1.1 本规范涵盖了在要求耐腐蚀、限制性机械性能或可控磁导率的应用中使用的切割长度和线圈的混凝土钢筋用变形和普通不锈钢棒。本规范具有最小实际抗拉强度与实际屈服强度之比（表3）。变形钢筋的标准尺寸和尺寸及其数字名称应为 表1 . 1.1.1 当买方需要受控磁导率产品时，提供了补充要求（S1）。补充要求S1仅适用于采购订单中规定的情况。 1.1.2 当买方要求有限的屈服强度范围和更高的实际抗拉强度与实际屈服强度之比时，提供了补充的受控机械性能要求（S2）。 补充要求S2仅适用于采购订单中规定的情况。 1.2 不锈钢合金的化学成分的选择应符合制造商和买方之间达成的协议所涉及的应用。这是实现所需耐腐蚀性或可控磁导率或两者的重要考虑因素，因为并非所有不锈钢都具有这些特性。 1.3 耐腐蚀性要求包含在第节中 11 和 附件A1 测试程序选项包括 附件A2 （快速宏细胞试验）或 附件A3 （裂纹梁试验）。 1.4 本规范强制性化学成分要求表中引入新合金的要求见 附件A5 . 1.5 三面变形钢筋的相对变形面积要求包含在 附件A4 . 1.6 钢筋具有三个最小屈服强度水平，即6000psi[420 MPa]、75000psi[520 MPa]和80000psi[550 MPa]，分别指定为60[420]级、75[520]级或80[550]级。 1.7 尺寸小于等于2英寸的普通钢筋。直径为[50.8 mm]的线圈或切割长度分别根据本规范在60[420]级、75[520]级和80[550]级中提供。必要时，机械测试应达到最接近的标称变形钢筋尺寸。规定变形和标记的要求不适用于普通钢筋。 1.8 当焊接不锈钢时，使用适合化学成分和预期用途或服务的程序。 注1: 不锈钢钢筋的焊接将在制造商发货后进行。结构焊接应按照最新版AWS D1.6/D1.6M、任何其他国际公认的不锈钢焊接规范或材料制造商建议的程序进行。AWS D1.6/D1.6M描述了填充金属的正确选择、温度控制以及性能、工艺评定和检验要求。 1.9 本规范适用于以英寸-磅为单位的订单（作为规范 A955 )或使用国际单位制（作为规范 A955M ). 1.10 本规范的正文引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本规范的要求。 1.11 以英寸-磅或国际单位制表示的数值应单独视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。合并两个系统的值可能会导致不符合规范。 1.12 本规范无意解决与其使用相关的所有安全问题（如有）。 本规范的用户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。 1.13 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 deformed and plain stainless steel bars for concrete reinforcement in cut lengths and coils used in applications requiring resistance to corrosion, restrictive mechanical properties, or controlled magnetic permeability. This specification has a minimum actual tensile strength to actual yield strength ratio (Table 3). The standard sizes and dimensions of deformed bars and their numerical designation shall be those listed in Table 1 . 1.1.1 A supplementary requirement (S1) is provided for use where a controlled magnetic permeability product is required by the purchaser. Supplementary Requirement S1 applies only when specified in the purchase order. 1.1.2 A supplementary controlled mechanical properties requirement (S2) is provided for use where a restricted yield strength range and a higher actual tensile to actual yield strength ratio is required by the purchaser. Supplementary Requirement S2 applies only when specified in the purchase order. 1.2 The chemical composition of the stainless steel alloy shall be selected for suitability to the application involved by agreement between the manufacturer and the purchaser. This is an important consideration in achieving the desired corrosion resistance or controlled magnetic permeability, or both, because these properties are not provided by all stainless steels. 1.3 Corrosion Resistance requirements are contained in Section 11 and Annex A1 and the test procedures options are Annex A2 (Rapid Macrocell Test) or Annex A3 (Cracked Beam Test). 1.4 The requirements for introduction of new alloys into a mandatory chemical composition requirements table in this specification are given in Annex A5 . 1.5 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4 . 1.6 Bars are of three minimum yield strength levels, namely, 60 000 psi [420 MPa], 75 000 psi [520 MPa], and 80 000 psi [550 MPa], designated as Grade 60 [420], Grade 75 [520], or Grade 80 [550], respectively. 1.7 Plain bars in sizes up to and including 2 in. [50.8 mm] in diameter in coils or cut lengths are furnished in accordance with this specification in Grade 60 [420], Grade 75 [520], and Grade 80 [550], respectively. Mechanical testing, when required, shall be to the nearest nominal deformed bar size. Requirements providing for deformations and marking shall not be applicable to plain bars. 1.8 When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service. Note 1: Welding of stainless steel reinforcement would occur after shipment from the manufacturer. Structural welding should be performed in accordance with the latest edition of AWS D1.6/D1.6M, any other internationally accepted stainless steel welding code, or a procedure suggested by the material manufacturer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification and inspection requirements. 1.9 This specification is applicable for orders in either inch-pound units (as Specification A955 ) or in SI units (as Specification A955M ). 1.10 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.11 The values stated in either inch-pound 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 nonconformance with the specification. 1.12 This specification 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 specification to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.13 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.