ALUMINUM ALLOY CLAD MATERIAL FOR HEAT EXCHANGER EXCELLENT IN BRAZING PROPERTY AND CORROSION RESISTANCE

摘要

PROBLEM TO BE SOLVED: To obtain an aluminum alloy clad material for heat exchangers excellent in brazing property and corrosion resistance and capable of being suitably used for a radiator, heater core, or the like, as a tube material of a heat exchanger for automobile. SOLUTION: This material is obtained by cladding a sacrificial anode material having the composition containing one or more metals of 0.5-4.0% Zn, 0.005-0.1% In and 0.01-0.1% Sn and regulated to =0.3% Si, =0.5% Fe and =0.04% Mg and the balance Al with impurities on one surface of aluminum alloy core material containing 0.6-2.0% Mn, 0.3-1.0% Cu and 0.06-1.0% Si and regulated to =0.4% Fe and =0.04% Mg and the balance Al with impurities, and cladding a brazing filler metal containing 6-14% Si and 0.06-0.7% Fe and regulated to =0.04% Mg and =0.006% Ca and the balance Al with impurities on another surface.