Abstract Kinetics of crystallization in the molecular dynamics model of aluminum has been studied. Data obtained concerning nucleation rates, growth velocities and structure of nanocrystals of different sizes are discussed. Local measurements of energies of atom interaction are fulfilled. The melting heat dependences on temperature and crystal size are determined. The differences in entropy and chemical potentials of coexistent phases are calculated. The question concerning mechanism of crystal growth from an amorphous phase is also discussed. A model for the analytical description of growth of very small crystals is proposed.