METALS

METALS

1. There are 2 types

   • Ferrous metals
     • Pure iron
       • Properties
         • -Greyish white colour. -Good magnetic properties. -Disadvantages: only melts at high temperatures; difficult to machine; fragile and brittle.
       • Uses
         • -Rarely white colour. -Used in electronics and electrical components.
     • Cast iron
       • Properties
         • Very hard and resistant.
       • Uses
         • Machine parts, casing for engines, stands for machines, pistons...
     • Steel
       • Properties
         • Very hard and resistant. Very resistant to traction. Easy to weld. Alloys with chrome and nickel to make stainless steel.
       • Uses
         • Structures in construction, car chassis, boats, trains...