Aluminum alloy sheet for can lids

Abstract

One aspect of the design proposes a tri-alloy aluminum alloy for can lids, which includes: Si at a quantity of 0.27% by mass or greater and 0.39% by mass or less; Fe at a quantity of 0.35% by mass or greater and 0.55% by mass or less; Cu at a quantity of 0.17% by mass or greater and 0.25% by mass or less; Mn in amounts of 0.75% by mass or greater and 0.95% by mass or less, and Mg in amounts of 2.2% by mass or greater and 2.8% by mass or less, where, in each direction 0°, 45°, and 90° ΞΟ with the rolling direction, the minimum rated value Smin is calculated by the following formula (1) using 0.2% test stress 00.2, tensile strength OB, and the average value Σm of 0.2% test stress and tensile strength is 370 MPa or greater and 410 MPa or less: s = ơfni / (ơO,2 / ơB) ... (1)