Aluminum alloy sheet

An aluminum alloy sheet, comprising:

• in mass percent,
• Zn in a content of 2.0% to 9.0%;
• Mg in a content of 0.5% to 4.5%;
• Cu in a content of 0.5% or less;
• Zr in a content of 0.15% or less;
• Mn in a content of 0.2% or less;
• Cr in a content of 0.15% or less;
• Sc in a content of 0.05% or less;
• and
• wherein
• the aluminum alloy sheet includes a surface part ranging from a sheet surface to a depth of 15% of a sheet thickness and a thickness-central part,
• contains grains with Cube orientation and grains with S orientation, an area percentage of the grains with Cube orientation of all grains in the surface part is represented by [surface part Cube], and an area percentage of the grains with S orientation of all grains in the surface part is represented by [surface part S],
• the thickness-central part contains grains with Cube orientation and grains with S orientation, an area percentage of the grains with Cube orientation of all grains in the thickness-central part is represented by [thickness-central part Cube], and an area percentage of the grains with S orientation of all grains in the thickness-central part is represented by [thickness-central part S],
• the surface part comprises an equiaxial recrystallized microstructure having an average grain size of 40 μm or less, and
• the surface part and the thickness-central part have such different textures that:
• the [surface part Cube] is 10% or more;
• the [surface part S] is 10% to 40%;
• a ratio of the [surface part Cube] to the [thickness-central part Cube] is greater than 1.0;
• and
• a ratio of the [surface part S] to the [thickness-central part S] is less than 1.0.