PR276-23111-R01 Terminology on the Effect of Hydrogen on Steel

As standards discussions progress covering hydrogen transmission by pipeline, and new test data become available, it is important there exists a common understanding of the key terms and nomenclature associated with the various forms of hydrogen damage and the mechanisms of hydrogen embrittlement. A glossary of terms and descriptions of typical test methods and nomenclature are provided to enhance communication between individuals involved in discussions of the effects of hydrogen on pipeline steels. Differences will always exist in definitions of terms, particularly between various industries. However, the information provided here tries to provide the broadest possible usage, with particular emphasis on the pipeline community.