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Ultra-High Strength Steels (UHSSs) have been widely used to reduce car body weight and to increase crashworthiness of new generation vehicles. To manufacture such components, hot stamping or press hardening process was developed, in which sheet metal forming at high temperature and quenching procedure were performed successively in a single step. Generally, hot stamped parts exhibit exceptionally high strength properties and low springback effect. In this work, a direct hot stamping process of boron-alloyed steel with a thickness of 1.4 mm was investigated. Temperature evolutions on blank and tools were determined during the experiments. Afterwards, microstructure analysis, hardness measurement and tensile test for different locations, namely, at the bottom and flange of the formed samples were carried out. It was found that final parts after the hot forming mostly showed a fully martensitic microstructure.