1.1 本规范涵盖化学成分类似于标准锻造等级的工具钢铸件。 1.2 涵盖多个等级，并按化学成分指定，如所示 表1 . 1.3 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。在文本中，国际单位显示在括号中。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。英寸磅单位适用于按规范订购的材料 A597型 订购至597M的材料采用国际单位制。

1.1 This specification covers tool steel castings having chemical compositions similar to those of the standard wrought grades. 1.2 Several grades are covered and are designated by chemical composition shown in Table 1 . 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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. Inch-pound units are applicable to material ordered to Specification A597 and SI units for material ordered to A597M.