Aluminium

Aluminium or aluminum is a chemical element; it has symbol Al and atomic number 13. It has a density lower than other common metals, about one-third that of steel. Aluminium has a great affinity toward oxygen, forming a protective layer of oxide on the surface when exposed to air.

It visually resembles silver, both in its color and in its great ability to reflect light.
It is soft, nonmagnetic, and ductile.
It has one stable isotope, 27Al, which is highly abundant, making aluminium the 12th-most abundant element in the universe.

Back to Metals & Materials →

Source: Wikipedia · Image: Wikimedia Commons · CC BY 3.0

CUTANDWELD

Metal, mastered — welding techniques, cutting and fabrication guides, plus handy everyday calculators.

Get new guides by emailOccasional emails. No spam. Unsubscribe anytime.

InformationAbout Contact Privacy Policy Terms of Service Disclaimer Affiliate Disclosure Cookie Policy

Every exhibit, image, fact, and figure is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.