2:25 (Triple only) explain the uses of aluminium, copper, iron and steel in terms of their properties the types of steel will be limited to low-carbon (mild), high-carbon and stainless
|Aircrafts and cans||Low density / resists corrosion|
|Power cables||Conducts electricity / ductile|
|Pots and pans||Low density / strong (when alloyed) / good conductor of electricity and heat|
Aluminium resists corrosion because it has a very thin, but very strong, layer of aluminium oxide on the surface.
|Electrical wires||very good conductor of electricity and ductile|
|Pots and pans||very good conductor of heat / very unreactive / malleable|
|Water pipes||unreactive / malleable|
|Surfaces in hospitals||antimicrobial properties / malleable|
|Saucepans||Conducts heat / high melting point / malleable|
|Type of steel||Iron mixed with||Some uses|
|Mild steel||up to 0.25% carbon||nails, car bodies, ship building, girders|
|High-carbon steel||0.6%-1.2% carbon||cutting tools, masonry nails|
|Stainless steel||Chromium (and nickel)||cutlery, cooking utensils, kitchen sinks|
Mild steel is a strong material that can easily be hammered into various shapes (malleable). It rusts easily.
High-carbon steel is harder than mild steel but more brittle (not as malleable).
Stainless steel forms a strong, protective oxide layer so is very resistant to corrosion.