专利申请范围本专利为Mn含量0.5～0.8wt%、Mg含量0.5～2.0wt%,余量为Al和杂质的铝合金.其主要特征是中间退火后的平均晶粒度在45微米以下,铸造时生成的金属间化合物面积率为1～3%,金属间化合物最大长度在25微米以下,并且每0.25毫米~2金属间化合物的数量为1000个以下,是成形性优良的包装用铝合金. 详细说明 Patent Application This patent is an aluminum alloy with Mn content of 0.5 ~ 0.8wt%, Mg content of 0.5 ~ 2.0wt%, balance of Al and impurities, whose main characteristic is the average grain size after intermediate annealing is below 45μm, Is 1% to 3%, the maximum length of the intermetallic compound is 25 microns or less, and the number of the intermetallic compounds per 0.25 mm2 is 1,000 or less, which is an aluminum alloy for packaging having excellent formability. Detailed description