Engineering Materials
Combined carbon in iron makes the metal

Soft and gives a fine grained crystalline structure
Soft and gives coarse grained crystalline structure
Hard and gives a coarse grained crystalline structure
Hard and gives a fine grained crystalline structure

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Engineering Materials
Carbon steel is

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

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