ALUMINUM ALLOY FOR HEAT EXCHANGER FIN AND MANUFACTURING METHOD THEREFOR AS WELL AS HEAT EXCHANGER USING SAID ALUMINUM ALLOY

摘要

The problem addressed by the invention is to provide an aluminum alloy which can be bonded in a monolayer state as a fin material for a heat exchanger and which does not change shape before and after the bonding. The aluminum alloy for solving the problem is a heat exchanger fin material aluminum alloy that has a heat bonding function as a monolayer. The alloy contains 1.0 5.0 mass% Si 0.1 2.0 mass% Fe and 0.1 2.0 mass% Mn and the remainder is obtained from Al and unavoidable impurities. 250 pieces/mm 7 × 10 pieces of Si intermetallic compounds having an equivalent circle radius of 0.5 5 µm are present in a cross section of the aluminum alloy. 10 pieces/mm 1000 pieces of Al Fe Mn Si intermetallic compounds having an equivalent circle radius exceeding 5 µm are present in a cross section of the aluminum alloy. The alloy can also contain Mg Cu Zn In Sn Ti V Zr Cr Ni Be Sr Bi Na or Ca as needed.