摘要 |
An aluminum alloy fin material for heat exchangers, consisting of 0.5 to 1.5 mass% of Si; more than 1.0 mass% but not more than 2.0 mass% of Fe; 0.4 to 1.0 mass% of Mn; and 0.4 to 1.0 mass% of Zn, with the balance being Al and unavoidable impurities, wherein a metallographic microstructure before braze-heating is such that a density of second phase particles having a circle-equivalent diameter of less than 0.1 µm is less than 1×10 7 particles/mm 2 , and that a density of second phase particles having a circle-equivalent diameter of 0.1 µm or more is 1×10 5 particles/mm 2 or more, wherein a tensile strength before braze-heating, TS B (N/mm 2 ), a tensile strength after braze-heating, TS A (N/mm 2 ), and a sheet thickness of the fin material, t (µm), satisfy a relationship: 0.4‰¤(TS B -TS A )/t‰¤2.1, and wherein the sheet thickness is 150 µm or less; and a method of producing the same. |