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[aw-stuh-nahyt] /ˈɔ stəˌnaɪt/
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. 2015.
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Examples from the web for austenite
  • 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.
British Dictionary definitions for austenite


a solid solution of carbon in face-centred-cubic gamma iron, usually existing above 723°C
the gamma phase of iron, stabilized at low temperatures by the addition of such elements as nickel
Derived Forms
austenitic (ˌɔːstəˈnɪtɪk) adjective
Word Origin
C20: named after Sir William C. Roberts-Austen (1843–1902), English metallurgist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for austenite

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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