| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a battery lid which enables a battery case lid to be press-formed integrally with a thin explosion preventive part without employing an annealing step in the production of the battery case lid using the aluminum alloy sheet as raw material. SOLUTION: The aluminum alloy sheet has a composition comprising, by mass, 1.15 to 1.35% Fe and 0.40 to 0.60% Mn, if required, further comprising 0.005 to 0.15% Ti or 0.005 to 0.15% Ti and 0.0005 to 0.05% B, and the balance Al with impurities wherein the content of Si is regulated to≤0.05%, Cu to≤0.05% and Mg to≤0.05%. The aluminum alloy sheet has structure in which the maximum width of crystal grains is controlled to≤100μm, and the average width thereof is controlled to≤25μm by adjusting production conditions. COPYRIGHT: (C)2009,JPO&INPIT |
