1.1 本规范涵盖了熔模铸造工艺生产的铸件的一组强制性要求，以满足ASTM发布的以下铸钢件规范的冶金要求。 ASTM名称 规范标题 A27/A27M 通用碳素钢铸件 A128/A128M 奥氏体锰钢铸件 A148/A148M 结构用高强度钢铸件 A297/A297M 一般应用的耐热铁铬和铁铬镍铸钢件 A447/A447M 钢铸件，铬镍铁合金（25- 12级），用于高温环境 A494/A494M 镍和镍合金铸件 A560/A560M 铬镍合金铸件 A732/A732M 一般应用的熔模碳钢和低合金钢铸件，以及高温高强度钴合金 A743/A743M 一般应用的耐腐蚀铁铬、铁铬镍铸件 A744/A744M 严酷环境用耐腐蚀铁铬镍铸件 A747/A747M 沉淀硬化不锈钢铸件 A890/A890M 一般应用的双相（奥氏体/铁素体）铁铬镍钼耐腐蚀铸件 A915/A915M 化学要求类似于标准锻造等级的碳素钢和合金钢铸件 A958/A958M 碳及合金铸钢件，有拉伸要求，化学要求类似于标准锻造等级 A1002型 镍铝有序合金铸件 1.2 本规范还涵盖了一组补充要求，这些补充要求可能适用于其中所示的上述规范。当需要额外测试或检查时，提供这些测试或检查，并且仅当买方在订单中单独指定时适用。 1.3 订购熔模铸件时，本规范中规定的要求构成材料规范的组成部分。 如有冲突，本规范的要求应优先于单独的材料规范要求。 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 requirements that are mandatory for castings produced by the investment casting process to meet the metallurgical requirements of the following steel casting specifications issued by ASTM. ASTM Designation Title of Specification A27/A27M Steel Castings, Carbon, for General Application A128/A128M Steel Castings, Austenitic Manganese A148/A148M Steel Castings, High-Strength, for Structural Purposes A297/A297M Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat-Resistant, for General Application A447/A447M Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service A494/A494M Castings, Nickel and Nickel Alloy A560/A560M Castings, Chromium-Nickel Alloy A732/A732M Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures A743/A743M Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application A744/A744M Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service A747/A747M Steel Castings, Stainless, Precipitation Hardening A890/A890M Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application A915/A915M Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades A958/A958M Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades A1002 Castings, Nickel-Aluminum Ordered Alloy 1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as indicated therein. These 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 castings are ordered, the requirements stated in this specification form an integral part of the material specification. In cases of conflict, 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 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.