Standard and Vanadium enhanced 2.25Cr1Mo plate steels (ASTM A387 gr. 22 and A542 type D) are generally used in high-temperature and high-pressure hydrogen environments. In such environments, significant quantities of hydrogen are soluble in the steel. The influence of hydrogen on mechanical properties during a shut–down operation and on creep properties has been considered.

Mechanical property testing of steels exposed to the above stated environments was conducted in order to determine the effect of hydrogen. Tensile, Charpy V-Notch CVN, and fracture toughness values were determined after exposure to high pressure hydrogen at high temperatures, for base metal, heat-affected zone (HAZ), and weld metal specimens.

Subject
Materials, Fracture toughness, Hydrogen content, Charpy impact test, Hydrogen attack, Mechanical properties, Methane, Steel, Creep, Carbon, Weld metal, Ductility, Hydrogen
Keywords:
Hydrogen, 2.25Cr1Mo, 2.25Cr1MoV, hydrogen embrittlement, high-temperature hydrogen attack, Charpy test, creep, tensile properties, fracture toughness
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2008
Association for Materials Protection and Performance (AMPP)
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