1.1 本规程涵盖了指定（在ASTM规范范围内）按规定的特定铁心损耗最大值制造的扁钢标准等级的程序。本规程适用于磁性软铁和钢（低碳钢和含硅、铝和其他合金元素的铁合金），其中在规定的交流感应峰值和规定的频率（如1.5 T（15 kG）和60 Hz）下测量铁芯损耗，通常用于对材料进行分级。如果材料也满足ASTM规范的所有要求，则当某些其他特性（或不同的感应或频率，或两者）被指定为极限特性时，本规程也适用。 1.2 符合本规范的单个规范为规范 A677型 , A683型 , A726 , A876 和 A1086号 . 1.3 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。 1.4 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、健康和环境实践，并确定监管限制的适用性。 1.5 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 practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical steels made to specified maximum values of specific core loss. This practice applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, and other alloying elements) where a core loss measurement at a stated peak value of alternating induction and a stated frequency, such as 1.5 T (15 kG) and 60 Hz, is normally used to grade the material. This practice also applies when some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided the material also meets all the requirements of the ASTM specification. 1.2 Individual specifications that are in conformity with this practice are Specifications A677 , A683 , A726 , A876 , and A1086 . 1.3 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. 1.4 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. 1.5 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.