“…In addition to the many original papers in the literature, some of which will be referred fo below, four extensive reviews furnish valuable background information on the subject. [1][2][3][4] Hydrogen embrittlement is a quantitative phenomenon. That is, the proper combination of the various parameters results in loss of strength, and although the effect of one can be reproducibly studied by controlling certain variables, a generalized parametric picture is not available, and would probably be too complex for purposes of design or evaluation.…”