1.1 本试验方法适用于在加热至模量小于6.0 MPa时软化的高模量材料。本试验方法描述了6.65 MPa（方法A）或33.3 MPa（方法B）（相当于试验方法）比模量的温度测定 D1525 )在加热试样时，使用热机械分析仪通过压痕测量来实现试样的硬度。该温度被确定为压痕软化温度。可在环境温度至300°C的温度范围内进行试验。 注1: 本试验方法旨在提供与试验方法类似的结果 D1525 但在热机械分析仪上使用较小直径的压痕探头进行。结果与通过试验方法获得的结果的等效性 D1525 已经在有限数量的材料上进行了演示。在用户证明等效性之前，本试验方法的结果应被视为独立的，与试验方法的结果无关 D1525 . 1.2 不建议将本试验方法用于乙基纤维素、聚氯乙烯、聚偏二氯乙烯和其他具有较大测量不精确性的材料（见试验方法 D1525 和 5.3 和截面 14 ). 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 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。 1.5 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 通过本试验方法获得的数据不得用于预测材料在高温下的行为，除非在时间、温度、加载方法和应力条件与试验中规定的条件类似的应用中。 5.2 该测试方法特别适用于质量控制和开发工作。这些数据不用于设计或预测高温下的耐久性。 5.3 耐用性测试表明，一些材料，如聚氯乙烯，表现出比第节中描述的更大的不精确性 14 对于“性能良好”的材料。

1.1 This test method is applicable to high modulus materials that soften upon heating to a modulus less than 6.0 MPa. This test method describes the determination of the temperature at which the specific modulus of either 6.65 MPa (Method A) or 33.3 MPa (Method B) (equivalent to Test Method D1525 ) of a test specimen is realized by indentation measurement using a thermomechanical analyzer as the test specimen is heated. This temperature is identified as the indentation softening temperature. The test may be performed over the temperature range of ambient to 300 °C. Note 1: This test method is intended to provide results similar to those of Test Method D1525 but is performed on a thermomechanical analyzer using a smaller diameter indenting probe. Equivalence of results to those obtained by Test Method D1525 has been demonstrated on a limited number of materials. Until the user demonstrates equivalence, the results of this Test Method shall be considered to be independent and unrelated to those of Test Method D1525 . 1.2 This test method is not recommended for ethyl cellulose, poly (vinyl chloride), poly (vinylidene chloride) and other materials having a large measurement imprecision (see Test Method D1525 and 5.3 and Section 14 ). 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. 1.5 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 Data obtained by this test method shall not be used to predict the behavior of materials at elevated temperatures except in applications in which the conditions of time, temperature, method of loading, and stress are similar to those specified in the test. 5.2 This test method is particularly suited for quality control and development work. The data are not intended for use in design or predicting endurance at elevated temperatures. 5.3 Ruggedness testing indicates that some materials, such as poly (vinyl chloride) exhibit substantially greater imprecision than that described in Section 14 for “well behaved” materials.