Martensitic steel is often used when high toughness Steel with high formability is required. When such steel is used in fusion experiments, a layer to protect against losses (diffusion) of Tritium is required. The invention is a production process in which these material attributes are achieved. In a sequence of steps, the basic steel material is coated, pressurized and further hardened to achieve these characteristics. The technology is ready for use in the non-­‐fusion domain and was patented by the inventors, Heike Glasbrenner, Kathleen Stein-­‐Fechner and Olaf Wedemeyer