1.1 本试验方法涵盖锻造和铸造铝制品的双剪切试验，以确定剪切极限强度。 注1: 以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.2 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。 1.3 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====== 5.1 该方法旨在提供一种测量铝合金锻造和铸造产品极限剪切强度的方法。通过该方法获得的数据用于计算可用于设计结构构件（如飞机）的最小特性。人们认识到，由该方法和大多数其他方法确定的荷载条件并不理想，因为它们不严格满足纯剪切的定义。然而，结构中很少存在纯剪切条件。 注2: 该方法与试验方法中描述的方法不可互换 B565 . 通过试验方法获得的抗剪强度 B565 大约10岁 % 低于本试验方法得出的值。 5.2 试样和夹具表面存在润滑剂可能导致剪切强度高达3 % 低于在没有润滑的情况下确定的值（参见 8.1 和试验方法 B565 ).

1.1 This test method covers double-shear testing of wrought and cast aluminum products to determine shear ultimate strengths. Note 1: The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only. 1.2 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. 1.3 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 ====== 5.1 The intent of this method is to provide a means of measuring the ultimate shear strength of aluminum-alloy wrought and cast products. Data obtained by this method are used to calculate minimum properties that can be utilized in the design of structural members such as found in aircraft. It is recognized that loading conditions developed by this method, and by most others, are not ideal in that they do not strictly satisfy the definition of pure shear. However, rarely do pure shear conditions exist in structures. Note 2: This method is not interchangeable with that described in Test Method B565 . Shear strengths obtained by Test Method B565 are about 10 % lower than those developed by this test method. 5.2 The presence of a lubricant on the surface of the specimen and fixture may result in shear strengths up to 3 % lower than those determined in the absence of lubrication (see 8.1 and Test Method B565 ).