High conductivity aluminum fin alloy
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United States of America Patent
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Jul 15, 2003
Issued Date -
N/A
app pub date -
Jul 23, 1998
filing date -
Jul 23, 1998
priority date (Note) -
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Abstract
An improved aluminum alloy fin stock is described having both a high strength and a high thermal conductivity. The fin stock contains 1.2-1.8% Fe, 0.7-0.95% Si, 0.3-0.5% Mn, 0.3-1.2% Zn and the balance Al, and is produced by continuously strip casting the alloy at a cooling rate greater than 10.degree. C./sec. but less than 200.degree. C./sec., hot rolling the strip to a re-roll sheet without homogenization, cold rolling the re-roll sheet to an intermediate gauge, annealing the sheet and cold rolling the sheet to final gauge. This fin stock has a conductivity after brazing of greater than 49.8% IACS.
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