| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy fin material for a heat exchanger, being excellent in collar crack resistance to suppress occurrence of collar crack during fabrication and in corrosion resistance, and a heat exchanger using the fin material.SOLUTION: An aluminum alloy fin material for a heat exchanger is composed of an aluminum alloy where Fe: 0.010 to 0.4 mass% is contained, Cu: is suppressed to less than 0.005 mass%, the rest is composed of Al and inevitable impurity, and Al purity is 99.30 mass% or more. The aluminum alloy fin material for a heat exchanger is characterized in that the aluminum alloy fin material for a heat exchanger has a board thickness of less than 0.115 mm, the mean particle diameter of subgrain is 2.5 μm or less, and an intermetallic compound having a longest length of over 3 μm is at 2000/mmor less. A heat exchanger uses the fin material. |
