1.1 本规范涵盖了采用粉末冶金技术制造的50个镍铁零件的磁性，适用于需要高磁导率、高电阻率、低矫顽场强和低磁滞损耗的零件。它不同于锻造合金规范（参见规范 A753型 )因为这些部分是多孔的。磁导率等许多磁性与烧结密度成正比。 1.2 本规范涉及烧结或退火条件下的粉末冶金零件。如果烧结零件经受任何导致机械应变的二次操作，如机加工或尺寸调整，则应重新定心或退火。 1.3 以国际单位制表示的数值应视为标准值。 括号中给出的值是到常用（cgs emu和英寸磅）单位的数学转换，仅供参考，不被视为标准。 1.3.1 有两个单位表示的选定值，均采用可接受的国际单位制。这些由单词“or”区分，如“μΩ-cm，or，Ω-m” 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 the magnetic properties of 50 nickel-50 iron parts fabricated by powder metallurgy techniques and is intended for parts that require high magnetic permeability, high electrical resistivity, low coercive field strength, and low hysteresis loss. It differs from the wrought alloy specification (see Specification A753 ) because these parts are porous. A number of magnetic properties such as permeability are proportional to the sintered density. 1.2 This specification deals with powder metallurgy parts in the sintered or annealed condition. Should the sintered parts be subjected to any secondary operation that causes mechanical strain, such as machining or sizing, they should be resintered or annealed. 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. 1.3.1 There are selected values presented in two units, both of which are in acceptable SI units. These are differentiated by the word “or,” as in “μΩ-cm, or, Ω-m.” 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.