ALUMINUM ALLOY PLATE FOR BATTERY LID FOR USE IN MOLDING OF INTEGRAL EXPLOSION-PROOF VALVE, AND METHOD FOR PRODUCING SAME

Aluminum alloy sheet for battery lid use having suitable strength and excellent in heat radiating ability, formability, and work softenability, which aluminum alloy sheet for battery lid use enabling formation of an integrated explosion-proof valve with little variation in operating pressure and excellent in cyclic fatigue resistance, and a method of production of the same are provided, the aluminum alloy sheet for battery lid use for forming an integrated explosion-proof valve having a component composition containing Fe: 1.05 to 1.50 mass%, Mn: 0.15 to 0.70 mass%, Ti: 0.002 to 0.15 mass%, and B: less than 0.05 mass%, having a balance of Al and impurities, having an Fe/Mn ratio restricted to 1.8 to 7.0, restricting, as impurities, Si to less than 0.40 mass%, Cu to less than 0.03 mass%, Mg to less than 0.05 mass%, and V to less than 0.03 mass%, having a tensile strength of 95 MPa or more, having a value of elongation of 40% or more, having a recrystallized structure, having a value of (TS95-TS90) of less than -4 MPa when defining a tensile strength after cold rolling by a rolling reduction of 90% as TS90 and defining a tensile strength after cold rolling by a rolling reduction of 95% as TS95, and having a value of elongation after cold rolling by a rolling reduction of 90% of 5.0% or more. Furthermore, an average grain size of the recrystallized grains of the recrystallized structure is preferably 15 to 30 µm.