1.1 这些试验方法涵盖了测定渗透率[相对渗透率]的四个程序 2. 相对渗透率不超过6.0的材料。 1.2 试验方法如下: 1.2.1 试验方法1- 通量法 适用于相对渗透率在1.0和4.0之间的材料。该方法允许用户选择要测量磁导率的磁场强度。 1.2.2 试验方法2- 顺磁性材料的磁导率 已被取消为可接受的测试方法。 1.2.3 试验方法3- 低磁导率指示器 适用于测量材料的渗透率，其“小于”或“大于”校准标准插入物的渗透率，相对渗透率在1.01和6.0之间，指定用于低- Mu渗透性指示器。 3. 在这种方法中，小体积的试样受到局部磁场的影响，该磁场在大小和方向上都会发生变化，因此不可能指定进行测量时的磁场强度。 1.2.4 试验方法4- 磁通畸变 适用于相对渗透率在1.0和2.0之间的材料。在这种方法中，小体积的试样受到局部磁场的影响，该磁场在大小和方向上都会发生变化，因此不可能指定进行测量时的磁场强度。 4. 1.2.5 试验方法5- 振动样品磁强计 适用于相对渗透率在1.0和4.0之间的材料。该测试方法允许用户选择要测量磁导率的磁场强度。 1.3 通常通过这些方法测试的材料，如奥氏体不锈钢，可能具有弱铁磁性。也就是说，磁导率取决于磁场强度。因此，使用不同方法获得的结果可能并不完全一致。当使用方法1和5时，必须指定已确定磁导率的磁场强度或磁场强度范围。 1.4 以惯用（cgs emu和英寸磅）或国际单位制表示的值和方程应单独视为标准。在本标准中，括号中显示了国际单位制，但与计算有关的章节除外，其中各单位制有单独的章节。每个系统中规定的值可能不是精确的等效值； 因此，每个系统应相互独立使用。合并两个系统的值可能会导致不符合本标准。 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、健康和环境实践，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。 ====意义和用途====== 3.1 该测试方法适用于规范验收、设计目的、服务评估、法规、制造控制和研发。 3.2 由于试样形状和尺寸的限制，该试验方法最常用于在零件制造前评估半成品。

1.1 These test methods cover four procedures for determination of the permeability [relative permeability] 2 of materials having a relative permeability not exceeding 6.0. 1.2 The test methods covered are as follows: 1.2.1 Test Method 1— Fluxmetric Method is suitable for materials with relative permeabilities between 1.0 and 4.0. This method permits the user to select the magnetic field strength at which the permeability is to be measured. 1.2.2 Test Method 2— Permeability of Paramagnetic Materials has been eliminated as an acceptable method of test. 1.2.3 Test Method 3— Low Mu Permeability Indicator is suitable for measuring the permeability of a material as “less than” or “greater than” that of calibrated standard inserts with relative permeabilities between 1.01 and 6.0, as designated for use in a Low-Mu Permeability Indicator. 3 In this method, a small volume of specimen is subjected to a local magnetic field that varies in magnitude and direction, so it is not possible to specify the magnetic field strength at which the measurement is made. 1.2.4 Test Method 4— Flux Distortion is suitable for materials with relative permeabilities between 1.0 and 2.0. In this method, a small volume of specimen is subjected to a local magnetic field that varies in magnitude and direction, so it is not possible to specify the magnetic field strength at which the measurement is made. 4 1.2.5 Test Method 5— Vibrating Sample Magnetometry is suitable for materials with relative permeabilities between 1.0 and 4.0. This test method permits the user to select the magnetic field strength at which the permeability is to be measured. 1.3 Materials typically tested by these methods such as austenitic stainless steels may be weakly ferromagnetic. That is, the magnetic permeability is dependent on the magnetic field strength. As a consequence, the results obtained using the different methods may not closely agree with each other. When using Methods 1 and 5, it is imperative to specify the magnetic field strength or range of magnetic field strengths at which the permeabilities have been determined. 1.4 The values and equations stated in customary (cgs-emu and inch-pound) or SI units are to be regarded separately as standard. Within this standard, SI units are shown in brackets except for the sections concerning calculations where there are separate sections for the respective unit systems. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this 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, health, and environmental 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. ====== Significance And Use ====== 3.1 This test method is suitable for specification acceptance, design purposes, service evaluation, regulatory statutes, manufacturing control, and research and development. 3.2 Because of the restrictions on the specimen shape and size, this test method is most often used to evaluate semifinished product before fabrication of parts.