| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an aluminum sheet without causing any wrinkles and cracks even if the contraction ratio of the diameter of a mouth part to the diameter of a barrel part in a bottle consisting of one-piece structure is controlled to >=30%. SOLUTION: The aluminum sheet essentially consisting of Al is used for a bottle can 1 in which a barrel part 2, a neck part 3 and a mouth part 4 provided with a screw part 5 are integrally formed, and the contraction ratio of the diameter D2 of the mouth part 4 to the diameter D1 of the barrel part 2 is >=30%. The aluminum sheet has a composition containing, by mass, 0.2 to 0.7% Fe, 0.1 to 0.3% Si, 0.5 to 1.2% Mn and 0.5 to 1.2% Mg, and the balance Al with inevitable impurities, and whose proof stress (0.2% proof stress) after baking is 220 to 250 N/mm<2> .</p> |
