1.1 本规范涵盖指定的铝合金高强度铸件，如 表1 . 1.2 本规范涵盖的铸件用于机身、导弹和其他需要高强度、延展性和良好铸件的关键应用。 1.3 合金和回火名称符合ANSI H35.1/H35.1 （M） 。 1.4 除非订单规定了“M”规格名称，否则材料应以英寸-磅为单位提供。 1.5 有关本规范中新铝和铝合金及其性能的验收标准，请参阅 附件A1 和 附件A2 . 1.6 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。 每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.7 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。 1.8 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。

1.1 This specification covers aluminum-alloy high-strength castings designated as shown in Table 1 . 1.2 Castings covered by this specification are intended for use in airframe, missile, and other critical applications where high strength, ductility, and sound castings are required. 1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). 1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units. 1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2 . 1.6 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.7 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. 1.8 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.