ASTM A421/A421M-05

Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete

ABSTRACT
This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction. These two types are the type BA used for applications in which cold-end deformation is used for anchoring purposes and type WA wire which is used for application in which the ends are anchored by wedges, no cold-end deformation of the wire is involved. Required tensile strength, yield strength and elongation shall be evaluated using stress-relaxation test. Heat analysis shall be used to determine the percentage of specified elements especially sulfur and phosphorus to meet the required chemical composition.
SCOPE
1.1 This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed linear concrete construction, as follows:
1.1.1 Type BA wire is used for applications in which cold-end deformation is used for anchoring purposes (Button Anchorage), and
1.1.2 Type WA wire is used for application in which the ends are anchored by wedges, and no cold-end deformation of the wire is involved (Wedge Anchorage).
1.2 Supplement I describes low relaxation wire and relaxation testing for that product.
1.3 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other, without combining values in any way.

General Information

• Status: Historical
• Publication Date: 28-Feb-2005
• ICS: 77.140.15 - Steels for reinforcement of concrete
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.05 - Steel Reinforcement

Relations

• Replaces: ASTM A421/A421M-02 - Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete
• Effective Date: 01-Mar-2005
• Replaced By: ASTM A421/A421M-10 - Standard Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete
• Effective Date: 01-Nov-2010
• Referred By: ASTM C935-19 - Standard Specification for General Requirements for Prestressed Concrete Poles Statically Cast
• Effective Date: 01-Mar-2005
• Referred By: ASTM C1804-20 - Standard Specification for Spun Cast Prestressed Concrete Bases for Tapered Steel Lighting Poles
• Effective Date: 01-Mar-2005
• Referred By: ASTM A881/A881M-23 - Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete
• Effective Date: 01-Mar-2005
• Referred By: ASTM C913-21 - Standard Specification for Precast Concrete Water and Wastewater Structures
• Effective Date: 01-Mar-2005
• Referred By: ASTM C1089-19 - Standard Specification for Spun Cast Prestressed Concrete Poles
• Effective Date: 01-Mar-2005
• Referred By: ASTM C825-19 - Standard Specification for Precast Concrete Barriers
• Effective Date: 01-Mar-2005
• Referred By: ASTM A1096/A1096M-22 - Standard Test Method for Evaluating Bond of Individual Steel Wire, Indented or Plain, for Concrete Reinforcement
• Effective Date: 01-Mar-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
American Association State
Designation: A421/A421M – 05 Highway and Transportation Officials Standard
AASHTO No.: M 204
Standard Specification for
Uncoated Stress-Relieved Steel Wire for Prestressed
1
Concrete
This standard is issued under the fixed designationA421/A421M; 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 Department of Defense.
1. Scope* MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products, Preparation for Ship-
1.1 This specification covers two types of uncoated stress-
ment and Storage
relieved round high-carbon steel wire commonly used in
4
2.3 Federal Standard:
prestressed linear concrete construction, as follows:
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
1.1.1 Type BA wire is used for applications in which cold-
end deformation is used for anchoring purposes (Button
3. Ordering Information
Anchorage), and
3.1 It shall be the responsibility of the purchaser to specify
1.1.2 Type WA wire is used for application in which the
all requirements that are necessary for material ordered to this
ends are anchored by wedges, and no cold-end deformation of
specification. Such requirements shall include, but are not
the wire is involved (Wedge Anchorage).
limited to, the following:
1.2 Supplement I describes low relaxation wire and relax-
3.1.1 Quantity (kg [lb]),
ation testing for that product.
3.1.2 Diameter,
1.3 The values stated in either inch-pound or SI units are to
3.1.3 Type of anchorage (BA or WA),
be regarded separately as standard. Within the text, the
3.1.4 Packaging,
inch-pound units are shown in parentheses. The values stated
3.1.5 ASTM designation and date of issue, and
in each system may not be exact equivalents; therefore, each
3.1.6 Special requirements, if any.
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
NOTE 1—A typical ordering description is as follows: 10 000 kg of
with the standard. 6.35-mmdiameterwire,TypeBAinapproximately450kg1.5-mdiameter
coils to ASTM A421/A421M– _______(22 000 lb 0.250-in. diameter
2. Referenced Documents wire, Type BA in approximately 1000 lb 60-in. diameter coils to ASTM
2 A421/A421M–_______).
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing
4. Manufacture
of Steel Products
4.1 Process—The steel shall be made by the basic-oxygen,
E30 Test Methods for Chemical Analysis of Steel, Cast
open-hearth, or electric-furnace process.
3
Iron, Open-Hearth Iron, and Wrought Iron
4.2 Internal Soundness—A sufficient discard shall be made
E328 Test Methods for Stress Relaxation for Materials and
to ensure freedom from injurious piping and undue segrega-
Structures
tion.
4
2.2 Military Standards:
4.3 Wire—The wire shall be cold-drawn to size and suitably
stress relieved after cold drawing by a continuous heat treat-
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
ment to produce the prescribed mechanical properties.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
5. Physical Requirements
Current edition approved March 1, 2005. Published March 2005. Originally
5.1 Tensile Strength—The tensile strength of Type BA wire
approved in 1958. Last previous edition approved in 2002 as A421/A421M – 02.
DOI: 10.1520/A0421_A0421M-05.
and Type WA wire shall conform to the requirements pre-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
scribed in Table 1, and shall be determined as prescribed in
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Test Methods and Definitions A370, including Annex A4.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org.
4
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*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 ----------------------
A421/A421M – 05
TABLE 1 Tensile Strength Requirements
7.2 Type BA Wire—Type BA wire shall be of suitable
Tensile Strength, min, MPa (psi) quality to permit cold forming of buttons for anchorage.
Nominal Diameter, mm
(in.) Splitting shall not be considered a cause for rejection if the
Type BA T
...

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.
American Association State
Designation:A421/A421M–02 Designation: A 421/A 421M – 05 Highway and Transportation Officials Standard
AASHTO No.: M 204
Standard Specification for
Uncoated Stress-Relieved Steel Wire for Prestressed
1
Concrete
This standard is issued under the fixed designationA 421/A 421M; 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 Department of Defense.
1. Scope*
1.1 This specification covers two types of uncoated stress-relieved round high-carbon steel wire commonly used in prestressed
linear concrete construction, as follows:
1.1.1 Type BA wire is used for applications in which cold-end deformation is used for anchoring purposes (ButtonAnchorage),
and
1.1.2 Type WA wire is used for application in which the ends are anchored by wedges, and no cold-end deformation of the wire
is involved (Wedge Anchorage).
1.2 Supplement I describes low relaxation wire and relaxation testing for that product.
1.3 The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the inch-pound units are
shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used
independently of the other, without combining values in any way.
2. Referenced Documents
2
2.1 ASTM Standards:
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
3
E30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron
E 328 Test Methods for Stess Relaxation Tests for Materials and Structures
2.2 Military Standards:
4
MIL-STD-129 Marking for Shipment and Storage
4
MIL-STD-163 Steel Mill Products, Preparation for Shipment and Storage
2.3 Federal Standard:
4
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
3. Ordering Information
3.1Orders for stress-relieved wire under this specification should include the following 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:
3.1.1 Quantity (kg [lb]),
3.1.2 Diameter,
3.1.3 Type of anchorage (BA or WA),
3.1.4 Packaging,
3.1.5 ASTM designation and date of issue, and
3.1.6 Special requirements, if any.
NOTE 1—A typical ordering description is as follows: 10 000 kg of 6.35-mm diameter wire, Type BA in approximately 450 kg 1.5-m diameter coils
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys, and is the direct responsibility of SubcommitteeA01.05
on Steel Reinforcement.
Current edition approved Sept. 10, 2002. Published June 2003. Originally published as A421–58T. Last previous edition A421–98a.
Current edition approved March 1, 2005. Published March 2005. Originally approved in 1958. Last previous edition approved in 2002 as A 421/A 421M – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. ForAnnualBookofASTMStandards
, Vol 01.03.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Discontinued. See 1995 Annual Book of ASTM Standards , Vol 03.05.
3
Withdrawn.
4
Annual Book of ASTM Standards, Vol 03.01.
4
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*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 ----------------------
A 421/A 421M – 05
to ASTM A 421/A 421M– _______(22 000 lb 0.250-in. diameter wire, Type BA in approximately 1000 lb 60-in. diameter coils to ASTM
A 421/A 421M–_______).
4. Manufacture
4.1 Process—The steel shall be made by the basic-oxygen, open-hearth, or electric-furnace process.
4.2 Internal Soundness—A sufficient discard shall be made to ensure freedom from injurious piping and undue segregation.
4.3 Wire—The wire shall be cold-drawn to size and suitably stress relieved after cold drawing by a continuous heat treatment
to produce the prescribed mechanical properties.
5. Physical Requirements
5.1 Tensi
...