| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high strength and high formability Al-Mg-Mn based aluminum alloy sheet having excellent cold press formability, particularly, in 180° adhesion bendability, and to provide a method for producing the same. Ž<P>SOLUTION: Disclosed is an aluminum alloy sheet having a composition comprising 5.0 to 6.0% Mg and 0.9 to 1.2% Mn, and in which the ratio between the Mg content and the Mn content, (Mg%/Mn%) is 4.5 to 6.5, and the balance Al with inevitable impurities, and in which rolling reduction of 40 to 89% is applied in cold rolling, and further, final annealing is performed after the cold rolling. Its 0.2% proof stress after the final annealing is ≥170 MPa, and its elongation at break is ≥20%. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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