ASTM A881/A881M-10
(Specification)Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete Railroad Ties
Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete Railroad Ties
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 uncoated, indented, low-relaxation steel wire for use as prestressing tendons in concrete railroad ties.
1.2 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.
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Designation:A881/A881M −10
StandardSpecification for
Steel Wire, Indented, Low-Relaxation for Prestressed
1
Concrete Railroad Ties
This standard is issued under the fixed designationA881/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* 3.1.1 indented steel wire for railroad ties, n—indented,
cold-drawn, uncoated, low-relaxation wire intended for use as
1.1 This specification covers uncoated, indented, low-
prestressing tendons in concrete railroad ties, the wire surface
relaxation steel wire for use as prestressing tendons in concrete
having indentations that reduce longitudinal movement of the
railroad ties.
wire while also providing consistent prestress transfer length.
1.2 The values stated in either inch-pound units or SI units
3.1.2 low-relaxation wire, n—indented cold-drawn wire,
are to be regarded separately as standard. Within the text, the
straightened, that receives a suitable continuous thermo-
SI units are shown in brackets. The values stated in each
mechanical treatment as the last operation to produce the
system may not be exact equivalents; therefore, each system
properties listed.
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the
4. Ordering Information
standard.
4.1 It shall be the responsibility of the purchaser to specify
all requirements that are necessary for material ordered to this
2. Referenced Documents
specification. Such requirements shall include, but are not
2
2.1 ASTM Standards:
limited to, the following:
A370 Test Methods and Definitions for Mechanical Testing
4.1.1 Quantity (weight [mass]),
of Steel Products
4.1.2 Name of material (indented, low-relaxation steel wire
A421/A421M Specification for Uncoated Stress-Relieved
for prestressed concrete railroad ties),
Steel Wire for Prestressed Concrete
4.1.3 Required minimum tensile strength (see Table 1),
A700 Practices for Packaging, Marking, and Loading Meth-
4.1.4 Nominal diameter,
3
ods for Steel Products for Shipment (Withdrawn 2014)
4.1.5 Packaging,
E328 Test Methods for Stress Relaxation for Materials and
4.1.6 ASTM designation and year of issue, and
Structures
4.1.7 Special requirements (such as, indentation sidewall
4
2.2 U.S. Military Standards:
angle or outside inspection), if any.
MIL-STD-129 Marking for Shipment and Storage
4
2.3 U.S. Federal Standard:
5. Materials and Manufacture
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
5.1 The steel shall be made by the electric-arc furnace,
basic-oxygen, or open-hearth process.
3. Terminology
5.2 The base metal shall be carbon steel of such quality that
3.1 Definitions of Terms Specific to This Standard:
when drawn to wire, indented, and then thermo-mechanically
treated, shall have the properties and characteristics prescribed
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
in this specification.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
6. Mechanical Property Requirements
Current edition approved Dec. 1, 2010. Published January 2011. Originally
approved in 1990. Last previous edition approved in 2005 as A881/A881M – 05.
6.1 General—Indented wire shall be supplied in coils,
DOI: 10.1520/A0881_A0881M-10.
2
packs, or spools to the specified mechanical properties in Table
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1. It shall be permissible to furnish diameters of wire not
Standards volume information, refer to the standard’s Document Summary page on
specifically itemized in this specification, provided that the
the ASTM website.
3 strength is defined and they conform otherwise to the require-
The last approved version of this historical standard is referenced on
www.astm.org. ments of this specification.
4
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
6.2 Tensile Strength—The minimum tensile strength of the
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
dodssp.daps.dla.mil. indented wire shall conform to the requirements of Table 1.
*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−10
TABLE 1 Tensile Strength Requirements
outside of the bend. The wire shall be bent at a uniform rate,
Nominal Weight with the duration of test to be between 10 and 3
...
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–05 Designation: A881/A881M – 10
Standard Specification for
Steel Wire, Deformed, Stress-Relieved orIndented, Low-
1
Relaxation for Prestressed Concrete Railroad Ties
This standard is issued under the fixed designationA881/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 uncoated, deformed, stress-relieved, and stress-relieved indented, low-relaxation steel wire for use
as prestressedprestressing tendons in concrete railroad ties.
1.2 The values stated in either- inch-pound units or SI units are to be regarded separately as standard. Within the text, the
inch-poundSIunitsareshowninparentheses.brackets.Thevaluesstatedineachsystemaremaynotbeexactequivalents;therefore,
each system mustshall be used independently of the other. Combining values forfrom the two systems may result in
non-conformance with the specification. standard.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A421/A421M Specification for Uncoated Stress-Relieved Steel Wire for Prestressed Concrete Specification for Uncoated
Stress-Relieved Steel Wire for Prestressed Concrete
A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment
E328 Test Methods for Stress Relaxation for Materials and Structures
3
2.2 U.S. Military Standards:
MIL-STD-129Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products, Preparation for Shipment and Storage Marking for Shipment and Storage
3
2.3 U.S. Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 deformedindented steel wire for railroad ties, n—a deformed, uncoated steel stress-relieved or low-relaxation wire
intended for use as reinforcement in prestressed concrete railroad ties, the wire surface having deformations that reduce
longitudinal movement of the wire in such construction, and conform to the provisions of Section 7. —indented, cold-drawn,
uncoated, low-relaxation wire intended for use as prestressing tendons in concrete railroad ties, the wire surface having
indentations that reduce longitudinal movement of the wire while also providing consistent prestress transfer length.
3.1.2 low-relaxation wire, n—indented cold-drawn wire, straightened, that receives a suitable continuous thermo-mechanical
treatment as the last operation to produce the properties listed.
3.1.3stress-relieved wire, n—indented cold-drawn wire, straightened, that receives a suitable continuous thermal treatment as a
last operation to produce the properties listed.
4. Ordering Information
4.1It4.1 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:
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 May 1, 2005. Published May 2005. Originally approved in 1990 . Last previous edition approved in 2002 as A881/A881M– 02. DOI:
10.1520/A0881_A0881M-05.
Current edition approved Dec. 1, 2010. Published January 2011. Originally approved in 1990. Last previous edition approved in 2005 as A881/A881M – 05. DOI:
10.1520/A0881_A0881M-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. 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 19111-50948, 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 – 10
4.1.1 Quantity (mass [weight]),(weight [mass]),
4.1.2 Name of material (deformed steel stress-relieved or (indented, low-relaxation steel wire for prestressed concrete railroad
ties),
4.1.3Grade4.1.3 Req
...
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