ALUMINUM ALLOY, EXTRUDED TUBE FORMED FROM ALUMINUM ALLOY, AND HEAT EXCHANGER
An aluminum alloy for heat exchanger applications and a method for fabricating a billet comprising the aluminum alloy are disclosed. The aluminum alloy includes an amount of silicon between 0.01 and 0.08wt%; an amount of iron between 0.03 and 0.12wt%; an amount of manganese 0.50 and 0.90wt%; an amount of titanium 0.1 and 0.15wt%; an amount of zinc between 0.05 and 0.10wt%; no more than 0.03wt% copper; no more than 0.008wt% nickel; no more than 0.03wt% other impurities; and a balance of aluminum. The ratio of iron and silicon to manganese ranges from 0.044 to 0.40, and the total wt% of zinc and titanium is between 0.15 and 0.25wt%. Fabrication of the billet includes heating and soaking the billet to a temperature between 575 °C and 625 °C and cooling the billet to 350 °C at a controlled rate between 100 °C and 225 °C per hour.