1.1 本规范涵盖了根据机械性能要求生产的、用于非关键结构应用的热锻商业质量碳钢棒材和棒材尺寸形状（见 8.2 )。 1.2 商品级热锻钢筋有以下尺寸和截面: 1.2.1 直径或平面间距离小于3英寸[75毫米]的圆形、正方形和六边形。 1.2.2 最大尺寸小于3英寸[75毫米]的条形。 1.2.3 每英尺重量40.84以下的其他钢筋截面 磅/英尺[60.78千克/米]。 1.2.4 宽度小于等于6英寸[152毫米]，厚度大于0.203英寸[厚度大于5毫米，宽度小于等于150毫米]，且小于等于40的平面。 84磅/英尺或12英寸。 2. [77.4厘米 2. ]横截面积。 1.2.5 宽度超过6英寸至8英寸，0.230英寸及以上[厚度超过6毫米，厚度超过50毫米至200毫米]的平面 宽度为毫米]，厚度小于40.84磅/英尺[60.78千克/米]或12英寸。 2. [77.4厘米 2. ]横截面积。 1.2.6 符合机械性能要求的热锻商业级碳钢棒仅为直长度热锻。 1.3 某些应用程序可能需要一个或多个补充要求中显示的可用名称。 注1: 本规范涵盖了符合机械性能要求的特殊质量热锻碳素钢筋 A675/A675M 。 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-wrought merchant quality carbon steel bars and bar size shapes produced to mechanical property requirements and intended for noncritical constructional applications (see 8.2 ). 1.2 Merchant quality hot-wrought steel bar is available in the following ranges of size and section: 1.2.1 Rounds, squares, and hexagons with diameters or distance across flats under 3 in. [75 mm]. 1.2.2 Bar size shapes with maximum dimensions under 3 in. [75 mm]. 1.2.3 Other bar sections with weight per foot under 40.84 lb/ft [60.78 kg/m]. 1.2.4 Flats 6 in. [152 mm] or under in width, over 0.203 in. [over 5 mm in thickness up to 150 mm in width] in thickness, and under 40.84 lb/ft or 12 in. 2 [77.4 cm 2 ] in cross-sectional area. 1.2.5 Flats over 6 in. to 8 in., inclusive in width, 0.230 in. and over [over 6 mm in thickness and over 50 mm through 200 mm in width] in thickness and under 40.84 lb/ft [60.78 kg/m] or 12 in. 2 [77.4 cm 2 ] in cross-sectional area. 1.2.6 Hot-wrought merchant quality carbon steel bars subject to mechanical property requirements are hot wrought in straight lengths only. 1.3 Some applications may require one or more of the available designations shown under supplementary requirements. Note 1: Special quality hot-wrought carbon steel bars subject to mechanical property requirements are covered in Specification A675/A675M . 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.