This study was conducted to compare the improvement in the properties of ductile iron with a newly developedaustempering process by conventional austempering. Patents have been obtained for this new method and thematerials produced (TPE Patent Number: TR 2020-22197 B and TR 2020-22199 B). The new surface hardeningaustempering process (HSA) and conventional austempering processes (A) were applied under similarconditions. The samples were austenitized at 900 C for 60 minutes and tempered at 350 C for 30 and 240minutes. While ductile iron material with an ausferritic structure was produced with conventional austempering,ductile iron with an ausferritic interior, but martensitic surfaces with HSA. As a result of the experiments, it wasseen that the properties of the DI samples were improved with both heat treatments, but the highest propertieswere obtained at the end of the HSA processes.Keywords: New heat treatment process, Hard surface austempering, Ductile iron.