Metals

1
Metals

• All metals belong to one of these two groups.
• Ferrous metals are metals, which are mainly made
  of iron with small amounts of other metals or
  elements added in order to give the correct
  properties. Almost all ferrous metals are
  magnetic and can be picked up with a magnet.
  These metals rust or oxidise if not treated as
  they contain iron.
• Non-Ferrous metals are those metals, which do not
  contain iron. These metals are not magnetic and
  cannot be attracted by a magnet. Examples of
  these are aluminium, copper, lead, zinc and tin.
  These metals do not oxidise as they do not
  contain iron.

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Pure metals and alloys

• All metals fall into two categories. They can
  either be pure metals or alloys.
• A pure metal consists of a single element, which
  means that it is a metal only having one type of
  atom in it. The most commonly used pure metals
  are aluminium, copper, iron, lead, zinc, tin,
  silver and gold.
• An alloy is a mixture of two or more pure
  elements. Pure metals sometimes lack certain
  required properties. To create these properties a
  number of these pure metals are combined
  together.
• Pure aluminium is rarely used because it is too
  soft. It is normally mixed with other metals,
  which produce aluminium alloys that are even
  stronger than mild steel, are resistant to
  corrosion but still retain the lightness of
  aluminium.

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Name the metals?

• Mild steel. It is used for general structural
  work for example girders, nuts, bolts, screws,
  car body panels and non-cutting tools.
• If mild steel is coated in tin it is called Tin
  plate.
• If mild steel is coated in zinc it is called
  Galvanised sheet.
• If mild steel is coated in lead it is called
  Terne sheet.

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Name the metals?

• Aluminium. It is used to make car bodies, cooking
  utensils, engine cylinder heads, window frames,
  insulation, foil food wrapping and boats.
• It is mixed with copper to make an alloy. This
  alloy is much stronger than pure aluminium.
• Duralumin is used to make parts of aircraft.

Name the metal being poured? To give you a clue
it is used to make window frames and aircraft.
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Name the metals?

• Medium carbon steel. It is used to also make
  garden tools, axles and shafts.

Name the metal used to make the rear sprocket on
this bike?
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Name the metals?

• High Carbon Steel. It is used to make hand tools,
  chisels and punches. It is also called tool
  steel.

Name the metal used to make this centre punch?
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