1.1 本规范涵盖以直长度和卷材生产的冷加工碳和合金钢筋。冷加工棒材适用于热处理、机械加工成部件、或在完工状态下用作轴系、或用于建筑应用或其他类似用途( 注1 ). 钢的牌号通过牌号或化学成分来识别。 注1: 钢筋选择指南包含在实践中 A400 . 1.2 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。 补充要求仅在买方单独规定时适用。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 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 cold-finished carbon and alloy steel bars produced in straight length and coil. Cold-finished bars are suitable for heat treatment, for machining into components, or for use in the as-finished condition as shafting, or in constructional applications, or for other similar purposes ( Note 1 ). Grades of steel are identified by grade numbers or by chemical composition. Note 1: A guide for the selection of steel bars is contained in Practice A400 . 1.2 Some end uses may require one or more of the available designations shown under Supplementary Requirements. Supplementary requirements shall apply only when specified individually by the purchaser. 1.3 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. 1.4 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.