The Application of Liquid Hydrogen project explores integrating liquid hydrogen as an energy carrier and superconductors for electricity transmission within a hybrid pipeline. This study evaluates material performance under cryogenic conditions and hydrogen exposure using in-situ tensile testing of hollow cylindrical specimens. Tests conducted on austenitic steel, copper, and ferritic steel at pressures up to 200 bars and temperatures down to cryogenic levels revealed that gas type, pressure, and temperature influence material strength and ductility. Fractographic analysis showed varying embrittlement levels due to hydrogen. The findings underscore the impact of hydrogen on material properties and the potential of in-situ methods for advancing material performance understanding.