ALUMINUM ALLOY BRAZING SHEET FOR HEAT EXCHANGER EXCELLENT IN STRENGTH AND CORROSION RESISTANCE AND BRAZING METHOD USING THE BRAZING SHEET

摘要

PROBLEM TO BE SOLVED: To produce an aluminum alloy brazing sheet for a heat exchanger excellent in strengths and corrosion resistance and to provide a brazing method using this brazing sheet. ;SOLUTION: One side of an aluminum alloy core material contg., by weight, 0.5 to 1.8% Mn, 0.05 to 1.2% Cu, 0.02 to 0.3% Ti, 0.01 to 1.0% Si, 0.06 to 0.8% Fe, and the balance Al with impurities is clad with a brazing filler metal contg. 5 to 15% Si, 2.5 to 8.0% Zn, and the balance Al with impurities, and the other side is clad with a brazing filler metal contg. 5 to 15% Si, and the balance Al with impurities, and an inert gas atmosphere is applied to brazing. In the case of the application to vacuum brazing, the one obtd. by adding 0.3 to 3% Mg to the brazing filler metal is used. This brazing sheet is suitably usable as the structural member of a drawn cup-type heat exchanger and the tank material of a radiator, a capacitor or the like.;COPYRIGHT: (C)1999,JPO