Engineering Materials
The silicon steel is widely used for

Cutting tools
Motor car crankshafts
Generators and transformers in the form of laminated cores
Connecting rods

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Engineering Materials
White 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
Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron
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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Engineering Materials
Points of arrest for iron correspond to

Stages at which allotropic forms change
Stages at which properties do not change with increase in temperature
Stages at which further heating does not increase temperature for some time
There is nothing like points of arrest

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