1.1 本规范涵盖电子应用用镀镍圆形铜包钢丝。 1.2 镍涂层占涂层金属丝总质量的质量百分比如下:2 %, 4. %, 7. %, 10 %, 和27 %. 具有不同最小镍质量百分比的镀镍线可通过制造商和买方之间的相互协议获得。为了提供信息，上述百分比提供的涂层厚度（单位:微英寸）如表所示 表1 。 1.3 四类镀镍铜包钢丝包括如下: 1.3.1 N30HS级-- 标称30 % 导电性，硬拉。 1.3.2 N30A级-- 标称30 % 导电性，退火。 1.3.3 N40HS级-- 标称40 % 导电性，硬拉。 1.3.4 N40A级-- 标称40 % 导电性，退火。 1.4 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4.1 例外-- 电阻率的SI值应视为标准值。 1.5 以下安全隐患警告仅适用于本规范中描述的测试方法。 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。 ( 警告-- 选择溶剂清洁剂时应考虑毒性和易燃性。） 1.6 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 nickel-coated, round, copper-clad steel wire for electronic application. 1.2 Nickel coatings in mass percentages of the total mass of the coated wire are as follows: 2 %, 4 %, 7 %, 10 %, and 27 %. Nickel-coated wire having different minimum mass percentages of nickel may be obtained by mutual agreement between the manufacturer and the purchaser. For information purposes, the thickness of coating in microinches provided by the percentages listed above is shown in Table 1 . 1.3 Four classes of nickel-coated, copper-clad steel wire are covered as follows: 1.3.1 Class N30HS— Nominal 30 % conductivity, hard drawn. 1.3.2 Class N30A— Nominal 30 % conductivity, annealed. 1.3.3 Class N40HS— Nominal 40 % conductivity, hard drawn. 1.3.4 Class N40A— Nominal 40 % conductivity, annealed. 1.4 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. 1.4.1 Exception— The SI values for resistivity are to be regarded as standard. 1.5 The following safety hazards caveat pertains only to the test method described in 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. ( Warning— Consideration should be given to toxicity and flammability when selecting solvent cleaners.) 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.