1.1 这些试验方法包括在高温下测定金属材料抗拉强度、屈服强度、伸长率和断面收缩率的程序和设备。 1.2 不包括弹性模量和比例极限的测定。 1.3 不包括快速加热或快速应变率条件下的拉伸试验。 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 高温拉伸试验对金属承受施加张力的能力提供了有用的估计。利用已建立的和传统的关系，它可以用来指示在其他简单应力状态下的可能行为，如压缩、剪切等。延性值提供了不同材料局部变形而不开裂的能力的比较测量，从而适应局部应力集中或过应力； 然而，拉伸延性与高温应力集中效应之间的定量关系并非普遍有效。在简单应力状态下，拉伸延性和应变控制的低周疲劳寿命之间存在类似的比较关系。这些拉伸试验的结果只能被视为对使用时间长达数小时的强度和延展性的一个有问题的比较测量。因此，当化学成分和微观结构等其他测量也表明两种材料相似时，高温拉伸试验的主要用途是确保被测材料与参考材料相似。

1.1 These test methods cover procedure and equipment for the determination of tensile strength, yield strength, elongation, and reduction of area of metallic materials at elevated temperatures. 1.2 Determination of modulus of elasticity and proportional limit are not included. 1.3 Tension tests under conditions of rapid heating or rapid strain rates are not included. 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 The elevated-temperature tension test gives a useful estimate of the ability of metals to withstand the application of applied tensile forces. Using established and conventional relationships it can be used to give some indication of probable behavior under other simple states of stress, such as compression, shear, etc. The ductility values give a comparative measure of the capacity of different materials to deform locally without cracking and thus to accommodate a local stress concentration or overstress; however, quantitative relationships between tensile ductility and the effect of stress concentrations at elevated temperature are not universally valid. A similar comparative relationship exists between tensile ductility and strain-controlled, low-cycle fatigue life under simple states of stress. The results of these tension tests can be considered as only a questionable comparative measure of the strength and ductility for service times of many hours. Therefore, the principal usefulness of the elevated-temperature tension test is to assure that the tested material is similar to reference material when other measures such as chemical composition and microstructure also show the two materials are similar.