Alloy

Alloys

An alloy is a material made by mixing two or more metals—or a metal with another element—to create a new substance with improved properties. Alloys are often stronger, lighter, or more resistant to rust than pure metals. For example, steel is an alloy of iron and carbon, and bronze is made from copper and tin. Alloy...

Have you ever noticed how gold jewelry sometimes has a slightly reddish or dull yellowish color? That’s because pure gold is often mixed with copper to make it stronger—this mixture is called an alloy. An alloy is a combination of two or more elements, and at least one of them is a metal.

Bronze, brass, and steel are examples of alloys, an...