| Austenitic Manganese Steel is a type of steel that has a unique combination of good wear resistance and toughness. Based on its nature, Austenitic Manganese Steelsuitable as a jaw plate material. Nevertheless, it is found some failed jaw plates due to the carbides precipitates within the austenite boundaries that makes it brittle. Carbides can be used to improve mechanical properties of Austenitic Manganese Steelby forming a hardened austenite structure. This structure forming by dissolving carbides within austenite matrix through heat treatment followed by quenching. This research will discuss preliminary studyfor right holding time election to build the hardened austenite structure in order to reach its unique combination properties so it can be used as jaw plates material.Based on heat treatment and characterization process, it is known that the formed microstructure still contains carbide precipitateswithin the austenite matrix. These precipitates resulted in decreased macro-hardness and wear resistance after heat treatment at 1050ºC with a holding time of 55 minutes, 85 minutes, and 120 minutes. In addition, the remaining precipitates after the heat treatment obtained in the study were influenced by a disproportionate ratio of Mn / C due to errors in the process of specimen cutting from the foundry block. However, successful carbide precipitates dissolved in the austenite matrix causing increased toughness and microscale. |