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Austenite
Metallic, non-magnetic allotrope of iron or a solid solution of iron, with an alloying element / From Wikipedia, the free encyclopedia
Not to be confused with Austinite.
This article is about the alloy and iron allotrope. For Jane Austen fans, see Janeite.
Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron with an alloying element.[1] In plain-carbon steel, austenite exists above the critical eutectoid temperature of 1000 K (727 °C); other alloys of steel have different eutectoid temperatures. The austenite allotrope is named after Sir William Chandler Roberts-Austen (1843–1902).[2] It exists at room temperature in some stainless steels due to the presence of nickel stabilizing the austenite at lower temperatures.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Iron_carbon_phase_diagram.svg/320px-Iron_carbon_phase_diagram.svg.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/IronAlfa%26IronGamma.svg/320px-IronAlfa%26IronGamma.svg.png)