1.1 本规程涵盖了在应力腐蚀开裂（SCC）环境中评估焊件的试样制作和使用程序。 1.2 试样描述如下( 一 )仅通过焊接过程产生应力( b )除了由焊接引起的应力之外，还由外部施加的载荷产生应力，以及( c )只有通过退火去除残余焊接应力的情况下，才由外部施加的载荷产生应力。 1.3 本规程仅涉及焊接试样，不涉及应力腐蚀试验的环境方面。其他ASTM标准中讨论了试样弯曲和加载的具体实践，以及C形环、U形弯头、弯曲梁和拉伸试样制备过程中涉及的应力考虑因素。 1.4 从焊件上去除的试样中的实际应力并不精确，因为它取决于焊接操作产生的残余应力水平以及施加的应力。试验方法中描述了一种确定残余应力大小和方向的方法，该方法可能适用于焊件 E837 测试结果的再现性在很大程度上取决于焊件的制备、测试试样的类型和所使用的评估标准。应采用充分的复制来确定与测试程序目标一致的特定测试结果的固有可变性水平。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 （有关更具体的安全隐患信息，请参阅第节 7. .) 1.6 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 本规程旨在说明标准焊接试样和焊接程序，以评估腐蚀环境中焊件的SCC特性。本规程不推荐用户根据调查意图选择的特定腐蚀介质。具体腐蚀性介质包括在实践中 G35 , G36 , G37 和 G44 。可以根据需要使用其他环境。

1.1 This practice covers procedures for the making and utilization of test specimens for the evaluation of weldments in stress-corrosion cracking (SCC) environments. 1.2 Test specimens are described in which ( a ) stresses are developed by the welding process only, ( b ) stresses are developed by an externally applied load in addition to the stresses due to welding, and ( c ) stresses are developed by an externally applied load only with residual welding stresses removed by annealing. 1.3 This practice is concerned only with the welded test specimen and not with the environmental aspects of stress-corrosion testing. Specific practices for the bending and loading of test specimens, as well as the stress considerations involved in preparation of C-rings, U-bend, bent-beam, and tension specimens are discussed in other ASTM standards. 1.4 The actual stress in test specimens removed from weldments is not precisely known because it depends upon the level of residual stress from the welding operation combined with the applied stress. A method for determining the magnitude and direction of residual stress which may be applicable to weldment is described in Test Method E837 . The reproducibility of test results is highly dependent on the preparation of the weldment, the type of test specimen tested, and the evaluation criteria used. Sufficient replication should be employed to determine the level of inherent variability in the specific test results that is consistent with the objectives of the test program. 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. (For more specific safety hazards information, see Section 7 .) 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 intent of this practice is to indicate standard welded specimens and welding procedures for evaluating the SCC characteristics of weldments in corrosive environments. The practice does not recommend the specific corrosive media that may be selected by the user depending upon the intent of his investigation. Specific corrosive media are included in Practices G35 , G36 , G37 , and G44 . Other environments can be used as required.