Aluminum-alloy rolled sheet and production method thereof

An aluminum-alloy rolled sheet:

• having a chemical composition containing Si:
• 0.80 mass % or more and 2.5 mass % or less, Mn:
• 0.40 mass % or more and 1.2 mass % or less, Mg:
• 0.25 mass % or more and 0.65 mass % or less, and Fe:
• 0.050 mass % or more and 0.45 mass % or less, the remainder being composed of Al and unavoidable impurities;
• the uniform elongation value in a direction perpendicular to rolling being 19.5% or greater;
• having properties such that, after introducing a pre-strain of 2%, and thereafter performing aging treatment under conditions of a hold temperature of 170° C. and a hold time of 20 minutes, the 0.2% yield strength in the direction perpendicular to rolling is 175 MPa or greater;
• and
• the value Δr of the anisotropy of the Lankford values expressed by the following Equation (1) being −0.50 or greater and 0 or less.
• Δ
• ⁢
• r
• =
• (
• r
• 0
• -
• 2
• ×
• r
• 45
• +
• r
• 90
• )
• /
• 2
• (
• 1
• )
• (It is provided that, in Equation (1) above, r0 represents the Lankford value in the rolling direction, r45 represents the Lankford value in the 45° direction relative to the rolling direction, and r90 represents the Lankford value in the direction perpendicular to rolling.)