ALUMINUM ALLOY BRAZING SHEET FOR HEAT EXCHANGERS AND ALUMINUM ALLOY BRAZED OBJECT FOR HEAT EXCHANGERS

摘要

Disclosed is an aluminum alloy brazing sheet (1) for heat exchangers, said brazing sheet provided with a core material (2) and a brazing material (3) that comprises an Al-Si-Zn alloy and is formed on at least one side of the core material (2). The core material (2) has a pitting potential of at least -650 mV (vs. Ag/AgCl). The brazing material (3) is characterized by a zinc concentration between 1% and 10% by mass; a liquid fraction X, at the brazing temperature, satisfying the relation 0.3 = X = 0.88; and a clad ratio d (%) satisfying the relation 15 X × d) of the liquid fraction X and the clad ratio d (%) satisfies the relation 6 = (X × d) = 23.