摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy clad material excellent in corrosion resistance and cladding rollability, suitable for use as a fluid passage component member for a heat exchanger made of aluminum alloy for automobile use and particularly suitable for use as a core plate material for a drawn-cup-type heat exchanger. SOLUTION: This clad material is a four-layer clad material prepared by cladding one side of a core material with an intermediate material and further cladding the intermediate material and the other side of the core material with an Al-Si-Mg type brazing filler metal, respectively. The core material is constituted of an aluminum alloy having a composition consisting of 0.5-1.6% Mn, 0.15-0.35% Cu, 0.05-0.50% Mg, 0.06-0.30% Ti, and the balance Al with inevitable impurities. The intermediate material is constituted of an aluminum alloy which has a composition consisting of 0.5-1.2% Mn and the balance Al with inevitable impurities and containing, if necessary, 0.05-1.2% Mg and also has a deformation resistance 70-130% of the deformation resistance of the core material. Further, the thickness of the intermediate material in the four- layer clad material is regulated to 30-150μm.
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