ASTM A706/A706M-22a
(Specification)Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
Standard Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement
ABSTRACT
This specification covers deformed and plain low-alloy steel bars in cut lengths or coils for concrete reinforcement intended for applications. Restrictive mechanical properties and chemical composition are required for compatibility with controlled tensile property applications or to enhance weldability. The steel shall be electric-furnace, basic-oxygen, or open-hearth processed. Tension test, bend test, and one set of dimensional property tests including bar weight and spacing, height, and gap of deformations shall be made of each bar size rolled from a heat. All tests and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specified, and shall be conducted so as not to interfere unnecessarily with the operation of the works. A retest shall be provided when the specimen fails to meet the strength and elongation property requirements of the specification.
SCOPE
1.1 General—This specification covers deformed and plain low-alloy steel bars in cut lengths and 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.
1.2 Grade—Bars are of three minimum yield strength levels: namely, 60 000 psi [420 MPa], 80 000 psi [550 MPa], and 100 000 psi [690 MPa] designated as Grade 60 [420], Grade 80 [550], and Grade 100 [690], respectively.
1.3 Plain bars, in sizes up to and including 21/2 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. Requirements providing for deformations and marking shall not be applicable.
1.4 Controlled Tensile Properties—This specification limits tensile properties (Table 2) to provide the desired yield/tensile properties for controlled tensile property applications.
1.5 Welding—This specification limits chemical composition (6.2) and carbon equivalent (6.4) to enhance the weldability of the material. 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, preheat/interpass temperatures, as well as, performance and procedure qualification requirements.
Note 1: As a result of the 117 000 psi minimum tensile strength for Grade 100 [690], users of this specification should be aware that ACI 318 Type 1 mechanical splice requirements of 125 % of specified yield strength requirements in tension and compression, found in many acceptance criteria, may result in an invalid mechanical splice qualification or verification test when the tensile strength of the bar is between 117 000 psi and 125 000 psi.
1.6 Annex A2 describes the methods for determination of uniform elongation (Elu). Annex A2 is mandatory when Supplementary Requirement S1 is specified by the purchaser (see 4.2.6).
1.7 Requirements for alternate bar sizes are presented in Annex A1. The requirements in Annex A1 only apply when specified by the purchaser (see 4.2.5).
1.8 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.
1.9 This specification is applicable for orders in either inch-pound units (Specification A706) or in SI units [Specification A706M].
1.10 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 ...
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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.
Designation: A706/A706M − 22a
Standard Specification for
Deformed and Plain Low-Alloy Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designation A706/A706M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
Grade 100 [690], users of this specification should be aware that ACI 318
1. Scope*
Type 1 mechanical splice requirements of 125 % of specified yield
1.1 General—This specification covers deformed and plain
strength requirements in tension and compression, found in many accep-
low-alloy steel bars in cut lengths and coils for concrete
tance criteria, may result in an invalid mechanical splice qualification or
reinforcement intended for applications where restrictive me-
verification test when the tensile strength of the bar is between 117 000 psi
and 125 000 psi.
chanical properties and chemical composition are required for
compatibility with controlled tensile property applications or to
1.6 Annex A2 describes the methods for determination of
enhance weldability. The standard sizes and dimensions of
uniform elongation (El ). Annex A2 is mandatory when
u
deformed bars and their number designations are given in
Supplementary Requirement S1 is specified by the purchaser
Table 1.
(see 4.2.6).
1.2 Grade—Bars are of three minimum yield strength lev-
1.7 Requirements for alternate bar sizes are presented in
els: namely, 60 000 psi [420 MPa], 80 000 psi [550 MPa], and
Annex A1. The requirements in Annex A1 only apply when
100 000 psi [690 MPa] designated as Grade 60 [420], Grade 80
specified by the purchaser (see 4.2.5).
[550], and Grade 100 [690], respectively.
1
1.3 Plain bars, in sizes up to and including 2 ⁄2 in. [63.5 mm]
1.8 The text of this specification references notes and
in diameter in coils or cut lengths, when ordered, shall be
footnotes that provide explanatory material. These notes and
furnished under this specification. For ductility properties
footnotes, excluding those in tables, shall not be considered as
(elongation and bending), test provisions of the nearest smaller
requirements of this specification.
nominal diameter deformed bar size shall apply. Requirements
1.9 This specification is applicable for orders in either
providing for deformations and marking shall not be appli-
inch-pound units (Specification A706) or in SI units [Specifi-
cable.
cation A706M].
1.4 Controlled Tensile Properties—This specification limits
tensile properties (Table 2) to provide the desired yield/tensile 1.10 The values stated in either inch-pound units or SI units
properties for controlled tensile property applications.
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
1.5 Welding—This specification limits chemical composi-
system may not be exact equivalents; therefore, each system
tion (6.2) and carbon equivalent (6.4) to enhance the weldabil-
shall be used independently of the other. Combining values
ity of the material. When this steel is to be welded, a welding
from the two systems may result in non-conformance with this
procedure suitable for the chemical composition and intended
specification.
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
1.11 This standard does not purport to address all of the
Welding Code describes the proper selection of the filler
safety concerns, if any, associated with its use. It is the
metals, preheat/interpass temperatures, as well as, performance
responsibility of the user of this standard to establish appro-
and procedure qualification requirements.
priate safety, health, and environmental practices and deter-
NOTE 1—As a result of the 117 000 psi minimum tensile strength for
mine the applicability of regulatory limitations prior to use.
1.12 This international standard was developed in accor-
1 dance with internationally recognized principles on standard-
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
ization established in the Decision on Principles for the
A01.05 on Steel Reinforcement.
Development of International Standards, Guides and Recom-
Current edition approved Dec. 1, 2022. Published February 2023. Originally
mendations issued by the World Trade Organizat
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A706/A706M − 22 A706/A706M − 22a
Standard Specification for
Deformed and Plain Low-Alloy Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designation A706/A706M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 General—This specification covers deformed and plain low-alloy steel bars in cut lengths and 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.
1.2 Grade—Bars are of twothree minimum yield strength levels: namely, 60 000 psi [420 MPa] and MPa], 80 000 psi [550 MPa],
and 100 000 psi [690 MPa] designated as Grade 60 [420] and [420], Grade 80 [550], and Grade 100 [690], respectively.
1
1.3 Plain bars, in sizes up to and including 2 ⁄2 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. Requirements providing for deformations and marking shall not be applicable.
1.4 Controlled Tensile Properties—This specification limits tensile properties (Table 2) to provide the desired yield/tensile
properties for controlled tensile property applications.
1.5 Welding—This specification limits chemical composition (6.2) and carbon equivalent (6.4) to enhance the weldability of the
material. 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, preheat/interpass temperatures, as well as, performance and procedure
qualification requirements.
NOTE 1—As a result of the 117 000 psi minimum tensile strength for Grade 100 [690], users of this specification should be aware that ACI 318 Type 1
mechanical splice requirements of 125 % of specified yield strength requirements in tension and compression, found in many acceptance criteria, may
result in an invalid mechanical splice qualification or verification test when the tensile strength of the bar is between 117 000 psi and 125 000 psi.
1.6 Annex A2 describes the methods for determination of uniform elongation (El ). Annex A2 is mandatory when Supplementary
u
Requirement S1 is specified by the purchaser (see 4.2.6).
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved July 1, 2022Dec. 1, 2022. Published July 2022February 2023. Originally approved in 1974. Last previous edition approved in 20162022 as
A706/A706M – 16.A706/A706M – 22. DOI: 10.1520/A0706_A0706M-22.10.1520/A0706_A0706M-22A.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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A706/A706M − 22a
TABLE 1 Deformed Bar Designation Numbers, Nominal Weights [Masses], Nominal Dimensions, and Deformation Requirements
A
Nominal Dimensions Deformation Requirements, in. [mm]
Bar
Nominal Weight, lb/ft
Desig-
Maximum Gap
[Nominal Mass,
Diameter, Cross-Sectional Area Perimeter, Maximum Average Minimum Average
nation
(Chord of 12.5 % of
2 2
kg/m]
in. [mm] in. [mm ] in. [mm] Spacing Height
No.
Nominal Perimeter)
3 [10] 0.376 [ 0.560] 0.375 [ 9.5] 0.11 [ 71] 1.178 [ 29.9] 0.262 [ 6.7] 0.015 [0.38] 0.143 [ 3.6]
4 [13] 0.668 [ 0.994] 0.500 [12.7] 0.20 [ 129] 1.571 [ 39.9] 0.350 [ 8.9] 0.020 [0.51] 0.191 [ 4.9]
5 [16] 1.043 [ 1.552] 0.625 [15.9] 0.31 [ 199] 1.963 [ 49.9] 0.437 [11.1] 0.028 [0.71] 0.239 [ 6.1]
6 [19] 1.502 [ 2.235] 0.750 [19.1] 0.44 [ 284] 2.356 [ 59.8] 0.525 [13.3] 0.038 [0.97] 0.286 [ 7.3]
7 [22] 2.044 [ 3.042] 0.875 [22.2] 0.60 [ 387] 2.749 [ 69.8] 0.612 [15.5] 0.04
...
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