Engineering

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  • METALS
    • ALLOYS
    • NON FERROUS
      • silver(whitish grey)
        • resists corrosion, malleable,solders
          • jewellery
      • brass(yellow)
        • hard, tarnishes, conducts electricity
          • parts for electrical fittings
      • copper (reddish brown)
        • conducts electricity and heat, can be beaten intoshape
          • electrical wiring, pipes, kettles
      • lead (bluish grey)
        • soft, heavy, loses shape under pressure
          • pipes, batteries, roofing
      • aluminium (light grey)
        • soft, very light and malleable
          • window frames, aircraft, drinks cans
      • tin (silver)
        • soft, malleable
          • food cans
      • no iron, not magnetic, do not rust
    • FERROUS
      • stainless steel (silver when polished)
        • tough and resistant to rust
          • cutlery and medical equipment
      • wrought iron
        • tough, rust resistant
        • ornamental gates and railings
      • carbon steel
        • tough and can be hardened
          • cutting tools such as drills
      • cast iron
        • dull grey. strong but brittle
          • manhole covers, engines
      • mild steel
        • tough, rusts easily
          • used in schools and in general metal products such as nuts and bolts
      • contain iron, prone to rust, magnetic
    • - mixture of metals and other elements..
      • solder (grey)
        • 60%tin, 40%lead
          • low melting point, electrically conductive
            • circuit manufacture
      • pewter
        • tin and copper, non ferrous, dark grey, shinier grey when melted
          • jewellery, light fixtures, tankards
      • brass
        • copper and zinc
          • non ferrous, gold colour that darkens when oxidised with age
            • musical instruments

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