| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a bottle can which has excellent formability upon production of a bottle can and with which the bottle can produced has sufficient can body strength (buckling strength) without increasing the present sheet thickness/weight.SOLUTION: The aluminum alloy sheet has a composition comprising prescribed amounts of Cu, Mg, Mn, Fe and Si, and the balance Al with inevitable impurities, and in which the contents of Mn, Mg and Fe satisfy 5.450<{5.66×Mn(mass%)+0.667×Mg(mass%)+2.17×Fe(mass%)}<7.550. The elongation of the aluminum alloy sheet is 5.0 to 8.0%, also, the average aspect ratio of the crystal grains is ≥3.0, the 0.2% proof stress after heat treatment of the aluminum alloy sheet is >270 to 290N/mm, and the earing ratio of the aluminum alloy sheet is -2 to +3.5%. |
