1.1 本规范涵盖电气用裸硬拉圆铜包钢丝（ 附注1 ). 附注1: 按照本规范订购的导线不用于重拉。如果为此需要电线，请咨询制造商。 1.2 规定了四个等级的电线，指定如下（ 附注2 ）:40 HS级、40 EHS级、30 HS级和30 EHS级。 附注2: 本规范涵盖的等级对应于以下商业名称: 40级HS ，高强度，40%电导率。 40级EHS 、超高强度、40%电导率 30级HS ，高强度，30%电导率。 30级EHS ，超高强度，30%电导率。 1.3 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。1.4 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》中确立的国际公认的标准化原则制定的。

1.1 This specification covers bare hard-drawn round copper-clad steel wire for electrical purposes ( Note 1 ). Note 1: Wire ordered to this specification is not intended for redrawing. If wire is desired for this purpose, consult the manufacturer. 1.2 Four grades of wire are specified, designated as follows ( Note 2 ): Grade 40 HS, Grade 40 EHS, Grade 30 HS, and Grade 30 EHS. Note 2: The grades covered by this specification correspond to the following commercial designations: Grade 40 HS , High Strength, 40 % Conductivity. Grade 40 EHS , Extra High Strength, 40 % Conductivity Grade 30 HS , High Strength, 30 % Conductivity. Grade 30 EHS , Extra High Strength, 30 % Conductivity. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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.