Numerical simulation of precipitate evolution in ferritic-martensitic power plant steels

► Precipitation phenomena in P91 and P92 steels simulated using MatCalc. ► Simulation done for 1000,000 h of thermal exposure at 600 °C. ► MX and M23C6 are predicted to remain as major precipitates. ► Average size of MX precipitate varies between 10 and 50 nm. ► Average size M23C6 exceeds 100 nm.