1.1本试验方法涵盖了金属材料暴露于高压气态氢时对氢脆敏感性的定量测定。 1.2以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 本试验方法将为高压氢气应用中金属材料的选择提供指南。 P的值 他 /P H2 比率将相对指示氢中预期的机械性能退化的严重程度。

1.1 This test method covers the quantitative determination of the susceptibility of metallic materials to hydrogen embrittlement, when exposed to high pressure gaseous hydrogen. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== This test method will provide a guide for the choice of metallic materials for applications in high pressure hydrogen gas. The value of the P He /P H2 ratio will be a relative indication of the severity of degradation of the mechanical properties to be expected in hydrogen.