1.1 本规范 2. 涵盖结构质量的碳素钢型材、板材和棒材，用于桥梁和建筑物的铆接、螺栓连接或焊接施工，以及一般结构用途。 1.2 在买方要求进行额外测试或附加限制的情况下，提供了补充要求。此类要求仅在采购订单中规定时适用。 1.3 当焊接钢材时，应采用适合钢材等级和预期用途或服务的焊接工艺。见规范附录X3 A6/A6M 有关焊接性的信息。 1.4 本规范的文本包含注释或脚注，或两者兼有，以提供解释性材料。此类注释和脚注（不包括表和图中的注释和脚注）不包含任何强制性要求。 1.5 对于由线圈生产且未经热处理或仅进行应力消除的结构产品，规范的附加要求，包括附加测试要求和附加测试结果报告 A6/A6M 申请 1.6 以英寸-磅单位或国际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不是精确的等价物；因此，每个系统将独立于其他系统使用，而不以任何方式组合值。 1.7 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《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification 2 covers carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes. 1.2 Supplementary requirements are provided for use where additional testing or additional restrictions are required by the purchaser. Such requirements apply only when specified in the purchase order. 1.3 When the steel is to be welded, a welding procedure suitable for the grade of steel and intended use or service is to be utilized. See Appendix X3 of Specification A6/A6M for information on weldability. 1.4 The text of this specification contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements. 1.5 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A6/A6M apply. 1.6 The values stated in either inch-pound units or SI 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 exact equivalents; therefore, each system is to be used independently of the other, without combining values in any way. 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.