Engineering Materials
Sulphur in cast iron

Make the iron white and hard
Increases hardness and brittleness
Aids fusibility and fluidity
Makes the iron soft and easily machinable

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Engineering Materials
Amorphous material is one

Which is not attacked by phosphorous
In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
Which emits fumes on melting
In which atoms align themselves in a geometric pattern upon solidification

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