| 摘要 |
PROBLEM TO BE SOLVED: To provide a fin material for a mechanical caulking type heat exchanger having the strength not to deform the fin material at the time of high-speed transportation and the elongation rate to obviate the occurrence of crack at the time of caulking and joining to tubes. SOLUTION: The fin material is composed of a cold rolled material having the elongation rate of >=3% of an Al alloy containing over 0.1 wt.% and below 1.0 wt.% Si, over 0.1 wt.% and below 1.0 wt.% Fe, over 0.1 wt.% and below 2.0 wt.% Mn, over 0.05 wt.% and below 0.5 wt.% Cu and over 0.1 wt.% and below 5.0 wt.% Zn and consisting of the balance Al and inevitable impurities. This fin material is composed of the cold rolled material of the Al alloy having the prescribed component and, therefore, has the high strength and the elongation rate of >=3%. Then, the deformation of the fins does not occur in spite of the high-speed transportation in automatic assembly of the heat exchangers and the crack hardly occurs at the time of caulking and joining to the tubes.
|
