The 1000 Series aluminum alloys have at least 99% aluminum and do not include major alloying elements. These types are known for their strong resistance to corrosion. They also have good thermal and electrical conductivity. However, their mechanical properties are low. These alloys are easy to work with and cannot be heat treated.

The most common type is 1100 aluminum. This aluminum is almost pure and soft. It has good flexibility and is easy to work with. It fits well for jobs that need a lot of shaping since it gets stronger more slowly during this. Also, 1100 aluminum is the best kind for welding among all aluminum alloys.