The main aim of this thesis is to simulate solid state metallurgical processes like quenching and tempering in steels. The thesis consists of two parts. In the first part steel hardenability by end quenching test (Jominy test) was simulated and in the second part a quenching and self-tempering process was simulated. The steel used for the first simulation is C45 which is medium carbon steel with carbon content of about 0.5%. Jominy test is used to check hardenability of steel using a standard specimen of diameter 25 mm and length 100 mm. The specimen is heated at around 900 [deg C] and then quenched at one end using water.