Ferrous Metal and Non-Ferrous Metal for Design and Technology

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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 –
  • Statue
  • Ferrous Metal and Non-Ferrous Metal for Design and Technology

    1. 1. 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
    2. 2. HEAT ELECTRICITY Toughness Hardness
    3. 3. FERROUS METAL NON- FERROUS METAL ALLOYALLOY
    4. 4. FERROUS METAL Rust Iron Attracted to magnet
    5. 5. FERROUS METAL High Harder
    6. 6. FERROUS METALName 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
    7. 7. FERROUS METALName 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
    8. 8. Activity Pick and choose the items that you have written at the 1st activity to the correct column Duration: 10 mins
    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
    15. 15. NON-FERROUS METALSNON-FERROUS METALS Non-ferrous metals do not have iron in them. Therefore they do not rust and are not attracted to magnets.
    16. 16. NON-FERROUS METALSNON-FERROUS METALS Most non-ferrous metals are soft. By ‘alloying’ with other materials, they form new materials and become stronger for further applications. These are known also as ‘non-ferrous alloys’.
    17. 17. NON-FERROUS METALSNON-FERROUS METALS Name Properties Uses ALUMINIUMALUMINIUM (Pure metal) •Greyish-white colour •The second most widely used metal after steel •Lightweight •Good conductor of electricity and heat •Easy to cut and machine. Engine parts Cooking foil Drink cans Overhead power cables Road signs COPPERCOPPER (Pure metal) •Reddish-brown colour •Ductile •Malleable •Excellent conductor of heat and electricity Electrical fitting and wires Tips of soldering iron Domestic water pipes Cooking utensils
    18. 18. NON-FERROUS METALSNON-FERROUS METALS Name Properties Uses TINTIN (Pure metal) •Silvery-white colour •Non-toxic •Soft Tinplate from which food cans are made Coating or printed circuit boards ZINCZINC (Pure metal) •Silvery-blue colour •Ductile but rather weak •Good corrosion resistance Manufacture of galvanised iron Batteries Rust-proof paints Roof LEADLEAD (Pure metal) •Bluish-grey colour when cut but surface changes quickly to a dull grey •Heavy but soft •Resistant to corrosion •Toxic Core of some batteries Can be mixed with other protection against x- rays and radiation Weights Solder
    19. 19. NON-FERROUS ALLOYSNON-FERROUS ALLOYS Name Properties Uses DURALUMINDURALUMIN (Alloy – mixture of aluminium, copper and manganese) •Silvery-white colour •Non-toxic •Soft Aircraft and vehicle parts Portable ladders Door and window frames Rivets BRASSBRASS (Alloy – mixture of copper and zinc) •Golden-yellow colour •Good conductor of heat and electricity •Easy to machine and solder Musical instruments Pins of electrical plugs Nuts, bolts and screws Hingers Decorative artefacts Locks Keys
    20. 20. NON-FERROUS ALLOYSNON-FERROUS ALLOYS Name Properties Uses BRONZEBRONZE (Alloy – mixture of copper and tin) •Reddish-yellow colour •Corrosion resistant •Easily machined ship propellers Bells Gears Bearings Statues PEWTERPEWTER (Alloy – mixture of copper, tin and antimony) •Silvery colour •Soft and malleable Ornaments such as plaques, vases, mugs and souvenirs
    21. 21. Non-Ferrous Metals ALUMINIUM
    22. 22. Non-Ferrous Metals COPPER
    23. 23. Non-Ferrous Metals TIN
    24. 24. Non-Ferrous Metals ZINC
    25. 25. Non-Ferrous Metals LEAD
    26. 26. Non-Ferrous Alloys DURALUMIN
    27. 27. Non-Ferrous Alloys BRASS
    28. 28. Non-Ferrous Alloys BRONZE
    29. 29. Non-Ferrous Alloys PEWTER

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