| abstract |
An extrudable brazeable corrosion resistant aluminium alloy, consisting essentially of, by weight percent, .1-.2 titanium, .6-1.2 manganese, up to .1 silicon, up to .2 iron, and other impurities up to .15, with each such other impurity no greater than .03, and the remainder aluminium. A method of fabricating a heat exchange tube array, by (i) extruding aluminium alloy tubing of the above composition to a uniform wall thickness of about .4mm; (ii) bending and/or arranging the tubes to form a tube array for conducting a fluid medium there through; (iii) interposing an aluminium-based heat exchange means between and in contact with the tubes of the array to provide for heat transfer; (iv) brazing the heat exchange means to the tube array by heating to the temperature range of 595°C whereby the tube array will not be adversely affected metallurgically by the brazing operation. |