1.1 该试验方法称为低应力延伸率（LSE）试验，涵盖了根据施加拉应力产生的永久延伸率来确定裸软方形和矩形铜铝线刚度的程序。 1.2 试样质量的SI值被视为标准。对于所有其他属性，英寸-磅值应视为标准值，国际单位制可以是近似值。 1.3 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 本试验方法设计用于检查或验收新的裸软方形和矩形导线，用于随后制造成磁铁导线。 注1: 由于施加的单位应力和施加时间对于所有尺寸的导线都是恒定的，因此该试验能够根据施加低单位应力产生的永久伸长率，比较相同或不同尺寸导线之间的刚度。

1.1 This test method, known as the low-stress elongation (LSE) test, covers the procedure for determining the stiffness of bare soft square and rectangular copper and aluminum wire in terms of the permanent elongation resulting from the application of a tensile stress. 1.2 The SI values for the mass of the specimen are regarded as the standard. For all other properties, the inch-pound values are to be regarded as standard and the SI units may be approximate. 1.3 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 designed as an inspection or acceptance test of new bare soft square and rectangular wire intended for subsequent fabrication into magnet wire. Note 1: Since the applied unit stress and the time of application are constant for all wire sizes, the test enables comparisons of stiffness to be made between wires of the same or different size on the basis of the permanent elongation resulting from the application of a low unit stress.