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DT GCSE > Metals and alloys > Flashcards

Metals and alloys Flashcards

1
Q

What are the 2 groups metals are placed in

A

ferrous and non- ferrous

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2
Q

what are ferrous metals

A

metals that contain iron and almost all are magnetic

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3
Q

Ferrous metal properties

A
  • able to rust
  • finishes applied to prevent rusting
  • high strength and hardness
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4
Q

Examples of ferrous metals

A

Cast iron
Low Carbon steel
High carbon steel

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5
Q

Cast iron steel properties and uses

A
  • made of carbon and silicon
  • Very strong if compressed
  • Brittle ( easily damaged) and not malleable ( unable to be shaped)
  • Used in vices, car breaks, discs
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6
Q

Low carbon steel (Mild steel) properties and uses

A
  • Strong
  • Cheap
  • Rusts easily, can’t be hardened
  • Used in screws, bolts, nails
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7
Q

High carbon steel ( Tool steel)

A
  • Harder than low carbon steel and can be hardened
  • Not easy to work with
  • Can rust
  • Used in tools like drills, chisels, saws
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8
Q

What are non - ferrous metals

A

metals which do not contain iron, therefore do not rust - e.g.- gold, silver zinc

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9
Q

examples of non- ferrous metals

A 
Aluminium
Brass
Copper
Tin
Zinc
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10
Q

Aluminium properties and uses

A
  • Lightweight
  • Corrosion resistant
  • expensive, not as strong as steel
  • good strength to weight ratio
  • hard to join
  • Used in ladders
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11
Q

Brass properties and uses

A
  • 65% copper +35% zinc
  • Strong
  • Corrosion resistant
  • malleable
  • ductile
  • used in taps, electrical parts
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12
Q

Copper properties and uses

A
  • Relatively soft
  • Malleable
  • Ductile
  • Good electrical conductor
  • Used in electrical wires and pipes
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13
Q

Tin properties ad uses

A
  • Soft
  • Ductile
  • Malleable
  • Low melting point
  • Corrosion resistant
  • Used in foil, tin cans
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14
Q

Zinc properties and uses

A
  • Not very strong
  • Corrosion resistant
  • Used in coating steel on nails, buckets and watering cans to prevent rusting
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15
Q

Examples of alloys

A

Brass
Stainless steel
High speed steel

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16
Q

High speed steel properties and uses

A
  • contains iron, carbon and other metals including chromium, tungsten, vanadium
  • keeps its hardness when heated to high temperatures
  • used in high speed cutting tools that get hot when used
17
Q

Stainless steel properties and uses

A

( iron + carbon +chromium + nickel)

  • Chromium and nickel added to cast iron and mild steel to strengthen, toughen and increase ductility and decreasing rust
  • Used in surgical equipment, sinks, cutlery, jewellery

DT GCSE (26 decks)

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