How to select chromium-molybdenum steel resistant to hydrogen corrosion
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According to the information provided, the maximum operating temperature for the commonly used chromium-molybdenum steel 15CrMo is 550°C, for 12Cr2Mo it is 575°C, and for 1Cr5Mo it is 600°C. I would like to ask what type of hydrogen-resistant steel should be chosen in an environment with a high hydrogen partial pressure and a temperature exceeding 600°C? Can a stainless steel with better heat resistance be used as a substitute?
A312 Gr.TP321 is a high-temperature resistant stainless steel, used as material for pipelines under high temperature and pressure in hydrogen-rich environments
For the projects I’ve worked on in the past, when temperatures exceed 500°C and high pressures are involved, 321 or 347 is chosen. I wonder if 310S could be used if the temperature is higher
321 can withstand high temperatures of 850°C; stainless steels are not in line with the material selection criteria specified by the Nelson curve for high-temperature hydrogen environments, right?