| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet having excellent neck workability and screwing workability in an aluminum can with a screw. <P>SOLUTION: The aluminum alloy sheet has a composition comprising, by weight, 0.25 to 0.40% Si, 0.35 to 0.50% Fe, 0.15 to 0.25% Cu, 0.7 to 1.3% Mn, 0.93 to 1.3% Mg, and≤0.25% Zn, and the balance aluminum with inevitable impurities. The number of intermetallic compound grains of≥1μm observed from the sheet surface is≥3,500 pieces/mm<SP>2</SP>. The 45°ear ratio in a formed cup drawn under the conditions meeting a blank diameter of 55 mm and a drawing ratio of 1.67 is≤3%. Further, (the average value of 0 to 180°ear heights)-(the average value of 45°ear heights)≤0.3 mm is satisfied. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
