| 摘要 |
PROBLEM TO BE SOLVED: To provide an extruded flat perforated pipe for a heat exchanger, which has excellent corrosion resistance and sufficient strength, and can be made thin in thickness, and to provide a heat exchanger. SOLUTION: The extruded flat perforated pipe for the heat exchanger is composed of an aluminum alloy having a composition containing, by mass, 0.01 to 0.30% Si, 0.01 to 0.30% Fe, 0.05 to 0.40% Cu, 0.05 to 0.30% Mn, 0.05 to 0.25% Zr and 0 to 0.15% Ti, and in which the total of Zr and Ti is≤0.3%, and the balance Al with inevitable impurities. As for grains with a grain area of≥1.0μm<SP>2</SP>dispersed into a matrix, the occupancy area ratio of an AlFeSi stable phase is 0.1 to <0.5%. The extruded flat perforated pipe is provided with a Zn flux layer on the outer surface thereof. COPYRIGHT: (C)2009,JPO&INPIT
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