SOLUTION

Austenite, solid solution of carbon and other constituents in a particular form of iron known as γ (gamma) iron. This is a face-centered cubic structure formed when the iron is heated above 910° C (1,670° F).

Austenite, a gamma form of iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron, with an alloying element.