noun Metallurgy.
a solid solution of carbon or of carbon and other elements in gamma iron, having a face-centered cubic lattice at all temperatures.
an allotrope of iron, stable between 910°C and 1400°C and having a face-centered cubic lattice; gamma iron.

1900–05; named after Sir W. C. Roberts-Austen (1843–1902), English metallurgist; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To austenite
World English Dictionary
austenite (ˈɔːstəˌnaɪt)
1.  a solid solution of carbon in face-centred-cubic gamma iron, usually existing above 723°C
2.  the gamma phase of iron, stabilized at low temperatures by the addition of such elements as nickel
[C20: named after Sir William C. Roberts-Austen (1843--1902), English metallurgist]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Encyclopedia Britannica


solid solution of carbon and other constituents in a particular form of iron known as gamma (gamma) iron. This is a face-centred cubic structure formed when iron is heated above 910 C (1,670 F); gamma iron becomes unstable at temperatures above 1,390 C (2,530 F). Austenite is an ingredient of a kind of stainless steel used for making cutlery, hospital and food-service equipment, and tableware.

Learn more about austenite with a free trial on

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
The grain size of the austenite did not significantly coarsen during service aging.
Some austenite will be retained in the martensite structure unless the steel is refrigerated.
The effect of this difference in transformation behavior was that austenite was retained in the weld deposit after tempering.
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature