ASTM A881/A881M-23

Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete

ABSTRACT
This specification covers uncoated, deformed, stress-relieved, and low-relaxation wire for use as prestressed tendons in concrete railroad ties. Deformed wires with nominal diameters shall be supplied in coils and shall conform to specified values of breaking strength requirements. The relaxation losses of normal stress-relieved and low-relaxation stress-relieved wires should not exceed the specified limits. The two acceptable types of deformed wire shall have specific dimensions of deformations, where the depth of indent shall be the average depth of six or more random indents measured at maximum depth. The material shall be tested on and shall conform to specified values of the following mechanical properties: breaking strength, load at 1% extension, elongation, bending, and relaxation.
SCOPE
1.1 This specification covers indented, low-relaxation steel wire for use in prestressed concrete.  
1.2 The text of this specification contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes do not contain any mandatory information.  
1.3 This specification is applicable for orders in either inch-pound units (as Specification A881) or in SI units (as Specification A881M).  
1.4 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.  
1.5 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-2023
• ICS: 77.140.15 - Steels for reinforcement of concrete
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

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: A881/A881M − 23
Standard Specification for
Steel Wire, Indented, Low-Relaxation for Prestressed
1
Concrete
This standard is issued under the fixed designation A881/A881M; 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* A1096/A1096M Test Method for Evaluating Bond of Indi-
vidual Steel Wire, Indented or Plain, for Concrete Rein-
1.1 This specification covers indented, low-relaxation steel
forcement
wire for use in prestressed concrete.
3
2.2 U.S. Military Standard:
1.2 The text of this specification contains notes or footnotes,
MIL-STD-129 Marking for Shipment and Storage
3
or both, that provide explanatory material. Such notes and
2.3 U.S. Federal Standard:
footnotes do not contain any mandatory information.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.3 This specification is applicable for orders in either
3. Terminology
inch-pound units (as Specification A881) or in SI units (as
Specification A881M). 3.1 Definitions of Terms Specific to This Specification:
3.1.1 indented steel wire, n—indented, cold-drawn, low-
1.4 The values stated in either inch-pound units or SI units
relaxation wire, the wire surface having indentations that
are to be regarded separately as standard. Within the text, the
reduce longitudinal movement of the wire while also providing
SI units are shown in brackets. The values stated in each
consistent prestress transfer length.
system may not be exact equivalents; therefore, each system
3.1.2 lot, n—all of the coils, packs, or spools of wire of the
shall be used independently of the other. Combining values
same nominal wire diameter contained in an individual ship-
from the two systems may result in non-conformance with the
ping release or shipping order.
specification.
3.1.3 low-relaxation wire, n—straightened wire that re-
1.5 This international standard was developed in accor-
ceives a suitable continuous thermo-mechanical treatment as
dance with internationally recognized principles on standard-
the last operation to produce the properties listed.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Ordering Information
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 4.1 Orders for indented low-relaxation steel wire for pre-
stressed concrete shall include the following necessary infor-
2. Referenced Documents
mation:
2
4.1.1 Quantity (weight [mass]),
2.1 ASTM Standards:
4.1.2 Required minimum tensile strength (6.2),
A370 Test Methods and Definitions for Mechanical Testing
4.1.3 Nominal diameter (6.1),
of Steel Products
4.1.4 Packaging, and
A421/A421M Specification for Stress-Relieved Steel Wire
4.1.5 ASTM designation and year of issue.
for Prestressed Concrete
A700 Guide for Packaging, Marking, and Loading Methods
4.2 The purchaser shall have the option to specify additional
for Steel Products for Shipment
requirements, including but not limited to, the following:
4.2.1 Indentation geometry (7.2, 7.3),
4.2.2 Indentation sidewall angle (7.3, 7.4),
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
4.2.3 Welding of rod prior to cold drawing permissible
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
(9.3),
A01.05 on Steel Reinforcement.
4.2.4 Outside inspection (11.1),
Current edition approved Sept. 1, 2023. Published September 2023. Originally
approved in 1990. Last previous edition approved in 2016 as A881/A881M – 16a. 4.2.5 Special packaging (14.1, 14.2), and
DOI: 10.1520/A0881_A0881M-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. dodssp.daps.dla.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 ----------------------
A881/A881M − 23
4.2.6 Other special requirements, if any. of Specification A421/A421M. The relaxation losses are not to
exceed 3.5 % after 1000 h when tested at an initial load of
5. Materials and Manufa
...

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: A881/A881M − 16a A881/A881M − 23
Standard Specification for
Steel Wire, Indented, Low-Relaxation for Prestressed
1
Concrete
This standard is issued under the fixed designation A881/A881M; 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 indented, low-relaxation steel wire for use in prestressed concrete.
1.2 The text of this specification contains notes or footnotes, or both, that provide explanatory material. Such notes and footnotes
do not contain any mandatory information.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A881) or in SI units (as Specification
A881M).
1.4 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.
1.5 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
A421/A421M Specification for Stress-Relieved Steel Wire for Prestressed Concrete
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A1096/A1096M Test Method for Evaluating Bond of Individual Steel Wire, Indented or Plain, for Concrete Reinforcement
3
2.2 U.S. Military Standard:
MIL-STD-129 Marking for Shipment and Storage
3
2.3 U.S. Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
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 Dec. 1, 2016Sept. 1, 2023. Published January 2017September 2023. Originally approved in 1990. Last previous edition approved in 2016 as
A881/A881M – 16.A881/A881M – 16a. DOI: 10.1520/A0881_A0881M-16A.10.1520/A0881_A0881M-23.
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://dodssp.daps.dla.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 ----------------------
A881/A881M − 23
3. Terminology
3.1 Definitions of Terms Specific to This Specification:
3.1.1 indented steel wire, n—indented, cold-drawn, low-relaxation wire, the wire surface having indentations that reduce
longitudinal movement of the wire while also providing consistent prestress transfer length.
3.1.2 lot, n—all of the coils, packs, or spools of wire of the same nominal wire diameter contained in an individual shipping release
or shipping order.
3.1.3 low-relaxation wire, n—straightened wire that receives a suitable continuous thermo-mechanical treatment as the last
operation to produce the properties listed.
4. Ordering Information
4.1 Orders for indented low-relaxation steel wire for prestressed concrete shall include the following necessary information:
4.1.1 Quantity (weight [mass]),
4.1.2 Required minimum tensile strength (6.2),
4.1.3 Nominal diameter (6.1),
4.1.4 Packaging, and
4.1.5 ASTM designation and year of issue.
4.2 The purchaser shall have the option to specify additional requirements, including but not limited to, the following:
4.2.1 Indentation geometry (7.2, 7.3),
4.2.2 Indentation sidewall angle (7.3, 7.4),
4.2.3 Welding of rod prior to cold drawing permissible (9.3),
4.2.4 Outside inspection (11.1),
4.2.5 Special packaging (14.1, 14.2), and
4.
...