1.1 本试验方法包括通过在受控条件下均匀增加横向力来测定烧结（包括后处理）粉末冶金试样的横向断裂强度。本文中使用的术语“横向断裂强度”定义了根据弯曲公式计算的应力，该公式将试样断裂为端部附近支撑的简支梁，并在支架固定线中心之间施加力。 1.2 限制- 横向断裂试验仅适用于相对脆性材料。如果正在测试韧性试样，且测试结果的永久挠度超过0.02英寸。（0.5 mm），测试结果可能有问题。 1.3 试验方法 B406页 应咨询以确定硬质合金的横向断裂强度。 1.4 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 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====== 4.1 本试验方法用于测量烧结试样（包括后处理试样）的强度。横向断裂强度不是设计值。对于许多烧结材料，横向断裂强度约为极限抗拉强度的两倍。

1.1 This test method covers determination of the transverse rupture strength of sintered, including post-treated, powder metallurgy test specimens by subjecting them to a uniformly increasing transverse force under controlled conditions. The term “transverse rupture strength” as used herein, defines the stress, calculated from the flexure formula required to break a specimen as a simple beam supported near the ends and applying the force midway between the fixed line center of the supports. 1.2 Limitations— The transverse rupture test is only applicable to relatively brittle materials. In cases where a ductile specimen is being tested and the permanent deflection as a result of testing exceeds 0.02 in. (0.5 mm), the test results may be questionable. 1.3 Test Method B406 should be consulted for determining the transverse rupture strength of cemented carbides. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 ====== 4.1 This test method is used to measure the strength of sintered, including post-treated, specimens. Transverse rupture strength is not a design value. For many sintered materials, transverse rupture strength is approximately twice the ultimate tensile strength.