metals

metals

1. properties

   • mechanical
     • hard
     • some are malleable
     • some are ductlie
     • though
       • resistant to brake
   • thermal
     • good conductors
     • they expand when temperature rises
     • can easily be soldered
   • electrical and magnetic
     • good electricity conductors
     • magnetic behaviour
     • can attract other metals
   • other
     • many rust easily
     • sound conductors
     • solid at room temperature
     • they're heavy and dense

2. classifying

   • ferrous
     • iron
       • percentage of carbon less than 0.1%
       • soft, ductil and malleable
       • used in medicine and electricity
     • steel
       • percentage of carbon from 0.1% to 2%
       • easy to solder and rust
       • can be forged
       • hard and though
     • cast iron
       • From 2% to 6.67% of carbon
       • very resitant to corrossion and te,mperature changes
       • easy to mould
       • difficult to solder
       • its hard but is also more brittle and less ductile
   • non-ferrous
     • copper
       • very good conductor of heat and electricity
       • highly resistant to corrosion
       • very ductile and malleable, easy to solder
     • Tin
       • it's veryductile and malleable when it's cold
       • very easy to work and melt
       • it is used as a filler metal for soft soldering
     • aluminlium
       • Very light
       • resistant to corrosion
       • good conductor of heat and electricity
       • very ductile and malleable
       • easy to sape
     • zinc
       • malleable and ductile
       • good conductor of heat and elctricity
       • highly resistant to corrosion and rust