Hardness is a material physical property that needs to be known to apply on steel HRPS. Each treatment given to the HRPS steel can change its physical properties, since the treatment given by the microstructure on steel HRPS will change. This study is carried out by means of a 55 mm and 60 mm bended HRPS steel, which then applied the quench and temper heat. The next step is by analyzing the hardness of a material at each point using Hardness Vickers tester. The hardness value at each point with distance per 1mm is started from the curve point due to bending. Hardness is identified from the nature of the changes indicated by the hardness test data. The results show that, there is an increasing hardness level resulted from the heating level. The quench-temper heat treatment process on the HRPS steel has a clear effect on structural changes and mechanical properties of the HRPS steel. In addition, bending treatment with different angles affects the hardness value on the steel HRPS.
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