Microstructure of austenitic stainless steel is primarily monophasic, i.e. austenitic. However, precipitation of the ferrite in the austenite matrix is possible depending on the chemical composition of steel. Ferrite is stable on room temperature but it transforms into phase, carbides and austenite during heat treatment. In this work, the results of analysis of influence of temperature and time on decomposition of ferrite are presented. Magnetic induction method, microstructure and hardness analyses were used for testing the degree of decomposition of the ferrite. Analysis of results showed that increase in temperature and time increases the degree of decomposition of ferrite.
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