Usually produced from mining ore from the earth, then extracting the metal out of the rocks.
Ferrous Metals
Mostly iron, small quantities of other elements. Prone to rusting. Can be picked up by a magnet.
Non-Ferrous Metals
Do not contain any iron at all. Do not rust. Not attracted to magnet. E.g. copper
Alloys
Contain 2 or more metals, and sometimes other elements. Metals are carefully chosen and mixed to achive specific properties, which include the melting point. E.g. brass
Properties of Metals
Elastisity - the ability to regain its origional shape after been deformed.
Ductility - the ability to be stretched without breaking.
Malleability - the ability to be easily pressed, spread and hammered into shape.
Hardness - resistance to scratching, cutting and wear.
Work Hardness - when structure of metal changes as a result of repeated hammering or strain.
Brittleness - will break easily without bending.
Toughness - resistance to breaking, bending or deforming.
Tensile Strength - very strong when stretched.
Compressive Strength - very strong under pressure.
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