Alloy as useful materials

• What is the definition of an alloy?

  An alloy contains a metal blended with other elements
• How is an alloy made?

  By melting metal and mixing in other elements
• Why are alloys generally harder than pure metals?

  Different sized atoms disrupt atomic layers
• What is bronze an alloy of?

  Copper and tin
• Why is bronze used for statues?

  Because it is extremely hard and corrosion-resistant
• What is brass an alloy of?

  Copper and zinc
• What are the uses of brass?

  Used for musical instruments and door handles
• Why is pure gold usually alloyed?

  Because pure gold is too soft
• What metals are commonly used to alloy with gold?

  Silver, copper, and zinc
• What does the purity of gold rated in carats indicate?

  24 karat is 100% pure gold
• What is steel primarily made of?

  Iron and carbon
• What is high carbon steel known for?

  It is extremely hard but brittle
• What is high carbon steel used to make?

  Cutting tools such as chisels
• What is low-carbon steel known for?

  It is softer and easily shaped
• What is low-carbon steel used to make?

  Car bodies
• What additional metals are found in stainless steel?

  Chromium and nickel
• What is the advantage of stainless steel?

  It is hard and resistant to corrosion
• What is a key property of aluminium alloys?

  They are low density
• Where are aluminium alloys commonly used?

  In aeroplane bodies
• What are the properties and uses of bronze?

  • Alloy of copper and tin
  • Extremely hard and corrosion-resistant
  • Used for statues
• What are the properties and uses of brass?

  • Alloy of copper and zinc
  • Harder than pure copper
  • Used for musical instruments and door handles
• What are the properties and uses of steel?

  • Alloy of iron and carbon
  • High carbon steel: hard but brittle, used for cutting tools
  • Low carbon steel: softer, used for car bodies
  • Stainless steel: hard, resistant to corrosion
• What are the properties and uses of aluminium alloys?

  • Low density
  • Used in aeroplane bodies