Patent ID: 6592688
Filing Date: 2003-07-15
Classification: B22D,C22C,C22F,F28F

Abstract:
A method of producing an aluminum alloy fin stock from an alloy comprising 1.2-1.8% Fe, 0.7-0.95% Si, 0.3-0.5% Mn, 0.3-1.2% Zn, and the balance Al, which comprises continuously strip casting the alloy at a cooling rate greater than 10Â° C./sec. but less than 200Â° 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, to thereby obtain a fin stock having a conductivity after brazing greater than 49.8% IACS and an ultimate tensile strength after brazing greater than about 127 MPa.