1.1 本指南涵盖了解释使用小型单板测试系统确定的特定岩芯损耗和峰值磁导率的程序。它仅限于要求从被测材料上切下试样或试样的单板测试系统，并且其设计应确保在测试过程中该试样的整个宽度都被磁化。 1.2 本指南主要用于在正弦磁通量条件下，以50 Hz或60 Hz的频率测量扁轧电工钢的磁性。 1.3 本指南包括提供与25 cm爱泼斯坦试验方法（试验方法）相关性的程序 A343/A343M ). 1.4 磁通密度的范围由试样、仪器和测试电源的特性决定。无取向电工钢可在高达约16 kG[1.6T]的磁通密度下进行铁心损耗测试。峰值磁导率测试的最大磁场强度受磁化绕组和测试电源的载流能力限制。单板测试仪通常能够在高达50 Oe[4000 A/m]或更高的磁场强度下进行测试。 1.5 在本指南中，小型单板测试仪（小型SST）是指设计用于测试扁平矩形板的磁性测试仪- 类型样本。这些测试仪的典型样本是正方形（或接近正方形）。小型SST测试夹具的设计可能小到足以容纳约5×5 cm的样本，也可能大到足以容纳约36×36 cm的样本。特定SST的试样必须适用于特定的测试夹具。 1.6 本指南涵盖两种替代试验方法:方法1和方法2。 1.6.1 方法1是测试方法1的扩展 A804/A804M ，它描述了一种测试夹具，具有两个环绕试样的绕组和两个低磁阻、低铁心损耗的铁磁轭，用作磁通回流路径。 方法1的测试夹具的尺寸不是固定的，而是可以在中给出的限制内针对任何标称试样尺寸进行设计和制造 1.5 . 这种情况下的功率损耗是通过测量一次电流和感应二次电压乘积的平均值来确定的。 1.6.2 方法2包括使用小型单片测试仪，该测试仪使用磁化绕组、磁通感应绕组和磁场强度检测器。这种情况下的功率损耗是通过测量感应二次电压和磁场强度乘积的平均值来确定的。 1.6.3 本指南附录中描述的校准方法适用于这两种试验方法。 1.7 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，国际单位制显示在括号中。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。 1.8 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。 1.9 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 材料评估- 开发了小型单板测试仪，以补充各种应用中对Epstein样本的测试。当Epstein样品的制备材料不足时，它们特别适用于测定样品的磁性。 虽然小样本尺寸很有吸引力，但预计小薄板测试仪的精度不如测试方法的精度 A343/A343M . 小片测试仪经常用于测量完全加工和半加工的无取向和磁性叠层钢的性能。半加工钢的试样通常在测试之前进行适当的质量发展退火。小片测试仪也可用于评估在剪切或应力消除退火条件下的取向电工钢。

1.1 This guide covers procedures for interpreting the specific core loss and peak permeability determined using small single-sheet test systems. It is limited to single-sheet test systems that require a test specimen or coupon be cut from the material being tested and are designed such that the entire width of that test specimen is magnetized during testing. 1.2 This guide is primarily intended for measurements of the magnetic properties of flat-rolled electrical steels at frequencies of 50 Hz or 60 Hz under sinusoidal flux conditions. 1.3 This guide includes procedures to provide correlation with the 25-cm Epstein test method (Test Method A343/A343M ). 1.4 The range of magnetic flux densities is governed by the properties of the test specimens and the instruments and test power source. Nonoriented electrical steels may be tested at magnetic flux densities up to about 16-kG [1.6T] for core loss. The maximum magnetic field strength for peak permeability testing is limited by the current carrying capacity of the magnetizing winding and the test power source. Single sheet testers are typically capable of testing at magnetic field strengths up to 50 Oe [4000 A/m] or more. 1.5 Within this guide, a small single sheet tester (small SST) is defined as a magnetic tester designed to test flat, rectangular sheet-type specimens. Typical specimens for these testers are square (or nearly so). The design of the small SST test fixture may be small enough to accommodate specimens about 5 by 5 cm or may be large enough to accommodate specimens about 36 by 36 cm. Specimens for a particular SST must be appropriate for the particular test fixture. 1.6 This guide covers two alternative test methods: Method 1 and Method 2. 1.6.1 Method 1 is an extension of Method 1 of Test Method A804/A804M , which describes a test fixture having two windings that encircle the test specimen and two low-reluctance, low-core loss ferromagnetic yokes that serve as flux return paths. The dimensions of the test fixture for Method 1 are not fixed but rather may be designed and built for any nominal specimen dimension within the limits given in 1.5 . The power loss in this case is determined by measuring the average value of the product of primary current and induced secondary voltage. 1.6.2 Method 2 covers the use of a small single sheet tester, which employs a magnetizing winding, a magnetic flux sensing winding, and a magnetic field strength detector. The power loss in this case is determined by measuring the average value of the product of induced secondary voltage and magnetic field strength. 1.6.3 The calibration method described in the annex of this guide applies to both test methods. 1.7 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. 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. 1.8 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. 1.9 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 Materials Evaluation— Small single sheet testers were developed to supplement the testing of Epstein specimens for various applications. They are especially appropriate for determining the magnetic properties of samples when insufficient material is available for preparation of an Epstein specimen. Although the small specimen size is attractive, the precision of the small sheet testers is not expected to be as good as that of the test method Test Method A343/A343M . Small sheet testers are frequently used to measure the properties of both fully processed and semiprocessed nonoriented and magnetic lamination steels. Specimens of semiprocessed steels are normally subjected to an appropriate quality development anneal prior to testing. Small sheet testers may also be used to evaluate oriented electrical steels in either the as sheared or stress-relief annealed condition.