1.1 本规范涵盖主要用作涡轮转子盘和轮子的沉淀硬化铁基高温合金锻件。 1.2 涵盖两种热处理。选择将取决于设计、使用条件、机械性能和高温特性。 1.3 规范的所有规定 A788/A788M 适用，除非在此修订。 1.4 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。 1.5 本国际标准是根据世界贸易组织发布的《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。rade组织技术性贸易壁垒委员会。

1.1 This specification covers precipitation hardening iron base superalloy forgings which are primarily intended for use as turbine rotor disks and wheels. 1.2 Two heat treatments are covered. Selection will depend upon design, service conditions, mechanical properties, and elevated temperature characteristics. 1.3 All of the provisions of Specification A788/A788M , apply, except as amended herein. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 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.