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Subject on This Issue:
* Steels & Properties
* Heat Treatment



Crystal Structure of Pure Iron



Martensite is a body-centered cubic form of iron in which some carbon is dissolved. Martensite forms during quenching, when face centered cubic austenite changes to the body centered cubic structure without the precipitation of cementite Instead, the carbon is retained in the iron crystal structure, which is stretched slightly so that it is no longer cubic.

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