This work addresses selection of candidate materials for use as pipelines and storage tanks at distribution systems to support developing the infrastructure necessary to promote sustainable energy management via the hydrogen economy. Air and vacuum-melted 4340 and SA372 Grade J Class 70 steels, which were first copper plated and annealed, were analyzed to study the effects of hydrogen charging on its mechanical properties. Hydrogen charging increases the stiffness of 4340 steels by 3.4 to 7.8% and decreases the stiffness of SA372 alloy steel by 5.2%. Hydrogen charging results in decrease in strength of air-melted 4340 steel, increase in strength of vacuum-melted 4340 steel, and no significant change in the strength of SA372 steel; while it always leads to reduced ductility. Copper-plating has the ability to retain hydrogen concentration within the specimen. Finally, air-melted 4340 steel was found to hold maximum amounts of hydrogen followed by vacuum-melted 4340 and SA372 steels.
Effect of Hydrogen on the Mechanical Behavior of AISI 4340 and SA372 Steels
Einfluss von Wasserstoff auf das mechanische Verhalten der Stähle AISI 4340 und SA372
2010
8 Seiten, 3 Bilder, 4 Tabellen, 5 Quellen
Conference paper
English
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