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Delta-iron occurs between the temperature ranges of

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Delta-iron occurs between the temperature ranges of

Answer & Solution
Correct Answer: Option D
As molten iron cools down, it solidifies at 1,538°C (2,800°F) into its δ allotrope, which has a body-centered cubic (BCC) crystal structure. δ-iron can dissolve as much as 0.08% of carbon by mass at 1,475°C.
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