ALUMINIUM ALLOY FOR USE IN THE BUILDING INDUSTRY
A method of making from a rolled aluminium alloy sheet a product for outdoor use in the building industry, wherein the aluminium alloy has the following composition, in wt. %: Si 0.6 to 1.6, Mg 0.10 to 0.50, Mn 0.6 to 1.6, Cu 0.10 to 0.6, Fe 0.05 to 0.7, Ti 0.05 to 0.20, Zn up to 0.4, others and unavoidable impurities, each 0.05% max, total 0.25%, balance aluminium. Furthermore, the use of the sheet product for outdoor use in the building industry is disclosed.
1 . A method of making from a rolled aluminium alloy sheet a product for outdoor use in the building industry, signposting, or decoration, comprising:
folding or roll forming the aluminium alloy sheet into the product, wherein the aluminium alloy has the following composition, in wt. %:
Si 0.6-1.6
Mg 0.20-0.50
Mn 0.6-1.6
Cu 0.10-0.6
Fe 0.05-0.7
Ti 0.05-0.20
Zn up to 0.4,
others and unavoidable impurities, each 0.05% max, total 0.25%, balance aluminium.
2 . The method according to claim 1 , wherein the rolled aluminium alloy has a Mn content is at least 0.70%.
3 . The method according to claim 1 , wherein the rolled aluminium alloy has a Mn content of at most 1.4%.
4 . The method according to claim 1 , wherein the rolled aluminium alloy has a Cu-content of at least 0.15%.
5 . The method according to claim 1 , wherein the rolled aluminium alloy has a Zn-content of at most 0.10%.
6 . The method according to claim 1 , wherein the rolled aluminium alloy has a Ti-content of at least 0.07%.
7 . The method according to claim 1 , wherein the rolled aluminium alloy has a Ti content of at most 0.17%.
8 . The method according to claim 1 , wherein the rolled aluminium alloy has a Mg-content of at least 0.25%.
9 . The method according to claim 1 , wherein the rolled aluminium alloy has a Si-content of at least 0.90%.
10 . A method according to claim 1 , wherein the rolled aluminium alloy sheet is devoid of any metallic layers covering substantial parts of said rolled aluminium alloy sheet.
11 . The method according to claim 1 , wherein the rolled aluminium alloy sheet is provided with an organic coating.
12 . The method according to claim 1 , wherein the rolled aluminium alloy sheet is provided with a surface structure via sheet metal embossing.
13 . The method according to claim 1 , wherein the rolled aluminium alloy sheet is in the form of trapezoidal sheet.
14 . The method according to claim 1 , wherein the product is for outdoor use in the building industry.
15 . The method according to claim 1 , wherein the rolled aluminium alloy sheet is part of a façade structure or roof structure.
16 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a gauge in the range of 0.2 to 3 mm.
17 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Ti-content of at least 0.08%.
18 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Ti-content of at most 0.15%.
19 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Mn-content of at least 0.75%.
20 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Mn-content of at most 1.2%.
21 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Cu-content of at most 0.5%.
22 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Cu-content of at most 0.4%.
23 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Si-content of at most 1.50%.
24 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Si-content of at most 1.45%.
25 . The method according to claim 1 , wherein the rolled aluminium alloy sheet has a Fe-content of at most 0.45%.