Engineering Materials
Thermoplastic materials are those materials which

Are formed into shape under heat and pressure and results in a permanently hard product
Are flexible and can withstand considerable wear under suitable conditions
Do not become hard with the application of heat and pressure and no chemical change occurs
Are used as a friction lining for clutches and brakes

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Engineering Materials
Tungsten in steel

Improves wear resistance, cutting ability and toughness
Improves cutting ability and reduces hardenability
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Gives ductility, toughness, tensile strength and anti-corrosion properties

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