64302 2025 eng poster 0 -- -- -- Duplex Stainless Steels (DSS) are an essential component used in the construction of transportation pipelines because of their many distinctive qualities. The choice of DSS for a particular hydrogen application mainly depends on its susceptibility level to Hydrogen Assisted Cracking (HAC). Several mechanisms have been proposed to describe the occurring microscale processes behind HAC, and these include metastable phase transformation, Hydrogen Enhanced Localized Plasticity (HELP), and Hydrogen Enhanced Decohesion (HEDE). This contribution describes the path to ascertain if DSS is suitable for high-pressure gaseous hydrogen applications. The interplay between several critical factors that result in HAC was examined using high-pressure gaseous hydrogen charging, Electron Backscatter Diffraction (EBSD), tensile testing and hydrogen concentration measurements using Carrier Gas Hot Extraction (CGHE). Third German-African Green Hydrogen Forum 2025 Bernburg (Saale), Germany 23.09.2025 24.09.2025 publish Reinhold Leo eng uncontrolled Hydrogen Assisted Cracking eng uncontrolled High Pressure Hydrogen eng uncontrolled Duplex Stainless Steels eng uncontrolled Hollow Specimen Technique Angewandte Physik 2 Prozess- und Anlagensicherheit 2.1 Sicherheit von Energieträgern 5 Werkstofftechnik 5.1 Mikrostruktur Design und Degradation 9 Komponentensicherheit 9.1 Komponenten für Energieträger Energie Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation Wasserstoff