1.1 本规范涵盖了技术上重要的、商用的、硬磁烧结（全密度）永磁体，通常称为钐钴。这些材料有两种通用成分系列，缩写为“SmCo 1:5”和“SmCo 2:17”这些数字表示钐与其他成分之和的近似原子比。（参见 附录X3 更多成分信息。） 1.2 钐钴磁体具有近似于剩余磁感应强度B的磁性 r ，从0.78 T（7800 G）到1.18 T（11 800 G），内禀矫顽力，H cJ公司 ，通常大于800 kA/m（10000 Oe）。特殊等级和各向同性（未对准）磁体的性能可能超出这些范围（请参见 附录X4 ). 具体磁滞行为（退磁曲线）可以使用测试方法表征 A977/A977M . 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 specification covers technically important, commercially available, magnetically hard sintered (fully dense) permanent magnets commonly known as samarium cobalt. These materials are available in two general composition families abbreviated “SmCo 1:5” and “SmCo 2:17.” The numbers indicate the approximate atomic ratio of samarium to the sum of other constituents. (Refer to Appendix X3 for additional composition information.) 1.2 Samarium cobalt magnets have approximate magnetic properties of residual magnetic induction, B r , from 0.78 T (7800 G) to 1.18 T (11 800 G) and intrinsic coercivity, H cJ , typically greater than 800 kA/m (10 000 Oe). Special grades and isotropic (un-aligned) magnets can have properties outside these ranges (see Appendix X4 ). Specific magnetic hysteresis behavior (demagnetization curve) can be characterized using Test Method A977/A977M . 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.