Engineering Materials
Recrystallization temperature is one

At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated
At which change of allotropic form takes place
At which crystals first start forming from molten metal when it is cooled
At which crystals grow bigger in size

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Engineering Materials
Carbon steel is

Extensively used for making cutting tools
An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Refined from cast iron
Made by adding carbon in steel

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Engineering Materials
Cyaniding is the process of

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

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