Aluminum alloy brazing sheet for heat exchanger and method for producing aluminum alloy brazing sheet for heat exchanger

摘要

An aluminum alloy brazing sheet includes a four-layer material in which an air-side brazing material layer, an intermediate layer, a core material, and an internal brazing material layer are cladded and stacked, the intermediate layer is formed of an aluminum alloy including Mn of 0.2 mass % or more and less than 0.35 mass %, Si of 0.6 mass % or less, Fe of 0.7 mass % or less, and Cu of 0.1 mass % or less, with the balance being Al and inevitable impurities, the core material is formed of an aluminum alloy including Si of 1.2 mass % or less, Fe of 1.0 mass % or less, Cu of 0.3 mass % or more and 1.0 mass % or less, and Mn of 0.5 mass % or more and 2.0 mass % or less, with the balance being Al and inevitable impurities, and each of the air-side brazing material layer and the internal brazing material layer is formed of an aluminum alloy including Si of 4 mass % or more and 13 mass % or less, with the balance being Al and inevitable impurities. The present invention provides an aluminum alloy brazing sheet for manufacturing a member for a heat exchanger with excellent corrosion resistance.