Hot charging, a crucial practice in the steel rolling mills revolutionizes traditional reheating furnace operations by significantly enhancing energy efficiency and production throughput. During hot charging, billets are charged into furnace at a temperature of around 700 ℃ directly from continuous casting plant (CCP). In instances of hot billet charging discontinuity, the introduction of cold billets into the furnace is employed to ensure continuity. This paper discusses the study to assess the impact of simultaneous charging of hot and cold billets on life of mechanical components like shear pin and cardan shaft at Bar mill. The analysis leverages historical failure data as well as experimental trial. The trial was designed to evaluate the consequences of varying the number of cold-charged billets between hot-charged ones. Remarkably, during the investigation, no discernible correlation emerged between component failures and the torque data associated with the mill stands. Nevertheless, the results indicate that increase in cold-charged billets inside the furnace, peak torque values increase reaching a maximum of around 30%. The increase in peak torque is primarily occurring during roughing operations in the initial four stands, compared to peak torque values observed during hot-charged billets. The results indicate that peak torque values during the rolling of billets charged simultaneously were consistently below the established threshold limit across all stands. On the basis of the study, a disposition of charging of mixed billets has been designed to mitigate the variation in peak torque between hot and cold billets.