High strength aluminium alloy extrusion

Details High strength aluminium alloy extrusion High strength aluminium alloy extrusion

C - Chemistry, Metallurgy

22

C

C22C 21/00 (2006.01)

Patent

CA 2722490

An aluminium extrusion having a minimum section thickness and made from an aluminium alloy includes, in weight percent, between approximately 1.0 and 1.7 manganese, and between approximately 0.5 and 1.1 silicon, less than 0.3 iron with the balance being Al and inevitable impurities each less than 0.05 weight % and totaling less than 0.15 weight %, the extrusion being formed with an extrusion ratio less than 125 to retain a fibrous grain structure in which less than 40% of the minimum section thickness is recrystallized.

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