| 摘要 |
PROBLEM TO BE SOLVED: To provide a brazing sheet which comprises a core material and a filler alloy, and which has an improved corrosion resistance.SOLUTION: The aluminum alloy clad material has a core material of an aluminum alloy comprising Mn:0.5 mass% to 2.0 mass% (hereinbelow, mass% is abbreviated simply to %), Cu:0.1% to 0.8%, Si:0.15% to 0.6%, Fe:0.05% to 1.0%, with the balance being Al and inevitable impurities, and a filler alloy of an aluminum alloy comprising Si:3% to 12%, Fe:0.05% to 0.5%, with the balance being Al and inevitable impurities, in which the core material is clad with the filler alloy on one face or both of the faces thereof. In a core material layer of the aluminum alloy clad material, an Al-Si-based or Al-Mn-Si-based intermetallic compound with a diameter of 2.0 μm or more and less than 10.0 μm is distributed in a number of 500 to 3,000, per mm. In a filler alloy layer of the aluminum alloy clad material, a precipitate of a Si particle with a diameter of 0.01 μm or more and less than 1.0 μm is distributed in a number of 5,000 to 20,000, per mm. |
