aluminum alloy brazing plate for a heat exchanger, and method for making an aluminum brazing plate for a heat exchanger

摘要

This aluminum alloy brazing plate for a heat exchanger is distinguished in that it comprises a four-layer material, in which an air-side brazing filler layer, an intermediate layer, a core material and a filler layer of internal brazing are coated and laminated, in which: the intermediate layer is composed of an aluminum alloy containing 0.2-0.35% by weight of Mn (exclusive of 0.35), maximum 0.6% by weight of Si, at most 0.7% by weight of Fe, at most 0.1% by weight of Cu, and the remainder comprising Al and unavoidable impurities; the core material is composed of an aluminum alloy containing a maximum of 1.2% by weight of Si, a maximum of 1.0% by weight of Fe, 0.3-1.0% of Cu, 0.5-2 , 0 mass% of Mn, and the remainder comprising Al and unavoidable impurities; and the brazing filler layer on the air side and the brazing filler layer are composed of an aluminum alloy containing 4-13% by weight of Si, and the remainder comprising Al and unavoidable impurities. The present invention can provide an aluminum alloy brazing plate to produce a heat exchanger member with excellent corrosion resistance.