Common alloys used for aluminum include 1000 series, which are nearly pure aluminum. The 2000 series, which contains copper, is known for its strength. The 3000 series, with manganese, is good for its formability. The 5000 series, which contains magnesium, offers good strength and welding characteristics. The 6000 series, which includes silicon and magnesium, is known for its strength and resistance to corrosion. Lastly, the 7000 series, which contains zinc, is the strongest and most commonly used for structural applications. These alloys are chosen for their specific properties such as strength, corrosion resistance, and workability, depending on the application.