| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al-Mg-Si based Al alloy sheet which has excellent bending workability particularly in hem working or the like even if room temperature aging is performed, and further has excellent press formability, low temperature age hardenability or the like. SOLUTION: In the Al-Mg-Si based aluminum alloy sheet, as characteristics after room temperature aging, 0.2% proof stress in a direction parallel to the rolling direction of the sheet lies within the range of 120 to 170 MPa, and (r) value in a direction perpendicular to the rolling direction of the sheet, i.e., r<SB>90</SB>is≥1.0. Further, (r<SB>0</SB>+r<SB>90</SB>-2×r<SB>45</SB>)/4 denoting the difference between the mean value of the r<SB>90</SB>and (r) value<SB></SB>in a direction parallel to the rolling direction of the sheet, i.e., r<SB>0</SB>, and (r) value in a direction of 45 degrees to the rolling direction of the sheet, i.e., r<SB>45</SB>lies within the range of 0.1 to 0.6. COPYRIGHT: (C)2004,JPO
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