1.1 本规范涵盖了符合化学成分要求的结构质量碳钢板。 1.2 这些钢板有几种标准钢种和非标准钢种。 1.3 板材通常在轧制（热轧）状态下提供。 1.4 对于订单上可能指定的附加要求，提供了补充要求。 1.5 当要焊接钢材时，假设将使用适合钢材等级和预期用途或服务的焊接程序。见规范附录X3 A6/A6M 有关可焊性的信息。 1.6 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。 1.7 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 structural quality carbon steel plates furnished to chemical composition requirements. 1.2 The plates are available in several standard steel grades and non-standard grades. 1.3 The plates are usually furnished in the as-rolled (hot-rolled) condition. 1.4 Supplementary requirements are provided for additional requirements that may be specified on the order. 1.5 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability. 1.6 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. 1.7 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.