01 prop. n. an aluminum-based alloy which is both light and strong, containing 4 per cent of copper and 0.5 per cent of magnesium and smaller amounts o…
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an aluminum-based alloy which is both light and strong, containing 4 per cent of copper and 0.5 per cent of magnesium and smaller amounts of iron, manganese, and silicon. It hardens with aging at room temperature.