1.1 目的- 本规程规定了锻制品超声波检查的最低要求。 注1: 1982年9月30日，采用该做法取代MIL-STD-2154。本规程旨在用于与其替换的文件相同的应用。用户在考虑将其用于新的或不同的应用程序或两者时，应仔细审查其要求。 1.2 应用程序- 本规程适用于厚度或横截面等于0.250 in.（6.35 mm）或更大的锻造金属和锻造金属制品等材料的检验。 1.2.1 锻造铝合金产品- 考试应符合惯例 94美元 变形铝合金产品的角束扫描应按照买方和供应商商定的本规程进行。 1.3 验收等级- 按照本规程进行检查时，工程图纸、规范或其他适用文件应注明验收标准。 中定义了五种超声波验收等级 表1 这些类别中的一个或多个可用于确定验收标准，或可指定其他或替代标准。 1.4 优先顺序- 合同要求和认可工程组织的授权指示可增加或修改本规程的要求。否则，如果本规程文本与本文引用的参考文献之间存在冲突，则以本规程文本为准。然而，除非获得特定豁免，否则本规范中的任何内容均不得取代适用的法律法规。 1.5 测量值- 以英寸磅为单位的数值应视为标准值。公制当量在括号中。 1.6 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。 1.7 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 本规程主要用于检验锻造金属、锻造、轧制、机械加工零件或部件，其超声波等级通常在采购订单或其他合同文件中规定。

1.1 Purpose— This practice establishes the minimum requirements for ultrasonic examination of wrought products. Note 1: This practice was adopted to replace MIL-STD-2154, 30 Sept. 1982. This practice is intended to be used for the same applications as the document which it replaced. Users should carefully review its requirements when considering its use for new, or different applications, or both. 1.2 Application— This practice is applicable for examination of materials such as, wrought metals and wrought metal products having a thickness or cross section equal to 0.250 in. (6.35 mm) or greater. 1.2.1 Wrought Aluminum Alloy Products— Examination shall be in accordance with Practice B594 . Angle beam scans of wrought aluminum alloy products shall be performed in accordance with this practice as agreed upon by the purchaser and supplier. 1.3 Acceptance Class— When examination is performed in accordance with this practice, engineering drawings, specifications, or other applicable documents shall indicate the acceptance criteria. Five ultrasonic acceptance classes are defined in Table 1 . One or more of these classes may be used to establish the acceptance criteria or additional or alternate criteria may be specified. 1.4 Order of Precedence— Contractual requirements and authorized direction from the cognizant engineering organization may add to or modify the requirements of this practice. Otherwise, in the event of conflict between the text of this practice and the references cited herein, the text of this practice takes precedence. Nothing in this practice, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 1.5 Measurement Values— The values stated in inch-pounds are to be regarded as standard. The metric equivalents are in parentheses. 1.6 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. 1.7 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 This practice is intended primarily for the examination of wrought metals, forged, rolled, machined parts or components to an ultrasonic class most typically specified in the purchase order or other contract document.