Engineering Materials
Gamma iron exits at following temperature

Between 910°C and 1400°C
Room temperature
Between 1400°C and 1539°C
Near melting point

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Engineering Materials
Free carbon in iron makes the metal

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

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