ASTM A821/A821M-21

Standard Specification for Steel Wire, Hard-Drawn for Prestressed Concrete Tanks

ABSTRACT
This specification covers uncoated, high-strength, hard-drawn steel wire for prestressed concrete tanks and similar structures. Steel samples shall be processed by either open-hearth, basic-oxygen, or electric furnace melting process. The wires shall be cold-drawn as well. Cast or heat analysis and product analysis shall be performed wherein the steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, and silicon. Steel specimens shall also undergo tensile tests, wrap tests, and torsion tests. Final products shall be marked by a tag.
SCOPE
1.1 This specification covers uncoated, high-strength, hard-drawn steel wire for use in the construction of prestressed concrete tanks and similar structures. In application, the wire is continuously wrapped on the structure maintaining tension by a device using a wire drawing die, or mechanical tensioning system without re-drawing.  
1.2 This specification is applicable only to the condition of the wire as delivered to the purchaser. It is not applicable to the properties or condition of the wire after application.  
1.2.1 Type A wire is to be tensioned by drawing through a wire drawing die or by a mechanical system without re-drawing.  
1.2.2 Type B wire is drawn to finished diameter by the manufacturer for tensioning by a mechanical system without re-drawing.  
Note 1: Type A wire, when tensioned by drawing through a die, may not function properly if the purchaser does not ensure that during application the surface of the wire is free of rust and foreign materials that can be detrimental to good wire drawing practice. Further, the purchaser should ensure that proper wire drawing techniques are followed, including adequate lubrication, cooling, and proper die mechanics.  
1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification.  
1.4 This specification is applicable for orders in either inch-pounds units (as Specification A821) or in SI units (as Specification A821M).  
1.5 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.  
1.6 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: 30-Apr-2021
• 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:A821/A821M −21
Standard Specification for
1
Steel Wire, Hard-Drawn for Prestressed Concrete Tanks
This standard is issued under the fixed designationA821/A821M; 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* 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers uncoated, high-strength, hard-
ization established in the Decision on Principles for the
drawn steel wire for use in the construction of prestressed
Development of International Standards, Guides and Recom-
concrete tanks and similar structures. In application, the wire is
mendations issued by the World Trade Organization Technical
continuously wrapped on the structure maintaining tension by
Barriers to Trade (TBT) Committee.
a device using a wire drawing die, or mechanical tensioning
system without re-drawing.
2. Referenced Documents
1.2 This specification is applicable only to the condition of
2
2.1 ASTM Standards:
the wire as delivered to the purchaser. It is not applicable to the
A370 Test Methods and Definitions for Mechanical Testing
properties or condition of the wire after application.
of Steel Products
1.2.1 Type A wire is to be tensioned by drawing through a
A510/A510M Specification for General Requirements for
wire drawing die or by a mechanical system without re-
Wire Rods and Coarse Round Wire, Carbon Steel, and
drawing.
Alloy Steel
1.2.2 Type B wire is drawn to finished diameter by the
A938 Test Method for Torsion Testing of Wire
manufacturer for tensioning by a mechanical system without
E29 Practice for Using Significant Digits in Test Data to
re-drawing.
Determine Conformance with Specifications
3
NOTE 1—Type A wire, when tensioned by drawing through a die, may
2.2 Military Standard:
not function properly if the purchaser does not ensure that during
MIL-STD-129 Military Marking for Shipment and Storage
application the surface of the wire is free of rust and foreign materials that
3
2.3 Federal Standard:
can be detrimental to good wire drawing practice. Further, the purchaser
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
should ensure that proper wire drawing techniques are followed, including
adequate lubrication, cooling, and proper die mechanics.
3. Ordering Information
1.3 The text of this specification references notes and
footnotes which provide explanatory material. These notes and
3.1 Ordersforhard-drawnsteelwireunderthisspecification
footnotes (excluding those in tables) shall not be considered as
shall contain the following information:
requirements of the specification. 3.1.1 Quantity (lb [kg]),
3.1.2 Wire diameter (inches [millimetres]),
1.4 This specification is applicable for orders in either
3.1.3 Type A wire or Type B wire, and
inch-pounds units (as Specification A821) or in SI units (as
3.1.4 ASTM designation A821 [A821M] and year of issue.
Specification A821M).
3.2 Thepurchasershallhavetheoptiontospecifyadditional
1.5 The values stated in either inch-pound units or SI units
requirements, including but not limited to, the following:
are to be regarded separately as standard. Within the text, the
3.2.1 Special wire diameters (7.2)
SI units are shown in brackets. The values stated in each
3.2.2 Pre-lubrication of Type A wire (8.6)
system may not be exact equivalents; therefore, each system
3.2.3 Number of tests (9.2.1)
shall be used independently of the other. Combining values
3.2.4 Requirements for inspection (10.1),
from the two systems may result in non-conformance with the
3.2.5 Certification (12.1),
specification.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Stainless Steel and Related Alloys 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 May 1, 2021. Published May 2021. Originally Available from U.S. Government Printing Office, Superintendent of
approved in 1984. Last previous edition approved in 2015 as A821/A821M – 15. Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
DOI: 10.1520/A0821_A0821M-21. www.access.gpo.gov.
*A Summary of Changes section appears at the end of this standard
Copyrig
...

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: A821/A821M − 15 A821/A821M − 21
Standard Specification for
1
Steel Wire, Hard-Drawn for Prestressed Concrete Tanks
This standard is issued under the fixed designation A821/A821M; 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 uncoated, high-strength, hard-drawn steel wire for use in the construction of prestressed concrete
tanks and similar structures. In application, the wire is continuously wrapped on the structure maintaining tension by a device using
a wire drawing die, or mechanical tensioning system without re-drawing.
1.2 This specification is applicable only to the condition of the wire as delivered to the purchaser. It is not applicable to the
properties or condition of the wire after application.
1.2.1 Type A wire is to be tensioned by drawing through a wire drawing die or by a mechanical system without re-drawing.
1.2.2 Type B wire is drawn to finished sizediameter by the manufacturer for tensioning by a mechanical system without
re-drawing.
NOTE 1—Type A wire, when tensioned by drawing through a die, may not function properly if the purchaser does not ensure that during application the
surface of the wire is free of rust and foreign materials that can be detrimental to good wire drawing practice. Further, the purchaser should ensure that
proper wire drawing techniques are followed, including adequate lubrication, cooling, and proper die mechanics.
1.3 The text of this standardspecification references notes and footnotes which provide explanatory material. These notes and
footnotes (excluding those in tables and figures) tables) shall not be considered as requirements of the standard.specification.
1.4 This specification is applicable for orders in either inch-pounds units (as Specification A821) or in SI units (as Specification
A821M).
1.5 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 standard.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.
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 May 1, 2015May 1, 2021. Published May 2015May 2021. Originally approved in 1984. Last previous edition approved in 20102015 as
A821/A821M – 10.A821/A821M – 15. DOI: 10.1520/A0821_A0821M-15.10.1520/A0821_A0821M-21.
*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
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A821/A821M − 21
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A510A510/A510M Specification for General Requirements for Wire Rods and Coarse Round Wire, Carbon Steel (Metric)
A0510_A0510M Steel, and Alloy Steel
A700 Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment
A938 Test Method for Torsion Testing of Wire
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
2.2 Military Standard:
MIL-STD-129 Military Marking for Shipment and Storage
3
2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Ordering Information
3.1 It shall be the responsibility of the purchaser to specify all requirements that are necessary for material ordered to this
specification. Such requirements shall include, but are not limited to, the following:Orders for hard-drawn steel wire under this
specification shall contain the following information:
3.1.1 Quantity (weight) [mass], (lb [kg]),
3.1.2 Wire diameter (inches [millimetres]),
3.1.3
...