Aluminum alloy sheet excellent in high-temperature sagging resistance and sacrificial anode property and having high room-temperature strength

摘要

An aluminum alloy sheet as a fin material for tubes of a heat exchanger, excellent in high-temperature sagging resistance and sacrificial anode property and having a high room-temperature strength, which consists essentially of: Manganese: from 0.95 to 1.50 wt. %, silicon: from 0.5 to 1.2 wt. %, zinc: from 0.1 to 2.0 wt. %, at least one element selected from the group consisting of: copper: from 0.05 to 0.60 wt. %, and magnesium: from 0.05 to 0.60 wt. %, where, the total amount of said copper and said magnesium being up to 1.0 wt. %, and the balance being aluminum and incidental impurities. the above-mentioned aluminum alloy sheet may further additionally contain at least one element selected from the group consisting of: chromium: from 0.03 to 0.30 wt. %, and zirconium: from 0.03 to 0.15 wt. % where, the total amount of said chromium and said zirconium being up to 0.4 wt. %.