ASTM A722/A722M-18

Standard Specification for High-Strength Steel Bars for Prestressed Concrete

ABSTRACT
This specification covers uncoated high-strength steel bars intended for use in pretensioned and post-tensioned prestressed concrete construction or in prestressed ground anchors. Two types of bars are considered: Type I bar, which has a plain surface and Type II bar, which has surface deformations. The bars shall be rolled from properly identified heats of ingot cast or strand cast steel. The bars shall be subjected to cold-stressing and then shall be stress-relieved to produce the prescribed mechanical properties. Yield strength, elongation, and tension tests shall be performed.
SCOPE
1.1 This specification covers Type I and Type II high-strength steel bars intended for use in prestressed concrete construction or in prestressed ground anchors. Type I bars have a plain surface. Type II bars have surface deformations. Bars are of a minimum tensile strength level of 150 000 psi [1035 MPa].  
1.2 A supplementary requirement (S1) is provided for use where bend tests of bars are required by the purchaser. The supplementary requirement applies only when specified in the purchase order.  
1.3 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.  
1.4 This specification is applicable for orders in either inch-pound units (as Specification A722) or in SI units (as Specification A722M).  
1.5 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 non-conformance with the specification.  
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.

General Information

• Status: Published
• Publication Date: 31-Aug-2018
• ICS: 77.140.15 - Steels for reinforcement of concrete
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Refers: ASTM A370-15 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Nov-2015
• Refers: ASTM A370-17 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jan-2017
• Refers: ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2017
• Refers: ASTM A700-14(2019) - Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
• Effective Date: 01-Nov-2019
• Refers: ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jul-2019
• Refers: ASTM A700-14 - Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
• Effective Date: 01-Nov-2014

Standards Content (Sample)

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: A722/A722M −18
Standard Specification for
1
High-Strength Steel Bars for Prestressed Concrete
This standard is issued under the fixed designationA722/A722M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers Type I and Type II high-
A370Test Methods and Definitions for Mechanical Testing
strength steel bars intended for use in prestressed concrete
of Steel Products
constructionorinprestressedgroundanchors.TypeIbarshave
A700Guide for Packaging, Marking, and Loading Methods
a plain surface. Type II bars have surface deformations. Bars
for Steel Products for Shipment
are of a minimum tensile strength level of 150 000 psi [1035
A751Test Methods and Practices for Chemical Analysis of
MPa].
Steel Products
3
1.2 A supplementary requirement (S1) is provided for use
2.2 Military Standard:
where bend tests of bars are required by the purchaser. The
MIL-STD-129Marking for Shipment and Storage
supplementary requirement applies only when specified in the 3
2.3 U.S. Federal Standard:
purchase order.
Fed. Std. 123Marking for Shipment (Civil Agencies)
1.3 The text of this specification references notes and
3. Ordering Information
footnotes which provide explanatory material.These notes and
footnotes (excluding those in tables and figures) shall not be 3.1 Orders for high-strength steel bars under this specifica-
considered as requirements of the specification. tion shall contain the following information:
3.1.1 Quantity,
1.4 This specification is applicable for orders in either
3.1.2 Size and length,
inch-pound units (as Specification A722) or in SI units (as
3.1.3 Type I or Type II, and
Specification A722M).
3.1.4 ASTM designation A722 [A722M] and year-date of
issue.
1.5 The values stated in either inch-pound or SI units are to
beregardedseparatelyasstandard.Withinthetext,theSIunits
3.2 Thepurchasershallhavetheoptiontospecifyadditional
are shown in brackets. The values stated in each system may
requirements, including but not limited, to the following:
not be exact equivalents; therefore, each system shall be used
3.2.1 Report on chemical composition (5.1),
independently of the other. Combining values from the two
3.2.2 Special inspection requirements (14.2),
systems may result in non-conformance with the specification.
3.2.3 Load-elongation curve (16.2),
3.2.4 Special preparation for delivery, if desired (see Sec-
1.6 This international standard was developed in accor-
tion 17), and
dance with internationally recognized principles on standard-
3.2.5 Supplementary requirement (S1).
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Materials and Manufacture
mendations issued by the World Trade Organization Technical
4.1 Thebarsshallberolledfromproperlyidentifiedheatsof
Barriers to Trade (TBT) Committee.
mold-cast or strand-cast steel. The standard sizes and dimen-
sions of Type I and II bars shall be those listed in Table 1 and
Table 2, respectively.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel, contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
A01.05 on Steel Reinforcement. the ASTM website.
3
Current edition approved Sept. 1, 2018. Published September 2018. Originally Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
approved in 1975. Last previous edition approved in 2015 as A722/A722M–15. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
DOI: 10.1520/A0722_A0722M-18. www.dodssp.daps.mil.
*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

---------------------- Page: 1 ----------------------
A722/A722M − 18
TABLE 1 Nominal Dimensions for Type I (Plain) Bars
tions A370; however, in the extension under load method, the
A
Nominal Diameter Nominal Weight (Mass) Nominal Area total strain shall be 0.7 %, and in the offset method the offset
2 2
in. mm lb/ft kg/m in. mm shall be 0.2 %.
3
⁄4 19 1.50 2.23 0.44 284
6.4 The minimum elongation after rupture shall be
...

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: A722/A722M − 15 A722/A722M − 18
Standard Specification for
1
High-Strength Steel Bars for Prestressed Concrete
This standard is issued under the fixed designation A722/A722M; 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.
1. Scope*
1.1 This specification covers Type I and Type II high-strength steel bars intended for use in prestressed concrete construction
or in prestressed ground anchors. Type I bars have a plain surface. Type II bars have surface deformations. Bars are of a minimum
tensile strength level of 150 000 psi [1035 MPa].
1.2 A supplementary requirement (S1) is provided for use where bend tests of bars are required by the purchaser. The
supplementary requirement applies only when specified in the purchase order.
1.3 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.
1.4 This specification is applicable for orders in either inch-pound units (as Specification A722) or in SI units (as Specification
A722M).
1.5 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 non-conformance with the specification.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
3
2.2 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
3
2.3 U.S. Federal Standard:
Fed. Std. 123 Marking for Shipment (Civil Agencies)
3. Ordering Information
3.1 Orders for high-strength steel bars under this specification shall contain the following information:
3.1.1 Quantity,
3.1.2 Size and length,
3.1.3 Type I or Type II, and
3.1.4 ASTM designation A722 [A722M] and year-date of issue.
3.2 The purchaser shall have the option to specify additional requirements, including but not limited, to the following:
3.2.1 Report on chemical composition (5.1),
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 April 15, 2015Sept. 1, 2018. Published April 2015September 2018. Originally approved in 1975. Last previous edition approved in 20122015
as A722/A722M – 12.A722/A722M – 15. DOI: 10.1520/A0722_A0722M-15.10.1520/A0722_A0722M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
*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

---------------------- Page: 1 ----------------------
A722/A722M − 18
3.2.2 Special inspection requirements (14.2),
3.2.3 Load-elongation curve (16.2),
3.2.4 Special preparation for delivery, if desired (see Section 17), and
3.2.5 Supplementary requirement (S1).
4. Materials and Manufacture
4.1 The bars shall be rolled from properly identified heats of mold-cast or strand-cast steel. The standard sizes and dimensions
of Type I and II bars shall be those listed in Table 1 and Table 2, respectively.
4.2 The bars shall be subjected to cold-stressing to not less than 80 % of the minimum tensile st
...