Hydrogen has become a promising environmentally friendly energy source and is of increasing relevance in energy and mobility industry. Due to its small atomic diameter hydrogen easily can diffuse through most metals. Steels can suffer hydrogen embrittlement due to uptake of atomic hydrogen into the lattice. Embrittlement cannot be predicted. This is the starting point of the present thesis. The goal was to establish a numerical finite element model to predict uptake and effusion of hydrogen in steels. When the critical hydrogen concentration of a steel is known, by simulation concentration profiles as function of time, temperature and microstructure (mainly trap distribution) can be generated quantitatively. A numerical model for hydrogen uptake and effusion based on a modified and improved Oriani model was introduced to Abaqus. The improved model was developed by Fischer and Svoboda and further extended. Boundary conditions were determined. By use of the simulation hydrogen distribution in components under different charging conditions (temperature and hydrogen partial pressure) can be estimated. This is possible also for experimentally complex conditions such as 600 °C and 1000 bar of hydrogen pressure.