What is the specific gravity of aluminum?

The specific gravity of aluminum ranges from 2.55 to 2.8. Melted aluminum has a lower specific gravity, while aluminum foil is on the higher end of this range.

Specific gravity is calculated by dividing the density of a substance, in this case aluminum, to the density of a reference substance. Pure water at 39.2 degrees Fahrenheit, which is the temperature at which water is the most dense, is often used as the reference.

Specific gravity is often used in industrial settings to determine the composition of unknown substances. However, temperature and air pressure affect the specific gravity of any substance, as do any impurities contained within them.