| 摘要 |
An aluminum-magnesium alloy sheet having a high strength prior to baking treatment, and having a high bake softening resistance. Contains, as a percentage of mass, 2-5% magnesium, more than 0.05% and 1.5% or less iron, 0.05-1.5% manganese, and crystal grain refiner, the remainder comprising aluminum and inevitable impurities, and among the inevitable impurities, less than 0.20% silicon being contained, the total amount of iron and manganese being greater than 0.3%, the amount of iron dissolved in solid solution being 50 ppm or greater, 5000 or more intermetallic compounds with a circle-equivalent diameter of 1-6 µm existing per square millimeter, and the average diameter of the recrystallized grains being 20 µm or smaller. |
