1.1 本规范涵盖两种等级的锻造铪和铪合金带材、薄板和板材，如下所示: 1.1.1 核应用的R1级，以及 1.1.2 R3级，用于商业应用。 1.2 除非使用单个单位，例如腐蚀质量增量，单位为mg/dm 2. ，以英寸磅或国际单位制表示的数值应单独视为标准。每个系统中规定的数值并不完全相等；因此，每个系统都必须独立使用。SI值不能与英寸磅值混合。 1.3 以下注意事项仅适用于本规范的试验方法部分。 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers two grades of wrought hafnium and hafnium alloy strip, sheet, and plate as follows: 1.1.1 Grade R1 for nuclear applications, and 1.1.2 Grade R3 for commercial applications. 1.2 Unless a single unit is used, for example corrosion mass gain in mg/dm 2 , the values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. SI values cannot be mixed with inch-pound values. 1.3 The following precautionary caveat pertains only to the test method portions of this specification. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.