Alloys (T)

• What is the definition of an alloy?

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

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

  Different sized atoms disrupt atomic layers
• What are the components of bronze?

  Copper and tin
• Why is bronze used for statues?

  Because it is extremely hard and corrosion-resistant
• What are the components of brass?

  Copper and zinc
• Why is brass used for musical instruments?

  Because it can be formed into different shapes
• What metals are commonly alloyed with gold?

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

  It indicates the percentage of gold in the alloy
• What is the purity of 24 karat gold?

  100% pure gold
• What is the purity of 18 karat gold?

  75% 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 elements are found in stainless steel?

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

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

  They are low density
• Why are aluminium alloys useful in aeroplane bodies?

  Due to their low density
• What are the uses of different forms of steel?

  • High carbon steel: cutting tools (chisels)
  • Low carbon steel: car bodies
  • Stainless steel: kitchen utensils, medical instruments
• What are the uses of bronze, brass, and gold alloys?

  • Bronze: statues
  • Brass: musical instruments, door handles
  • Gold alloys: jewelry