Engineering Materials
Sulphur in cast iron

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

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Engineering Materials
Cyaniding is the process of

Dipping steel in cyanide bath
Reacting steel surface with cyanide salts
Obtaining cyanide salts
Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness

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