1.1 本规范涵盖了扁钢、晶粒取向、全加工电工钢的规定等级应符合的详细要求。这些钢主要用于在商业功率频率（50和60 Hz）下以中等至高磁通密度运行的变压器铁芯。 1.2 这些晶粒取向电工钢是硅含量约为3.2的低碳硅铁合金 % 通过适当的冶金处理，实现了低铁心损耗和轧制方向的高磁导率。 1.3 本规范中描述的电工钢牌号包括( 1. )按照试验方法在1.5 T（15 kG）下测试的常规晶粒取向电工钢 A343/A343M , ( 2. )根据试验方法，在1.7 T（17 kG）下对常规晶粒取向电工钢进行试验 A343/A343M , ( 3. )高渗透晶粒取向电工钢在1。 7 T（17 kG），符合试验方法 A343/A343M ，和( 4. )根据试验方法在1.7 T（17 kG）下进行的激光划片高渗透晶粒取向电工钢试验 A804/A804M . 1.4 以国际单位制表示的数值应视为标准值。括号中给出的数值是到常用（cgs-emu和inch-pound）单位的数学转换，仅供参考，不被视为标准。 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和健康实践，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。

1.1 This specification covers the detailed requirements to which the specified grades of flat-rolled, grain-oriented, fully processed electrical steels shall conform. These steels are used primarily in transformer cores operating at moderate to high magnetic flux densities at commercial power frequencies (50 and 60 Hz). 1.2 These grain-oriented electrical steels are low-carbon, silicon-iron alloys with a silicon content of approximately 3.2 % in which low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing. 1.3 The electrical-steel grades described in this specification include ( 1 ) conventional grain-oriented electrical steel tested at 1.5 T (15 kG) in accordance with Test Method A343/A343M , ( 2 ) conventional grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Method A343/A343M , ( 3 ) high-permeability grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Method A343/A343M , and ( 4 ) laser-scribed high-permeability grain-oriented electrical steel tested at 1.7 T (17 kG) in accordance with Test Methods A804/A804M . 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which are provided for information only and are not considered standard. 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 and health 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.