1.1 本试验方法涵盖了使用电磁（涡流）法测定非磁性材料（通常为非磁性金属）电导率的程序。该程序主要用于商用直读电导率仪。通用涡流仪器也可用于电导率测量，但本试验方法中不涉及。 1.2 本试验方法适用于表面平坦或略微弯曲的非磁性材料，包括具有或不具有薄非导电涂层的金属。 1.3 电导率的涡流测定可用于非磁性材料的分类，涉及到诸如合金类型、老化、冷变形、热处理、与不均匀加热或过热相关的影响以及腐蚀的影响等变量。检查这些特性的有用性取决于特定变量变化引起的电导率变化量。 1.4 当用涡流仪器进行评估时，电导率通常表示为国际退火铜标准电导率的百分比（% IACS）或西门子/米（S/m）。退火铜标准的电导率定义为0.58  × 10 8. S/m（100 % IACS）在20 °C。 1.5 以国际单位制表示的数值被视为标准。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 当与已知值的参考标准结合使用时，绝对探针线圈法提供了一种确定非磁性材料导电性的方法。 4.2 当与列出的另一种方法结合使用并与参考图表进行比较时，试样的电导率可作为 确定:( 1. ) 金属或合金的类型( 2. )热处理类型（对于铝，该评估应与硬度检查结合使用）( 3. )合金的老化( 4. )腐蚀的影响( 5. )热损伤( 6. )脾气，以及( 7. )硬度。

1.1 This test method covers a procedure for determining the electrical conductivity of nonmagnetic materials, typically nonmagnetic metals, using the electromagnetic (eddy current) method. The procedure has been written primarily for use with commercially available direct reading electrical conductivity instruments. General purpose eddy current instruments may also be used for electrical conductivity measurements but will not be addressed in this test method. 1.2 This test method is applicable to nonmagnetic materials that have either a flat or slightly curved surface and includes metals with or without a thin nonconductive coating. 1.3 Eddy current determinations of electrical conductivity may be used in the sorting of nonmagnetic materials with respect to variables such as type of alloy, aging, cold deformation, heat treatment, effects associated with non-uniform heating or overheating, and effects of corrosion. The usefulness of the examinations of these properties is dependent on the amount of electrical conductivity change caused by a change in the specific variable. 1.4 Electrical conductivity, when evaluated with eddy current instruments, is usually expressed as a percentage of the conductivity of the International Annealed Copper Standard (% IACS) or Siemens/meter (S/m). The conductivity of the Annealed Copper Standard is defined to be 0.58  × 10 8 S/m (100 % IACS) at 20 °C. 1.5 The values stated in SI units are regarded as standard. 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 Absolute probe coil methods, when used in conjunction with reference standards of known value, provide a means for determining the electrical conductivity of nonmagnetic materials. 4.2 Electrical conductivity of a specimen, when used in conjunction with another method listed and compared to reference charts, can be used as a means of  determining: ( 1 ) type of metal or alloy, ( 2 ) type of heat treatment (for aluminum this evaluation should be used in conjunction with a hardness examination), ( 3 ) aging of the alloy, ( 4 ) effects of corrosion, ( 5 ) heat damage, ( 6 ) temper, and ( 7 ) hardness.