1.1 本试验方法涵盖了高温下垫片材料抗压强度特性（抗压挤压性）的测定。 1.2 以国际单位制表示的值应被视为标准。括号中的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 4.1 垫片材料的抗压强度或抗挤压性是选择特定密封应用中使用的给定材料的主要因素。该测试方法的重要性部分基于这样一个假设，即材料一旦被压碎或挤压，将不再像密封件那样有效。然而，这一假设只能作为指导，因为垫片材料（通常具有粘弹性）的确切屈服点或失效点很难确定。可以比较两种或多种材料，以确定其抗压应力的差异。出于质量保证目的，可以将材料样品与既定标准或先前确定的同一材料原始批次的特征进行比较。请参阅 6.2 用于讨论试样面积和几何效应。

1.1 This test method covers the determination of compressive strength characteristics (crush-extrusion resistance) of gasket materials at elevated temperature. 1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.3 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. 1.4 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 compressive strength or crush-extrusion resistance of a gasket material is a major factor with regard to the selection of a given material for use in a particular sealing application. The significance of the test method is based, in part, on the assumption that a material, once it has been crushed or extruded, will no longer function as effectively as a seal. This assumption can only be used as a guide, however, since exact yield or failure points are difficult to define for gasket materials (which are usually viscoelastic in nature). Two or more materials can be compared to determine differences in their resistance to compressive stress. A sample of material can be compared to an established standard or previously determined characteristics on original lots of the same material, for quality assurance purposes. See 6.2 for discussion of specimen area and geometry effects.