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An aluminum alloy foil is provided that is used as a material of a container and that achieves desired heat-resistant properties, enabling the container to withstand repeated use. The aluminum alloy foil is configured so as to: maintain a tensile strength of at least 120 N/mm2 and have an elongation of at least 2.0% when subjected to softening treatment at 150° C. for a maximum of 240 minutes; maintain a tensile strength of at least 100 N/mm2 and have an elongation of at least 3.0% when subjected to softening treatment at 180° C. for a maximum of 240 minutes; and maintain a tensile strength of at least 90 N/mm2 and have an elongation of at least 3.0% when subjected to softening treatment at 200° C. for a maximum of 240 minutes.
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