1.1 本规范涵盖电子应用用镀银圆形铜包钢线。 1.2 银涂层在涂层导线总质量中的质量百分比如下:1.25、2.5、4.0、6.1和8.0。 1.2.1 根据制造商和买方之间的相互协议，可以获得具有不同最小银质量百分比的镀银导线。出于信息目的，涂层厚度以微英寸为单位，由中列出的质量百分比提供 1.2 如所示 表1 . 1.3 铜包钢线分为四类: 30HS级标称30 % 电导率硬拉，30A级标称30 % 电导率退火，40HS级标称40 % 电导率硬拉，40A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值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4.1 例外情况- 电阻率应以国际单位制为标准 1.5 以下安全危险警告与本规范中描述的试验方法有关。 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和健康实践，并确定监管限制的适用性。( 小心 -选择溶剂清洗剂时，应考虑毒性和易燃性。 )

1.1 This specification covers silver-coated, round, copper-clad steel wire for electronic application. 1.2 Silver coatings in mass percentages of the total mass of the coated wire are as follows: 1.25, 2.5, 4.0, 6.1, and 8.0. 1.2.1 Silver-coated wire having different minimum percentage of silver by mass may be obtained by mutual agreement between the manufacturer and the purchaser. For information purposes, the thickness of coating in microinches provided by the mass percentages listed in 1.2 is shown in Table 1 . 1.3 Four classes of copper-clad steel wire are covered as follows: Class 30HS nominal 30 % conductivity hard-drawn, Class 30A nominal 30 % conductivity annealed, Class 40HS nominal 40 % conductivity hard-drawn, and Class 40A 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— In resistivity the SI units are to be regarded as the standard 1.5 The following safety hazards caveat pertains to the test method described in this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ( Caution —Consideration should be given to toxicity and flammability when selecting solvent cleaners. )