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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
Plastic	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.