1.1 本规程规定了用于检测铁磁性材料表面或轻微亚表面不连续性的磁粉检测的最低要求。本规程适用于使用湿荧光法的航空航天应用。参考实践 E3024/E3024M 用于工业应用。指导 E709 可以作为教程与本实践结合使用。 注1: 本规程取代MIL-STD-1949。 1.2 磁粉检测方法用于检测铁磁性材料表面或附近的裂纹、搭接、接缝、夹杂物和其他不连续性。 磁粉检测可应用于原材料、坯料、成品和半成品材料、焊缝和在役零件。磁粉检测不适用于非铁磁性金属和合金，如奥氏体不锈钢。看见 附录X1 了解更多信息。 1.3 便携式电池供电电磁轭不在本规程范围内。 1.4 本实践的所有领域均可由认可的工程组织和供应商达成协议，或由认可的工程组织提供具体指导。 1.5 本标准是一种组合标准，是一种ASTM标准，在该标准中，合理的国际单位制和英寸磅单位包括在同一标准中，每个单位系统单独视为标准。 1.5.1 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.6 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。 1.7 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。 ====意义和用途====== 4.1 过程描述- 磁粉检测包括磁化待检查区域，在该区域磁化时应用适当制备的磁粉，然后解释和评估任何由此产生的颗粒堆积。当不连续性位于表面并垂直于磁通量时，出现最大可检测性。 4.2 本规程确定了控制磁粉检测方法应用的基本参数。 本规程的编写是为了在工程图纸、规范或合同中规定。它不是供检查人员使用的详细操作程序，因此必须由符合本规程要求的详细书面程序进行补充。

1.1 This practice establishes minimum requirements for magnetic particle testing used for the detection of surface or slightly subsurface discontinuities in ferromagnetic material. This practice is intended for aerospace applications using the wet fluorescent method. Refer to Practice E3024/E3024M for industrial applications. Guide E709 can be used in conjunction with this practice as a tutorial. Note 1: This practice replaces MIL-STD-1949. 1.2 The magnetic particle testing method is used to detect cracks, laps, seams, inclusions, and other discontinuities on or near the surface of ferromagnetic materials. Magnetic particle testing may be applied to raw material, billets, finished and semi-finished materials, welds, and in-service parts. Magnetic particle testing is not applicable to non-ferromagnetic metals and alloys such as austenitic stainless steels. See Appendix X1 for additional information. 1.3 Portable battery powered electromagnetic yokes are outside the scope of this practice. 1.4 All areas of this practice may be open to agreement between the cognizant engineering organization and the supplier, or specific direction from the cognizant engineering organization. 1.5 This standard is a combined standard, an ASTM standard in which rationalized SI units and inch-pound units are included in the same standard, with each system of units to be regarded separately as standard. 1.5.1 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.6 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. 1.7 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. ====== Significance And Use ====== 4.1 Description of Process— Magnetic particle testing consists of magnetizing the area to be examined, applying suitably prepared magnetic particles while the area is magnetized, and subsequently interpreting and evaluating any resulting particle accumulations. Maximum detectability occurs when the discontinuity is positioned on the surface and perpendicular to the magnetic flux. 4.2 This practice establishes the basic parameters for controlling the application of the magnetic particle testing method. This practice is written so that it can be specified on the engineering drawing, specification, or contract. It is not a detailed how-to procedure to be used by the examination personnel and, therefore, must be supplemented by a detailed written procedure that conforms to the requirements of this practice.