This study investigates the deformation behavior of a medium���high carbon Mn-Si-Cr alloyed steel using hot compression tests. The tests were performed on a Gleeble 1500D thermomechanical simulator with a temperature range of 950���1150����C and a strain rate range of 0.005���5��s���1. The processing parameters (i.e., temperature T, strain rate ���� , and strain ��) influenced the flow softening behavior of the material. The dynamic recrystallization occurred during hot deformation. Correlations between the Zener���Hollomon parameter and the size and the volume fraction of new recrystallized grains were developed. These findings are described using mathematical models. The strain-compensated Arrhenius-type constitutive model and the multiple-linear model were developed based on the true stress���strain curves we obtained. A comparative study was performed in order to measure the validity of the two models in representing hot deformation behavior. Both models were shown to accurately predict flow stress across a range of conditions, reflecting the characteristics of true stress���strain curves by exhibiting work hardening, dynamic recovery, and dynamic recrystallization. The empirical multiple-linear mathematical model was shown to be more efficient and accurate when calculating the hot deformation behavior of steel at elevated temperatures.