1.1 本规范涵盖热轧、碳素、结构、高强度低合金、具有改进成形性的高强度低合金钢，以及卷制和切割长度的超高强度钢板和钢带。 1.2 热轧钢板和钢带的名称如下 4.1 。 1.3 本规范不适用于本规范所涵盖的钢材 A635/A635米 。 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。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。 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 hot-rolled, carbon, structural, high-strength low-alloy, high-strength low-alloy with improved formability, and ultra-high strength steel sheet and strip, in coils and cut lengths. 1.2 Hot rolled steel sheet and strip is available in the designations as listed in 4.1 . 1.3 This specification is not applicable to the steel covered by Specification A635/A635M . 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 non-conformance 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.