Patent ID: 8025748
Filing Date: 2011-09-27
Classification: B21C,C22C,C22F,F28F

Abstract:
1. Aluminum alloy heat exchanger extruded tubes comprising an aluminum alloy composition consisting essentially of, in weight percent, between 0.90 and 1.30 manganese, between 0.05 and 0.25 iron, between 0.05 and 0.25 silicon, between 0.01 and 0.02 titanium, less than 0.01 copper, less than 0.01 nickel, and less than 0.05 magnesium, the aluminum alloy being cast as an ingot and homogenized at a homogenization temperature ranging between 550 and 600° C. before extruding the homogenized ingot into tubes.