Aluminum alloy brazing sheet having excellent brazing properties and corrosion resistance , and heat exchanger using the same

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy brazing sheet excellent in brazing property and corrosion resistance while using a brazing filler metal in which Zn is not added.;SOLUTION: In an aluminum alloy brazing sheet, a brazing filler metal is cladded on one main surface of a core material. The core material contains 0.02-0.3% (mass%, the same applies hereinafter) Si, 0.02-0.3% Fe, 0.3-1.0% Cu, 0.6-1.8% Mn, 0.05-0.25% Ti, and Al and inevitable impurities as the reminder. The brazing filler metal contains 3.0-9.4% Si, 0.1-1.5% Fe, and the rest Al and inevitable impurities. The relationships of 50a≤-34×b+42.5 and 0.03×t≤a≤0.30×t are satisfied, where the total thickness of the aluminum alloy brazing sheet is t (μm), the thickness of the brazing filler metal is a (μm), and the amount of Si in the brazing filler metal is b (%).;COPYRIGHT: (C)2012,JPO&INPIT