1.1 本规范涵盖按化学成分生产的热锻商用优质碳素钢棒。商品级钢筋用于结构和类似的杂项钢筋应用，涉及生产非关键零件时使用的中度冷弯、中度热成型、冲孔和焊接。中度冷弯涉及较大的弯曲半径，弯曲轴与轧制方向横向。 1.2 本规范涵盖了特殊质量的热锻碳素钢棒 A576型 . 1.3 某些最终用途可能需要补充要求中所示的一个或多个可用名称。 1.4 以英寸表示的值- 磅单位应视为标准单位。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 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 covers hot-wrought merchant quality carbon steel bars produced to a chemical composition. Merchant quality bars are used for structural and similar miscellaneous bar applications involving moderate cold bending, moderate hot forming, punching, and welding as used in the production of noncritical parts. Moderate cold bending involves a generous bend radius with the axis of the bend transverse to the direction of rolling. 1.2 Special quality hot-wrought carbon steel bars are covered in Specification A576 . 1.3 Some end uses may require one or more of the available designations shown under Supplementary Requirements. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.