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Wrought-aluminum alloys are identified by a four-digit system, where the first digit indicates the primary alloying element. For example, alloys with '1' as the first digit are at least 99 percent aluminum, while those starting with '2' are alloyed with copper, and '6' with magnesium and silicon.1

The properties of these alloys depend on their composition and temper. Alloying and heat treatment can significantly increase aluminum's strength and hardness. Common alloying elements include manganese, magnesium, copper, zinc, and silicon. These alloys are used in various applications, from beverage cans and cookware (3XXX alloys) to aircraft components and automotive parts (2XXX, 6XXX, and 7XXX alloys).1

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