| 摘要 |
PROBLEM TO BE SOLVED: To obtain an aluminum alloy for a fin by twin belt casting, which is suitable for a twin belt casting process, can be easily twin-belt-cast though having a wide solid-liquid coexistence range, and provides a fin material having high conductivity, high strength and further high erosion resistance after being brazed, and superior solderability; and to obtain the fin material. SOLUTION: The aluminum alloy comprises, by wt%, 0.7 to 1.3% Si, exceeding 2.0% but 2.8% or less Fe, exceeding 0.6% but 1.2% or less Mn, exceeding 0.02% but 1.5% or less Zn and the balance Al with unavoidable impurities. The fin material made of the aluminum alloy has the same composition as the above, 110,000 pieces/mm<SP>2</SP>or more of intermetallic compounds with the maximum diameter of 0.1 to 1.0μm, and the crystal grain sizes of 150μm or larger after being brazed. COPYRIGHT: (C)2005,JPO&NCIPI
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