1.1 本规范涵盖了化学成分与标准锻造等级相似的工具钢铸件。 1.2 涵盖了几个等级，并由所示的化学成分指定 表1 . 成分，% 等级 CS-7 CH-12 第13章 CD-51 元素 UNS T91907 碳 0.45–0.55 0.30–0.40 0.30–0.42 0.85–1.00 锰 0.40–0.80 最大0.75 最大0.75 1.00–1.30 硅 0.60–1.00 最大1.50 最大1.50 最大1.50 硫黄 最大0.03 最大0.03 最大0.03 最大0.03 磷 最大0.03 最大0.03 最大0.03 最大0.03 铬 3.00–3.50 4.75–5.75 4.75–5.75 0.40–1.00 钼 1.20–1.60 1.25–1.75 1.25–1.75 . 钒 . 0.20–0.50 0.75–1.20 最大0.30 钴 . . . . 钨合金 . 1.00–1.70 . 0.40–0.60 镍 . . . . 1.3 以国际单位制或英寸-磅单位表示的值应单独视为标准值。 在文本中，国际单位制显示在括号中。每个系统中所述的值不一定是完全等效的；因此，为确保符合标准，每个系统应独立使用，两个系统的值不得组合。英寸-磅单位适用于根据规范订购的材料 A597 订购A597M的材料采用国际单位制。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

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 . Composition, % Grade CS-7 CH-12 CH-13 CD-51 Element UNS T91907 Carbon 0.45–0.55 0.30–0.40 0.30–0.42 0.85–1.00 Manganese 0.40–0.80 0.75 max 0.75 max 1.00–1.30 Silicon 0.60–1.00 1.50 max 1.50 max 1.50 max Sulfur 0.03 max 0.03 max 0.03 max 0.03 max Phosphorus 0.03 max 0.03 max 0.03 max 0.03 max Chromium 3.00–3.50 4.75–5.75 4.75–5.75 0.40–1.00 Molybdenum 1.20–1.60 1.25–1.75 1.25–1.75 . Vanadium . 0.20–0.50 0.75–1.20 0.30 max Cobalt . . . . Tungsten . 1.00–1.70 . 0.40–0.60 Nickel . . . . 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 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. Inch-pound units are applicable to material ordered to Specification A597 and SI units for material ordered to A597M. 1.4 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.