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

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

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