metals Flashcards
what are the two types of metal extraction
smelting - heating ore until molten state
electrolysis - uses electricity to break down electrolytes
typical properties of metals
high melting points
good conductors of heat and electricity
high density
malleable
ductile
ferrous metals
cast iron
stainless steel
low carbon steel
HSS
Medium carbon steel
non ferrous metals
aluminium
zinc
silver
copper
tin
titanium
gold
alloys
nonferrous - brass bronze duralium and pewter
ferrous - stainless and die steel
aluminium
lightweight
ductile, malleable
corrosion res
elec and thermal
uses- drink cans, bike frames and packaging
copper
ductile, malleable,
tough
corrosion res,
good elec and thermal conductor
uses- electrical wire and water pipes
zinc
low melting point and good corrosion res
uses- galvanising steel as a protective coat
silver
malleable, ductile
good corrosion res
uses- jewelry and cutlery
gold
malleable, ductile
good corrosion res
uses- jewelry and electrical components
titanium
hard with similar strength to steel but is lighter
high corrosion res,
uses- space crafts, golf clubs
tin
ductile and malleable
is corrosion res
uses- soft solder
low carbon steel
ductile + malleable
high tensile strength,
tough
poor res to corrosion
uses- nuts and bolts
medium carbon steel
harder than LCS but is less ductile malleable and tough
uses- springs and garden tools
cast iron
hard outer shell but brittle core
is good under compression
uses- bins and lighting
stainless steel
tough and hard
corrosion res
uses- kitchenware and cutlery
HSS
hard and tough with high frictional heat res
uses- tool blades and drill bits
die steel
hard and tough
uses- fine press tools
bronze
tough and corrosion res
uses- statues and coins
brass
corrosion res,
good thermal and electrical conductor
uses- cast valves, boat fittings
duralumin
strength like LCS but is more lightweight,
ductile
becomes harder when worked with
uses- aircraft and vehicle parts
pewter
malleable
Low melting point
uses- flasks and photo frames
