Many pure metals are too soft for many uses. They can be made harder by adding another element to the pure metal, so forming an alloy. This explains why an alloy often has more uses than the pure elements it is made from.
Pure iron, for example, is very soft. Adding a small amount of tungsten to iron makes tool steel, which is harder than pure iron. Steels are examples of alloys. There are many types of steel.
|Mild steel||Carbon and iron||Easy to bend and pull into wires|
|Tool steel||Tungsten and iron||Hard, can be heated to high temperatures|
|Stainless steel||Chromium and iron||Hard, does not rust easily|