1.1 本规范涵盖切割长度的变形和普通碳钢筋以及混凝土钢筋的卷材。 附件A2 本规范涵盖了用于其他应用的变形钢筋。如果最终产品满足本规范的所有其他要求，则允许使用含有合金添加剂的钢筋，如钢铁技术协会和汽车工程师协会系列合金钢。中给出了变形钢筋的标准尺寸和尺寸及其编号 表1 . 1.2 除非指定用于中的其他应用 附件A2 ，钢筋具有四个最低屈服强度水平:即40000 psi[280 MPa]、60000 psi[420 MPa]、80000 psi[550 MPa]和100000 psi[690 MPa]，分别指定为40[280]级、60[420]级、80[550]级和100[690]级。 注1: 本规范于2015年引入了100[690]级钢筋。与规定抗拉强度与规定屈服强度之比在1.25至1.50之间的较低等级相比，100[690]级钢筋的规定抗拉强度和规定屈服强度的比值为1.15。因此，本规范的用户应意识到，当100[690]级钢筋用于强度受钢筋抗拉强度控制的结构构件（主要是梁和板）时，屈服后的安全裕度较低，失效警告也会减少。 由于100级[690]的规定抗拉强度与规定屈服强度之比较低，为1.15，本规范的用户应注意，ACI 318 1型机械和焊接接头要求在许多验收标准中发现，拉伸和压缩规定屈服强度要求的125%不适用于100级[669]。机械和焊接接头应满足100[690]级115 000 psi[790 MPa]的最低规定抗拉强度。 注2: 本规范的用户需要意识到，一致的设计规范和规范可能不承认No。 20[64]棒材，本规范中包含的最大棒材。用20号[64]钢筋加固的结构构件可能需要建筑官员或其他适当机构的批准，并需要特殊的细节设计，以确保在使用和系数荷载下具有足够的性能。 1.3 尺寸小于等于2的普通钢筋 1. / 2. 当订购时，应根据本规范提供40[280]级、60[420]级、80[550]级和100[690]级直径为英寸[63.5 mm]的线圈或切割长度。对于延性性能（伸长率和弯曲度），应适用最接近的较小标称直径变形钢筋尺寸的试验规定。 提供变形和标记的要求不适用。 注3: 应谨慎对待本规范中材料的焊接，因为未包含增强其可焊性的具体规定。当要焊接这种钢时，应使用适合化学成分和预期用途或服务的焊接程序。建议使用最新版本的AWS D1.4/D1.4M。AWS D1.4/D1.4M焊接规范描述了填充金属和预热/层间温度的正确选择，以及性能和工艺评定要求。 1.4 替代钢筋尺寸的要求如所示 附件A1 。中的要求 附件A1 仅在买方指定的情况下适用（参见 4.2.4 ). 1.5 本规范的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表中的注释和脚注）不应被视为规范的要求。 1.6 本规范适用于以英寸磅为单位的订单（作为规范 A615 )或国际单位制（如规范所示 615万 ). 1.7 以英寸磅单位或国际单位制表示的数值应单独视为标准。在正文中，国际单位制显示在括号中。 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。将两个系统的值组合在一起可能会导致不符合规范。 1.8 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 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 deformed and plain carbon-steel bars in cut lengths and coils for concrete reinforcement. Annex A2 of this specification covers deformed bars for use for other applications. Steel bars containing alloy additions, such as with the Association for Iron and Steel Technology and the Society of Automotive Engineers series of alloy steels, are permitted if the resulting product meets all the other requirements of this specification. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1 . 1.2 Unless specified for use for other applications in Annex A2 , bars are of four minimum yield strength levels: namely, 40 000 psi [280 MPa], 60 000 psi [420 MPa], 80 000 psi [550 MPa], and 100 000 psi [690 MPa], designated as Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690], respectively. Note 1: Grade 100 [690] reinforcing bars were introduced in this specification in 2015. In contrast to the lower grades, which have ratios of specified tensile strength to specified yield strength that range from 1.25 to 1.50, Grade 100 [690] reinforcing bars have a ratio of specified tensile strength to specified yield strength of 1.15. Users of this specification should be aware that there will, therefore, be a lower margin of safety and reduced warning of failure following yielding when Grade 100 [690] bars are used in structural members where strength is governed by the tensile strength of the reinforcement, primarily in beams and slabs. As a result of the lower specified tensile strength to specified yield strength ratio of 1.15 for Grade 100 [690], users of this specification should be aware that ACI 318 Type 1 mechanical and welded splice requirements found in many acceptance criteria of 125 % of specified yield strength requirements in tension and compression are not applicable to Grade 100 [690]. Mechanical and welded splices should meet a minimum specified tensile strength of 115 000 psi [790 MPa] for Grade 100 [690]. Note 2: Users of this specification need to be aware that consensus design codes and specifications may not recognize the use of the No. 20 [64] bar, the largest bar included in this specification. Structural members reinforced with No. 20 [64] bars may require approval of the building official or other appropriate authority and require special detailing to ensure adequate performance at service and factored loads. 1.3 Plain bars, in sizes up to and including 2 1 / 2 in. [63.5 mm] in diameter in coils or cut lengths, when ordered shall be furnished under this specification in Grade 40 [280], Grade 60 [420], Grade 80 [550], and Grade 100 [690]. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameter deformed bar size shall apply. Requirements providing for deformations and marking shall not be applicable. Note 3: Welding of the material in this specification should be approached with caution since no specific provisions have been included to enhance its weldability. When this steel is to be welded, a welding procedure suitable for the chemical composition and intended use or service should be used. The use of the latest edition of AWS D1.4/D1.4M is recommended. The AWS D1.4/D1.4M Welding Code describes the proper selection of the filler metals and preheat/interpass temperatures, as well as performance and procedure qualification requirements. 1.4 Requirements for alternate bar sizes are presented in Annex A1 . The requirements in Annex A1 only apply when specified by the purchaser (see 4.2.4 ). 1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification. 1.6 This specification is applicable for orders in either inch-pound units (as Specification A615 ) or in SI units (as Specification A615M ). 1.7 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 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 specification. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.9 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.