ASTM A706/A706M-09b

    Standard Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement


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    1. Scope

    1.1 GeneralThis specification covers deformed and plain low-alloy steel bars in cut lengths or coils for concrete reinforcement intended for applications where restrictive mechanical properties and chemical composition are required for compatibility with controlled tensile property applications or to enhance weldability. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1. The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables, shall not be considered as requirements of this specification.

    1.2 GradeBars are of two minimum yield strength levels: namely, 60 000 psi [420 MPa] and 80 000 [550], designated as Grade 60 [420] and Grade 80 [550], respectively.

    Note 1—Bars designated as Grade 80 [550], which were introduced in the A706/A706M 09a revision, may be outside consideration of consensus design codes and specifications.

    1.3 Plain bars, in sizes up to and including 2½ in. [63.5 mm] in diameter in coils or cut lengths, when ordered, shall be furnished under this specification. For ductility properties (elongation and bending), test provisions of the nearest smaller nominal diameter deformed bar size shall apply.

    1.4 Controlled Tensile PropertiesThis specification limits mechanical properties (Table 2) to provide the desired yield/tensile properties for controlled tensile property applications.

    1.5 WeldingThis specification limits chemical composition (6.2) and carbon equivalent (6.4) to enhance the weldability of the material. When 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. This document describes the proper selection of the filler metals, preheat/interpass temperatures, as well as, performance and procedure qualification requirements.

    1.6 This specification is applicable for orders in either inch-pound units (Specification A706) or in SI units [Specification A706M].

    1.7 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this 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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    U.S. Federal Standard

    Fed. Std. No.  Marking for Shipment (Civil Agencies)

    AWS Standard

    AWS D1.4/D1.4M Structural Welding Code--Reinforcing Steel

    ASTM Standards

    A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling

    A370 Test Methods and Definitions for Mechanical Testing of Steel Products

    A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel, and Alloy Steel

    A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

    A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment

    A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

     U.S. Military Standard

    MIL-STD-129 Marking for Shipment and Storage


    ICS Code

    ICS Number Code 77.140.15 (Steels for reinforcement of concrete)

    UNSPSC Code

    UNSPSC Code 30103623(Reinforcing bar or rebar or mesh)


    Referencing This Standard

    DOI: 10.1520/A0706_A0706M-09B

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM A706 / A706M-09b, Standard Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement, ASTM International, West Conshohocken, PA, 2009, www.astm.org

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