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To clarify the usefulness of the safety factor multiplier method for Cr–Mo steel in the CHMC1-2014 standard for hydrogen-service components, slow-strain-rate tests of smooth and notched specimens and fatigue tests of notched specimens were performed in air and in 115 MPa hydrogen gas. The series of tests determined a safety factor multiplier of ≈3.0, which allowed only quite small design stresses...
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