1.1 本规范涵盖热锻特殊质量碳钢棒材。特殊质量的棒材应用包括锻造、热处理、冷拔、机加工和许多结构用途。钢筋选择指南包含在实践中 A400 。 1.2 钢筋应按照 表1 .可用钢筋的截面和尺寸见规范 A29/A29M .热锻特殊质量的碳钢棒材是按切割长度和盘绕生产的；应咨询制造商，了解根据化学成分生产的线圈的截面和尺寸。 再磷化和再硫化碳钢 E G H 任命 等级 碳 锰 磷 硫黄 领导 G12110 1211 最大0.13 0.60–0.90 0.07–0.12 0.10–0.15 。 G12120 1212 最大0.13 0.70–1.00 0.07–0.12 0.16–0.23 。 G12130 1213 最大0.13 0.70–1.00 0.07–0.12 0.24–0.33 。 G12150 1215 0.09（最大值） 0.75–1.05 0.04–0.09 0.26–0.35 。 。 12L14 最大0.15 0.85–1.15 0.04–0.09 0.26–0.35 0.15–0.35 1.3 规范中涵盖了商业质量的热锻碳钢筋 A575 。 1.4 某些最终用途可能需要卓越的表面质量，或特殊的化学限制、冶金特性、热处理或表面光洁度，而买方可以通过指定一个或多个可用的补充要求来获得这些要求。 1.5 以英寸-磅为单位的数值应视为标准。 1.6 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 special quality carbon steel bars. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses. A guide for the selection of steel bars is contained in Practice A400 . 1.2 The bars shall be furnished in the grades specified in Table 1 . Sections and sizes of bar steel available are covered in Specification A29/A29M . Hot-wrought special quality carbon steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition. Rephosphorized and Resulfurized Carbon Steel E, G, H Designation Grade Carbon Manganese Phosphorus Sulfur Lead G12110 1211 0.13 max 0.60–0.90 0.07–0.12 0.10–0.15 . G12120 1212 0.13 max 0.70–1.00 0.07–0.12 0.16–0.23 . G12130 1213 0.13 max 0.70–1.00 0.07–0.12 0.24–0.33 . G12150 1215 0.09 max 0.75–1.05 0.04–0.09 0.26–0.35 . . 12L14 0.15 max 0.85–1.15 0.04–0.09 0.26–0.35 0.15–0.35 1.3 Merchant quality hot-wrought carbon steel bars are covered in Specification A575 . 1.4 Some end uses may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment, or surface finishes which the purchaser may obtain by designating one or more of the available Supplementary Requirements. 1.5 The values stated in inch-pound units are to be regarded as standard. 1.6 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.