Researcher of our company Materiálový a metallurgický výzkum s.r.o. (MMV), Ing. Jan Kander, won second place in the best poster competition at the Metallography & Fractography 2025 conference with a poster aimed at evaluating the effect of high-pressure hydrogen gas on the mechanical properties of X-52, X-60 and X-70 pipeline steels using an in-situ slow tensile test in an autoclave developed at MMV. This success is a testament not only to the quality of the work carried out by MMV in cooperation with renowned research institutions, but also to the strong position of Czech research in the field of materials research. The research has revealed the possibility of using existing gas pipeline steels in the planned addition of hydrogen to natural gas or its full substitution.