1.1 本规范涵盖热轧碳钢（CS）板材和带材，以卷和切割长度为单位，其中规定的最大碳含量范围在0.15至0.25之间 % 规定锰范围的最大值不超过0.90 %. 这种材料按化学成分排序。 1.2 本规范不适用于规范所涵盖的钢材 635/A635米 . 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。每个系统中规定的值可能不完全相等； 因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。 1.4 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers hot-rolled carbon steel (CS) sheet and strip, in coils and cut lengths, in which the maximum of the specified carbon range is over 0.15 and not over 0.25 % and the maximum of the specified manganese range is not over 0.90 %. This material is ordered to chemical composition. 1.2 This specification is not applicable to the steels covered by Specification A635/A635M . 1.3 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 non-conformance with the standard. 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.