In this research paper, the focus is on SUS316 and SUS316L, types of austenitic stainless steel, as materials to be used for hydrogen refueling station (HRS) equipment from which hydrogen will be filled into 70 MPa onboard containers. Data on its characteristics in high-pressure-hydrogen environments, as well as methods of quantitative evaluation, were examined. On the basis of data, criteria for selecting materials and the standards to be used for HRS equipment were established.

The results indicate that the temperature ranges in which SUS316 and SUS316L can be used for HRS equipment with a hydrogen pressure of ≤82 MPa are as follows.

If the actual reduction of area of 75% is ensured, SUS316 and SUS316L can be used in the temperature ranges between −45 and 250 °C for a Ni equivalent of ≥28.5%, between −10 and 250 °C for a Ni equivalent of ≥27.4%, and between 20 and 250 °C for a Ni equivalent of ≥26.3%.

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