| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a bottle-shaped beverage can, which is superior in strength, in ironing-formability, a trimming property, a necking property and bendability at a tapping part, and to provide a manufacturing method therefor. <P>SOLUTION: The aluminum alloy sheet is used for a bottle-shaped beverage can that has integrally formed of a can bottom, a sack body having a neck part, and the tapping part which is worked into a curling shape; comprises 0.8-1.5 mass% Mg, 0.7-1.5 mass% Mn, 0.10-0.25 mass% Cu, 0.1-0.4 mass% Si, 0.2-0.6 mass% Fe, and the balance Al with unavoidable impurities; has crystal grains with an average grain size of 40μm or less in a long-transverse direction of the sheet; and further has the Lankford value (r-value) of 0.7 or more on average according to expression (1): r<SB>ave</SB>=(r<SB>0°</SB>+r<SB>90°</SB>+2r<SB>45°</SB>)/4, and a planar anisotropyΔr of -0.15 to +0.05 according to expression (2) for the r-value:Δr=(r<SB>0°</SB>+r<SB>90°</SB>)/2-r<SB>45°</SB>. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
