5.5 explain the uses of aluminium and iron, in terms of their properties.

Uses of aluminium and iron

Aluminium :

• aeroplane bodies: high strength-to-weight ratio
• overhead power cables: good conductor of electricity
• saucepans: good conductor of heat
• food cans: non-toxic
• window frames: resists corrosion

Iron

• car bodies: strong
• iron nails: strong
• ships, girders and bridges: strong