Properties of Materials

Useful Resistant Materials

Resistant Materials

Types of

What are they

Examples.

Metal

Elements

All pure metals

Aluminium, Copper, Tin, Zinc

Ferrous Alloys

These are a mixture of iron and other materials such as carbon, tungsten etc

Mild Steel

Tool Steel

Stainless steel

Cast Iron

Non Ferrous Alloys

These metals contain no iron in them

Aluminium Alloys

Brass, Solder.

Wood

Hardwoods

In U.K. broad leaved trees are hardwoods and trees with needle like leaves are softwoods. Lots of softwoods are treated for longer useful life.

Commonly known hardwoods are ash, beech, mahogany and oak.

Softwoods

Scotch Pine and Spruce are softwoods used in many everyday  applications. 

Manufactured Boards

These are wood  made by man from both hardwoods and softwoods

Mdf is very often used in lower school products as is plywood.

Plastic

Thermoplastics

These plastics soften when heated. Heat can be used to change their shape

Many everyday products are made from these thermoplastics.

 

Acrylic, pvc, nylon, polystyrene, expanded polystyrene and

Thermosets

These once they have been moulded into a shape would rather smoulder or burn or ignite when subject to high temperatures.

Their   characteristic of not softening when heated make them useful for saucepan handles and worktop laminates. Melamine, UF

Smart Materials

 

‘Smart’ materials respond in a certain predictable ways to changes in temperature, light, or pressure: These responses can be put to good effect because they occur predictably in response to stimuli that are input to them..

 

examples are shape memory alloy (SMA) such as Nitinol , polymorph, a low temperature setting plastic and  modern materials in traditional applications such as  the use of carbon fibre in fishing rods and kevlar in safety protection helmets;  Plastazotes which are nitrogen blown inert foams.