Engineering Materials
Acidic solution is one which has pH value

Less than 7
Equal to 7
Greater than 7
pH value has nothing to do with neutral solution

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Engineering Materials
Tungsten in steel

Improves cutting ability and reduces hardenability
Improves wear resistance, cutting ability and toughness
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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Engineering Materials
Thermoplastic materials are those materials which

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

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Engineering Materials
Ductile cast iron

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
Is produced by annealing process. It is soft, tough and easily machined metal
Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material

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