Metal part 1
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Metal part 1

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  • Activity: Give examples of metal. Nails, can, kitchen utensils… Where does metal come from? Ores from the ground/sea bed
  • Activity: Give examples of metal. Nails, can, kitchen utensils… Where does metal come from? Ores from the ground/sea bed
  • Slides 9 Girders – support beams e.g bridges, building Brittle – easily cracked Wire ropes – Lathes – cutting machine e.g drilling machine
  • Slides 10 Mould dies –

Metal part 1 Metal part 1 Presentation Transcript

  • Starter Activity
    • Divide yourself into 3 groups and write and
    • draw at least 5 items/products made of metal
    • on the given post-it note
    • Duration: 10 mins
  • HEAT ELECTRICITY Toughness Hardness
  • FERROUS METAL NON- FERROUS METAL ALLOY
  • FERROUS METAL Rust Iron Attracted to magnet
  • FERROUS METAL High Harder
  • FERROUS METAL Name Properties Uses Low Carbon Steel (Mild Steel) (Carbon 0.1%-0.3%) (iron + carbon)
    • Fairly Strong
    • Rusts easily
    girders, car body panels, nuts and bolts, Food cans, car body panels Medium Carbon Steels (Carbon 0.3%-0.7%) (iron + carbon)
    • Harder than low carbon steel
    Nails and screws, metal chains, wire ropes, screwdriver blades, engine parts, bicycle wheel rims High Carbon Steel (tool steel) (Carbon 0.7%-1.3%) (iron + carbon)
    • Harder than medium carbon steel
    • Brittle
    Chisels, hammers, drills, files, lathe tools, taps and dies. High Speed Steel (Carbon 0.6%) (iron + carbon + tungsten + chromium)
    • Harder and more lasting than high carbon steel
    • Can retain its hardness at high temperature (700 °C)
    Cutting tools for lathes and drill bits
  • FERROUS METAL Name Properties Uses Stainless Steel (Carbon 0.2%) (iron + carbon + nickel + chromium)
    • Hard and tough
    • Polishes well
    • Resistant to corrosion and rust
    Cutlery, kitchen utensils and appliances, sinks, surgical instruments Cast Iron (Carbon 2%-4%) (iron + carbon)
    • Hard and brittle
    • Rusts easily
    Car engine blocks Manhole covers Engineer’s vice
  • Activity
    • Pick and choose the items that you have written
    • at the 1st activity to the correct column
    • Duration: 10 mins
  • Ferrous Metals CAST IRON
  • Ferrous Metals LOW CARBON STEEL
  • Ferrous Metals MEDIUM CARBON STEEL
  • Ferrous Metals HIGH CARBON STEEL
  • Ferrous Metals HIGH SPEED STEEL
  • Ferrous Metals STAINLESS STEEL