If this helps, the structure of austenite is characterized by a "face-centered cubic lattice."
Like the others say, just see if the metal is magnetic. Austenite, by definition, is a non-magnetic solid solution of carbon or ferric carbide in gamma iron.
Mostly unstable below its critical temperature, austenite can be obtained from high carbon steels by rapid quenching from high temperatures. Or it can be obtained at room temperature, lower carbon steel, by adding nickel or manganese.
Known for its enhanced resistance to corrosion, austenite can exist in low or high carbon/nickel-chromium, or when manganese reaches 14% with either nickel-chromium or small percentages of nickel or molybdenum.
If you believe surface treatments may also help, just see:
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