4. METALS

4. METALS

1. Physical properties

   • Fusible
   • Strong
   • Ductile & malleable
   • Tough
   • Expansion & contraction
   • Magnetic
   • Plastic & elastic
   • Electrical, thermal & acoustic conductivity

2. Chemical properties

   • Oxidation

3. Ecological properties

   • Recycable & reusable
   • Toxic

4. Where & how metals are obtained

   • Suface mining
   • Underground mining

5. Metal classification

   • Ferrous
     • Pure iron
     • Steel
     • Cast iron
   • Non-ferrous
     • Light & ultralight metals
       • Aluminium
       • Titanium
     • Heavy metals
       • Lead
       • Zinc
       • Tin
       • Copper

6. Cutting, joining & finishing techniques

   • Cutting
   • Marking
   • Power tools for cutting
   • Drilling
   • Shaping & turning
   • Rough finishing