Alloys (triple)

• Alloy


  A metal blended with other elements
• Alloys


  • Tend to be harder than pure metals
  • Atoms in an alloy are different sizes, disrupting the layers and preventing them from sliding
• Bronze


  An alloy of copper and tin
• Brass


  An alloy of copper and zinc
• Gold alloys


  Gold alloyed with silver, copper, and zinc to make it harder
• Karat


  Measure of gold purity, 24 karat is 100% pure gold, 18 karat is 75% gold
• Steel


  Alloy of iron containing specific amounts of carbon
• High carbon steel


  • Extremely hard but brittle
  • Used to make cutting tools like chisels
• Low carbon steel


  • Softer and more easily shaped
  • Used to make car bodies
• Stainless steel


  Steel containing chromium and nickel, hard and resistant to corrosion
• Aluminium alloys


  Low density, extremely useful e.g. in aeroplane bodies