1.1 本规范涵盖热加工或冷加工铪棒和线材。 1.2 本规范包含两个材料等级，一个专门用于核应用（R1级）和一个用于商业合金应用（R3级）。 1.3 涵盖的产品包括: 1.3.1 杆 3. / 8. 至1英寸。直径（9.5至25 mm）。 1.3.2 电线小于 3. / 8. 在里面直径（9.5 mm）。 1.4 例如，除非使用单个装置，否则腐蚀质量增益（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值。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。 SI值不能与英寸-磅值混合。 1.5 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、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 15.1 为了确定是否符合下表所列特性要求的规定限值，应按照实践中的舍入方法对观察值或计算值进行舍入 E29年 . 所有物 观察到的四舍五入单位 或计算值 化学成分和公差（以小数表示时） 指定极限数字最后右侧位置的最近单位 抗拉强度和屈服强度 最接近1000 psi（10 MPa） 伸长率 最近的1 %

1.1 This specification covers hot- or cold-worked hafnium rod and wire. 1.2 This specification contains two material grades, one specifically for nuclear applications (Grade R1) and one for commercial alloying applications (Grade R3). 1.3 The products covered include the following: 1.3.1 Rod 3 / 8 to 1 in. (9.5 to 25 mm) in diameter. 1.3.2 Wire less than 3 / 8 in. (9.5 mm) in diameter. 1.4 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. 1.5 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. 1.6 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. ====== Significance And Use ====== 15.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding methods of Practice E29 . Property Rounded Unit for Observed or Calculated Value Chemical composition, and tolerances (when expressed as decimals) nearest unit in the last right-hand place of figures of the specified limit Tensile strength and yield strength nearest 1000 psi (10 MPa) Elongation nearest 1 %