1.1 本试验方法描述了确定锻造铜合金产品中是否存在可能导致应力腐蚀开裂的残余应力的程序。氨蒸汽气氛用作加速试验。 1.2 本试验方法仅适用于由铜合金制成的产品，这些铜合金已知在氨蒸汽环境中容易发生应力腐蚀开裂。其目的是创造一种可再现的严重性环境条件。 注1: 众所周知，开裂机理中的关键步骤是在试样表面的冷凝膜中形成环境，该冷凝膜富含铜络合物离子。 1.3 本试验方法的严重性取决于腐蚀溶液的pH值。在里面 附件A1 根据与预期应用相关的风险水平，给出了产品可能暴露在的四种不同大气中，以及用于测试的溶液的适当pH值。 1.3.1 测试的适当pH值应在产品规范中规定，或根据供应商和买方之间关于合金及其预期应用的既定协议。 1.4 单位- 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。 1.5 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====== 5.1 本试验方法是一种加速试验，用于确定铜合金产品在使用过程中暴露于具有适当风险水平的特定大气条件下时是否容易发生应力腐蚀开裂，见 附件A1 . 5.1.1 本试验方法通常用于确定铜合金产品在接受试验时是否会因内应力而开裂，而不是用于测试施加应力下的组件。如果用于此目的，则其仅供参考，不得作为拒收组件、其零部件或原磨机产品的理由。

1.1 This test method describes a procedure to determine the presence of residual stresses in wrought copper alloy products that may lead to stress corrosion cracking. An ammonia vapor atmosphere is used as an accelerated test. 1.2 This test method is only suitable for products fabricated from copper alloys that are known to be susceptible to stress corrosion cracking in ammonia vapor atmospheres. It is intended to create an environmental condition of reproducible severity. Note 1: It is well known that the critical step in the cracking mechanism is the development of an environment in the condensate film that occurs on the surface of the test specimen, and is rich in copper complex ions. 1.3 The severity of this test method depends upon the pH of the corrosive solution. In Annex A1 are given four different atmospheres to which the product may be exposed, and the appropriate pH of the solution to be used for the test, depending on the risk level associated with the intended application. 1.3.1 The appropriate pH value for the test shall be specified in the product specification, or as per established agreement between the supplier and purchaser, with respect to the alloy and its intended application. 1.4 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 ====== 5.1 This test method is an accelerated test to determine if a copper alloy product will be susceptible to stress-corrosion cracking when exposed to a particular atmospheric condition during service with the appropriate risk level—see Annex A1 . 5.1.1 This test method is generally intended to determine if a copper alloy product will crack because of internal stresses when subjected to the test, and is not intended for testing assemblies under applied stress. If used for this purpose, it shall be for information only and not a cause for rejection of the assembly, its component parts, or the original mill product.