The present paper describes experimental and numerical analyses for prediction of microstructure changes during hot plate rolling, which was conducted in Metal Forming Department Czestochowa, Technical Univ­ersity. Models describing kinetics of recrystallization of deformed austenite and precipitation of niobium car­bon-nitrides were evaluated in semi-industrial conditions. The main objective of simulation using finite element methods was to determine temperature and strain distributions in the roll gap and parameters of mi­crostructure through thickness of rolled plates. The experimental results were compared with computer simu­lation results, which showed that retained strains accumulated during the previous passes have a big in­fluence on stability of distribution of mechanical properties.