Hadfield Mn steel is known for its good wear performance; however, the so-called AHSS steels have demonstrated much better wear performance than Mn steel. Unlike the conventional HSS steels known for their single-phase ferritic microstructure, AHSS steels have a multiphase microstructure generated through carefully selected chemical composition and precisely controlled heating and cooling cycles. AHSS steels include three main generations: the 1st and 2nd generations that involve steels such as Dual-phase (DP), martensitic, and TRIP steels. However, in this project, the 3rd generation of AHSS steels is of interest and, more specifically, Q&P steels obtained via Quenching & Partitioning heat treatment. As they exhibited good wear performance in previous research work, two different cast steel compositions with high carbon content have been selected for Q&P heat treatments. The parameters of the latter, namely partitioning temperature and time have been varied. Afterward, the different obtained Q&P steels have been analyzed in terms of microstructure, hardness, and toughness. Afterward, the optimum Q&P steel has been selected for wear testing to analyze its wear performance and establish a comparison between this Q&P steel and Mn steel. It has been found that the structure of Q&P steel mainly composed of hard martensite exhibited better wear performance than the austenitic Mn steel before and after wear testing. However, Mn steel has demonstrated much better toughness than Q&P steels suggesting that it can resist more crack initiation when subjected to mechanical loads.