The plate-like morphology of M23C6 carbide precipitated around undissolved NbC particles in a stabilized austenitic stainless steel has been studied by transmission electron microscopy. This precipitation occurred during high temperature ageing of the specimens which had previously been quenched in water from 1550 K. These carbide plates that are characterized by {111}-and {101}-type interfaces have a cube-cube orientation relationship with austenite and lie on {110} austenite planes. Such precipitation was not commonly observed in specimens that were deformed prior to ageing. The possible mechanisms for the nucleation and growth of these precipitates are discussed.