Using physical modeling methods on a Gleeble 3800-GTC machine, heat treatment of 40С2 steel bar clips was simulated. Modeling was performed on 6 mm diameter samples, which is acceptable for modeling the heat treatment of an 18 mm diameter bar due to the high hardenability of 40C2 steel. The study showed the effect of heat treatment modes on the structure formation. It was found that the best mechanical properties are achieved after preliminary heating with high-frequency currents (HFC) – 940±10℃, quenching – 860±10℃ and tempering – 350±10℃. The negative effect of low heating temperature with HFC in combination with low quenching temperature was also shown.