Aluminum alloy for extrusion and drawing processes

摘要

An extrudable aluminum alloy composition includes, in weight percent, between 0.60 and 0.90 manganese, between 0.45 and 0.75 copper, between 0.05 and 0.24 magnesium, less than 0.30 iron, less than 0.30 silicon, less than 0.05 titanium, less than 0.05 vanadium, and a Cu/Mg ratio higher or equal to 3. It also relates to aluminum alloy heat exchanger extruded or drawn tube and extruded or drawn aluminum alloy tubing having the above-described aluminum alloy composition. It also relates to a heat exchanger comprising a plurality of extruded or drawn tube sections having the above-described aluminum alloy composition and a process for manufacturing same.

主权项

1. An extruded or drawn tube for an aluminum alloy heat exchanger comprising an aluminum alloy composition consisting of, in weight percent, between 0.60 and 0.90 manganese, between 0.45 and 0.75 copper, between 0.05and 0.24 magnesium, less than 0.30 iron, less than 0.30 silicon, less than 0.05 titanium, less than 0.05 vanadium, other elements up to 0.05 each and up to 0.15 in total, and a Cu/Mg ratio higher or equal to 3; wherein the tube has a thickness of less than 1.5 mm; wherein the alloy when extruded into a tube has a breakthrough pressure of <18% higher than an AA3003 alloy extruded into an identical profile at the same billet temperature and ram speed.