1.1 本规范涵盖一般耐腐蚀应用的铁铬和铁铬镍合金铸件。本规范涵盖的等级代表适用于各种腐蚀环境的广泛应用的合金铸件类型。 注1: 对于用于严重耐腐蚀环境的合金铸件，应参考规范 A744/A744M . 对于一般耐热合金铸件，应参考规范 A297/A297M . 对于耐腐蚀的镍合金铸件，应参考规范 A494/A494M . 1.2 以英寸-磅单位或国际单位表示的数值应单独视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。合并两个系统的值可能会导致不符合规范。 英寸磅单位适用于按规范订购的材料 A743型 按规范订购的材料的国际单位制 A743M . 1.3 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 iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application. The grades covered by this specification represent types of alloy castings suitable for broad ranges of application which are intended for a wide variety of corrosion environments. Note 1: For alloy castings for severe corrosion-resistant service, reference should be made to Specification A744/A744M . For general heat-resistant alloy castings, reference should be made to Specification A297/A297M . For nickel alloy castings for corrosion-resistant service, reference should be made to Specification A494/A494M . 1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Inch-pound units are applicable for material ordered to Specification A743 and SI units for material ordered to Specification A743M . 1.3 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.