Extrudable corrosion resistant aluminum alloy

Details Extrudable corrosion resistant aluminum alloy Extrudable corrosion resistant aluminum alloy

C - Chemistry, Metallurgy

22

C

C22C 21/00 (2006.01) B21C 23/00 (2006.01)

Patent

CA 2135239

An extrudable brazeable corrosion resistant aluminum 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 aluminum. A method of fabricating a heat exchange tube array, by (i) extruding aluminum 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 therethrough; (iii) interposing an aluminum-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 595C whereby the tube array will not be adversely affected metallurgically by the brazing operation.

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