensile yield strength ranging from 34 ksi to 47 ksi. The patent also covers methods of making the alloy sheet and an aluminum package. GlobalData’s report on Kaiser Aluminum gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Kaiser Aluminum, Ceramic membrane fuel cells was a key innovation area identified from patents. Kaiser Aluminum's grant share as of September 2023 was 81%. Grant share is based on the ratio of number of grants to total number of patents.
Recycled aluminum alloy sheet with specific tensile strength properties
A recently filed patent (Publication Number: US20230257853A1) describes an aluminum alloy sheet that is composed of a combination of recycled and non-recycled materials. The alloy composition includes a first component made from recycled material and a second component made from non-recycled material. The aluminum alloy sheet has a recycled content of at least 50%. The ultimate tensile strength of the sheet ranges from 37 to 52 ksi, while the tensile yield strength ranges from 34 to 47 ksi.
The alloy composition may also include a third component made from mill scrap, such as ingot scrap, casting scrap, remelted scrap ingot (RSI), hot roll processing scrap, cold roll processing scrap, uncoated coil scrap, coated coil, or combinations thereof. The recycled content of the alloy composition can be increased to at least 70%.
The recycled material used in the first component of the alloy sheet can be sourced from various scrap aluminum associations, including AA 5457, AA 5754, AA 5085, AA 5083, AA 5086, AA 5052, AA 5154, AA 5352, AA 5182, AA 5042, as well as post-industrial and post-consumer scrap, Class I to IV scrap, and used beverage cans.
The non-recycled material in the second component of the alloy sheet can be prime aluminum, an alloying element, or combinations thereof. The alloying element can be selected from a range of elements including silicon, iron, copper, magnesium, manganese, titanium, chromium, nickel, zinc, silver, boron, bismuth, gallium, lithium, lead, tin, vanadium, zirconium, or combinations thereof.
The aluminum alloy composition has specific weight percentages for each element, ensuring the desired properties of the alloy sheet. The composition can vary depending on the specific application, with different weight percentages for silicon, iron, copper, magnesium, manganese, titanium, chromium, zinc, gallium, and other elements.
The patent also describes a method of making an aluminum package using the aluminum alloy sheet. The sheet is formed into the desired shape to create an aluminum alloy package. The patent mentions that the aluminum package can be used for processed food applications.
Overall, this patent describes an aluminum alloy sheet with a high recycled content, offering specific tensile strength properties. The alloy composition can be tailored to meet different application requirements, and the method of making aluminum packages using this alloy sheet is also disclosed.