1.1 本规范涵盖了一组常见要求，这些要求是根据以下ASTM规范，通过熔模铸造工艺生产的承压零件钢铸件的强制性要求: 规范标题 ASTM名称 碳钢铸件，适用于熔焊， A216/A216M 用于高温环境 钢铸件，马氏体不锈钢和合金，用于 A217/A217M 承压部件，适用于高- 温度服务 承压用奥氏体铸件 A351/A351M 部分 压力容器用铁素体和马氏体钢铸件- A352/A352M 含零件，适用于低温 服务 特殊热处理合金钢铸件，用于 A389/A389M 承压部件，适用于高- 温度服务 适用于压力应用的钢铸件 A487/A487M 铸件，铁镍铬和镍合金，Spe- 专用于压力保持部件 腐蚀性服务 A990/A990M 奥氏体-铁素体（双相）不锈钢铸件 承压部件 A995/A995M 1.2 本规范还涵盖了一组补充要求，这些补充要求可适用于其中所示的上述规范。这些要求是为了在需要额外测试或检查时使用，并且仅在买方在订单中单独规定时适用。 1.3 订购熔模铸造时，本规范的要求应优先于单个材料规范的要求。 1.4 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。 1.5 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。

1.1 This specification covers a group of common requirements that are mandatory for steel castings produced by the investment casting process for pressure-containing parts under each of the following ASTM Specifications: Title of Specification ASTM Designation Steel Castings, Carbon, Suitable for Fusion Welding, A216/A216M for High-Temperature Service Steel Castings, Martensitic Stainless and Alloy, for A217/A217M Pressure-Containing Parts, Suitable for High- Temperature Service Castings, Austenitic, for Pressure-Containing A351/A351M Parts Steel Castings, Ferritic and Martensitic, for Pressure- A352/A352M Containing Parts, Suitable for Low-Temperature Service Steel Castings, Alloy, Specially Heat-Treated, for A389/A389M Pressure-Containing Parts, Suitable for High- Temperature Service Steel Castings Suitable for Pressure Service A487/A487M Castings, Iron-Nickel-Chromium and Nickel Alloys, Spe- cially Controlled for Pressure-Retaining Parts for Corrosive Service A990/A990M Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts A995/A995M 1.2 This specification also covers a group of supplementary requirements, which may be applied to the above specifications as indicated therein. These requirements are provided for use when additional testing or inspection is desired, and apply only when specified individually by the purchaser in the order. 1.3 When investment casting is ordered, the requirements of this specification shall take precedence over the individual material specification requirements. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the 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.