1.1 本规范涵盖电气用1350–H19（超硬）铝圆线。 1.2 以英寸-磅或国际单位表示的数值应单独视为标准值。每个系统中的值并不完全相等；因此，每个系统应独立于其他系统使用。组合两个系统的值可能会导致不符合规范。 1.2.1 对于密度、电阻率和温度，以SI单位表示的值应视为标准值。 注1: 1975年之前，1350铝被指定为EC铝。 注2: 铝和回火名称符合ANSI H35.1/H35.1M。根据惯例，铝1350符合UNS A91350 E527（电子527） . 注3: 有关本规范中与非绝缘电导体相关的术语定义，请参见术语 B354号 . 1.3 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。

1.1 This specification covers aluminum 1350–H19 (extra hard) round wire for electrical purposes. 1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. 1.2.1 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard. Note 1: Prior to 1975 aluminum 1350 was designated EC aluminum. Note 2: The aluminum and temper designations conform to ANSI H35.1/H35.1M. Aluminum 1350 corresponds to UNS A91350 in accordance with Practice E527 . Note 3: For definitions of terms found in this specification relating to uninsulated electrical conductors see Terminology B354 . 1.3 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.