1.1 这些试验方法的目的是允许检测表1、表2和表3中列出的某些双相不锈钢中金属间相的存在，以使韧性或耐腐蚀性受到显著影响。这些试验方法不一定能检测出其他原因造成的韧性或耐腐蚀性损失。试验方法中描述了其他双相不锈钢的类似试验方法 1084年 ，但本标准中描述的程序与试验方法A、B和C在 1084年 。 1.2 双相（奥氏体-铁素体）不锈钢在约600至1750的温度范围内暴露时容易形成金属间化合物 °F（320至955 °C）。这些沉淀反应的速度是每个单独部件的组成和热或热机械历史的函数。 这些相的存在对韧性和耐腐蚀性是有害的。 1.3 双相不锈钢的正确热处理可以消除这些有害相。产品的快速冷却为随后的热暴露提供了对有害相形成的最大阻力。 1.4 符合适用产品规范的化学和机械要求并不一定意味着产品中不存在有害相。 1.5 这些测试方法包括以下内容: 1.5.1 试验方法A- 双相不锈钢蚀刻结构分类的氢氧化钠蚀刻试验（截面 3– 7. )。 1.5.2 试验方法B- 双相不锈钢结构分类用夏比冲击试验（截面） 8– 13 )。 1.5.3 试验方法C- 双相不锈钢结构分类用氯化铁腐蚀试验（截面） 14– 20 )。 1.6 只要选择了适当位置和方向的样品，在所有三种测试中都可以很容易地检测到有害金属间相的存在。由于金属间相的出现是温度和冷却速率的函数，因此将测试应用于最有可能促进金属间相形成的材料区域是至关重要的。在普通热处理的情况下，该区域将是冷却最慢的区域。除了快速冷却的材料外，可能需要从被确定为冷却最慢的位置进行取样，以便对待表征的材料块进行表征。 1.7 测试并没有确定有害相的确切性质，而是确定金属间相的存在或不存在对材料的韧性和耐腐蚀性有害。 1.8 热暴露、金属间相的出现以及韧性和耐腐蚀性的退化之间的相关性示例见 附录X1 和 附录X2 。 1.9 以英寸磅或国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.10 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。 1.11 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。

1.1 The purpose of these test methods is to allow detection of the presence of intermetallic phases in certain duplex stainless steels as listed in Table 1, Table 2, and Table 3 to the extent that toughness or corrosion resistance is affected significantly. These test methods will not necessarily detect losses of toughness or corrosion resistance attributable to other causes. Similar test methods for other duplex stainless steels are described in Test Method A1084 , but the procedures described in this standard differ significantly from Test Methods A, B, and C in A1084 . 1.2 Duplex (austenitic-ferritic) stainless steels are susceptible to the formation of intermetallic compounds during exposures in the temperature range from approximately 600 to 1750 °F (320 to 955 °C). The speed of these precipitation reactions is a function of composition and thermal or thermomechanical history of each individual piece. The presence of these phases is detrimental to toughness and corrosion resistance. 1.3 Correct heat treatment of duplex stainless steels can eliminate these detrimental phases. Rapid cooling of the product provides the maximum resistance to formation of detrimental phases by subsequent thermal exposures. 1.4 Compliance with the chemical and mechanical requirements for the applicable product specification does not necessarily indicate the absence of detrimental phases in the product. 1.5 These test methods include the following: 1.5.1 Test Method A— Sodium Hydroxide Etch Test for Classification of Etch Structures of Duplex Stainless Steels (Sections 3 – 7 ). 1.5.2 Test Method B— Charpy Impact Test for Classification of Structures of Duplex Stainless Steels (Sections 8 – 13 ). 1.5.3 Test Method C— Ferric Chloride Corrosion Test for Classification of Structures of Duplex Stainless Steels (Sections 14 – 20 ). 1.6 The presence of detrimental intermetallic phases is readily detected in all three tests, provided that a sample of appropriate location and orientation is selected. Because the occurrence of intermetallic phases is a function of temperature and cooling rate, it is essential that the tests be applied to the region of the material experiencing the conditions most likely to promote the formation of an intermetallic phase. In the case of common heat treatment, this region will be that which cooled most slowly. Except for rapidly cooled material, it may be necessary to sample from a location determined to be the most slowly cooled for the material piece to be characterized. 1.7 The tests do not determine the precise nature of the detrimental phase but rather the presence or absence of an intermetallic phase to the extent that it is detrimental to the toughness and corrosion resistance of the material. 1.8 Examples of the correlation of thermal exposures, the occurrence of intermetallic phases, and the degradation of toughness and corrosion resistance are given in Appendix X1 and Appendix X2 . 1.9 The values stated in either inch-pound or SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.10 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. 1.11 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.