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Abstract

A brazeable aluminum alloy sheet consisting essentially of 0.8 to 1.3 wt % of Mn, 0.2 to 0.7 wt % of Si, one or two of 0.04 to 0.1 wt % of In and 0.1 to 2.0 wt % of Zn, the balance being aluminum and unavoidable impurities. The brazeable aluminum alloy sheet is produced by a process which comprises preparing an ingot of aluminum alloy containing 0.8 to 1.3 wt % of Mn and 0.2 to 0.7 wt % of Si, the balance being aluminum and unavoidable impurities, hot rolling the aluminum mass at a temperature of 350.degree. to 450.degree. C. without conducting a homogenizing treatment, conducting a first part of cold rolling on the hot rolled aluminum alloy, conducting a process annealing on the aluminum alloy at a temperature of 350.degree. to 420.degree. C., and conducting a second part of cold rolling on the annealed aluminum alloy at a draft percentage of 20 to 40%.

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First Claim