hardwoods, metals and plastic: properties and uses

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Hardwood
shed leaves in summer
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Beech
withstands weather conditions- chairs, toys and flooring
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Ash
very flexible and finishes well - hockey sticks, sports equipment
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Elm
warps easily, cross grain makes it difficult to work-indoor and outdoor furniture
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teak
expensive,natrual oils make it resistant to fire-lab benches
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ferrous metals
contain iron- will rust
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alloy
mixture of 2 or more elements
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cast iron
hard outside and soft inside, canno be bent or forged- vices, crushing machines
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mild steel
malleable,corrodes easily- car bodies, nails and screws
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high- carbon steel
hard, tough not ductile- taps,dies,screwdrivers, hammers
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stainless steel
does not corrode, difficult to work - sink,dishes,cutlery
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high-tensile steel
hard,tough- engine parts, turbines and gears
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non-ferrous metals
do not contain iron
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duralumin
ductile, hard when worked,light- aircraft and car parts
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gliding metal
attractive, solers easily - jewellery, metalwork
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brass
god conductor, resistance to corrson - coins, valves, bearings
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copper
mallable,goood conductor- circuits, conducts well
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tinplate
non-toxic, bends well, strong - cans, light metal work
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thermoplastics
can be heated again and again and will return to its original shape
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LDPE
range of colours, good insulator- squeezy boottles, bags
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HDPE
range of colours, stiff, high impact strength - milk crates, buckets
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UPVc
chemical and weather resistance - pipes, window frames
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Polystyrene
water resistaance, safe with food, hard,stiff -dispsable cups, food containers
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Polypropylene
can be sterillised, resistant to work faitigue - syringes, string, containers
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Nylon
resistant to chemicals, hard, tough - clothing, combs
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Acrylic
scratches easily, durable, cheaper alternative to glass - perspex, illuminated signs
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ABS
hard, tough, good appearance- lego, helmets
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thermosetting plastics
can oly be heated and modellde once
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Urea- Formaldehyde
good insulator, brittle,range of colours- wood glue, white electrical fittings
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Melamine- fomaldehyde
range of colours, oudourless- tableware,laminates
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Phenol formaldehyde
stiff, brittle, heat-resistant- saucepan and kettle handles
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Epoxy resin
good insulator, resits heat- bending, adhesive
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polyester resin
becomes tough with glass fibre- car bodies,chair shells
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Other cards in this set

Card 2

Front

withstands weather conditions- chairs, toys and flooring

Back

Beech

Card 3

Front

very flexible and finishes well - hockey sticks, sports equipment

Back

Preview of the back of card 3

Card 4

Front

warps easily, cross grain makes it difficult to work-indoor and outdoor furniture

Back

Preview of the back of card 4

Card 5

Front

expensive,natrual oils make it resistant to fire-lab benches

Back

Preview of the back of card 5
View more cards

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