What is the kind of lattice in a delta iron?(a) Face centered cubic(b) Body centered cubic(c) Hexagonal closely packed(d) Tetragonal closely packedI have been asked this question during an interview for a job.My question comes from Cooling Curve for Pure Iron in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II

What is the kind of lattice in a delta iron?(a) Face centered cubic(b)

1.	What is the kind of lattice in a delta iron?(a) Face centered cubic(b) Body centered cubic(c) Hexagonal closely packed(d) Tetragonal closely packedI have been asked this question during an interview for a job.My question comes from Cooling Curve for Pure Iron in section Heat treatment of Metals and Alloys of Casting-Forming-Welding II
Answer» The correct choice is (B) Body centered CUBIC The best I can explain: The delta FORM of solid state of iron, which is formed on cooling the melt, has a body centered cubic LATTICE structure.

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