The 5000 series of aluminum alloys, called Al-Mg alloys, use magnesium as the main part added to the metal. The magnesium amount is usually between 3% and 5%. These alloys are some of the lightest in the aluminum group. They are known for a very good balance of strength and weight. They cannot be heat-treated, so their strength comes from mixing the magnesium in rather than from heat treatment.

One important thing about 5000 series alloys is that they are very good at not getting damaged by rust, especially in water settings. This makes them great for places with tough conditions. Also, 5000 series aluminum alloys are used in many areas like hardware, signs, zippers, screens, shielding, rivets, nails, cars, boats, and building design.