ALUMINUM ALLOY FIN MATERIAL FOR HEAT EXCHANGER AND HEAT EXCHANGER INCLUDING THE FIN MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy fin material for a heat exchanger which has a thickness of≤80μm (0.08 mm) and excels in joinability to a tube material and in intergranular corrosion resistance. SOLUTION: The aluminum alloy fin material is an aluminum alloy bare fin material or a brazing fin material which has a thickness of≤80μm and is incorporated into a heat exchanger made of an aluminum alloy manufactured by brazing through an Al-Si alloy filler metal. The structure of the core material before brazing is a fiber structure, and the crystal grain diameter of the structure after brazing is 50 to 250μm. The Si concentration in the Si dissolution area on the surface of the fin material and at the center of the thickness of the fin material after brazing is preferably≥0.8% and≤0.7%, respectively. COPYRIGHT: (C)2004,JPO