ASTM A881/A881M-99

Standard Specification for Steel Wire, Deformed, Stress-Relieved or Low-Relaxation for Prestressed Concrete Railroad Ties

SCOPE
1.1 This specification covers uncoated, deformed, stress-relieved, and stress-relieved low-relaxation wire for use as prestressed 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 are not exact equivalents; therefore, each system must be used independently of the other. Combining values for the two systems may result in non-conformance with the specification.

General Information

• Status: Historical
• Publication Date: 09-Sep-1999
• 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

• Replaced By: ASTM A881/A881M-02 - Standard Specification for Steel Wire, Deformed, Stress-Relieved or Low-Relaxation for Prestressed Concrete Railroad Ties
• Effective Date: 10-Sep-2002
• Referred By: ASTM A1096/A1096M-22 - Standard Test Method for Evaluating Bond of Individual Steel Wire, Indented or Plain, for Concrete Reinforcement
• Effective Date: 10-Sep-1999

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 881/A881M – 99
Standard Specification for
Steel Wire, Deformed, Stress-Relieved or Low-Relaxation for
Prestressed Concrete Railroad Ties
This standard is issued under the fixed designation A 881/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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 low-relaxation wire, n—indented cold-drawn wire,
straightened, that receives a suitable continuous thermo-
1.1 This specification covers uncoated, deformed, stress-
mechanical treatment as the last operation to produce the
relieved, and stress-relieved low-relaxation wire for use as
properties listed.
prestressed tendons in concrete railroad ties.
3.1.3 stress-relieved wire, n—indented cold-drawn wire,
1.2 The values stated in either-inch-pound units or SI units
straightened, that receives a suitable continuous thermal treat-
are to be regarded separately as standard. Within the text, the
ment as a last operation to produce the properties listed.
inch-pound units are shown in parentheses. The values stated
in each system are not exact equivalents; therefore, each
4. Ordering Information
system must be used independently of the other. Combining
4.1 Orders for deformed wire under this specification should
values for the two systems may result in non-conformance with
include the following information:
the specification.
4.1.1 Quantity (mass [weight]),
2. Referenced Documents 4.1.2 Name of material (deformed steel stress-relieved or
low-relaxation wire for prestressed concrete railroad ties),
2.1 ASTM Standards:
4.1.3 Grade (see Table 1),
A 370 Test Methods and Definitions for Mechanical Testing
2 4.1.4 Nominal diameter,
of Steel Products
4.1.5 Packaging,
A 421/A 421M Specification for Uncoated Stress-Relieved
4.1.6 Stress-relieved or low relaxation,
Steel Wire for Prestressed Concrete
4.1.7 ASTM designation and year of issue, and
2.2 U.S. Military Standards:
4.1.8 Special requirements, if any.
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products, Preparation for Ship-
NOTE 1—A typical ordering description is as follows: 23 000 kg (50
ment and Storage
000 lb) Grade 235, deformed stress-relieved steel wire for prestressed
concrete railroad ties. 5.03-mm (0.198-in.) diameter wire in approximately
2.3 U.S. Federal Standard:
550-kg (1200-lb) coils, ASTM A 881/A 881M-________.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
5. Materials and Manufacture
3. Terminology
5.1 The steel shall be made by the basic-oxygen, open-
3.1 Definitions of Terms Specific to This Standard:
hearth, or electric-furnace process.
3.1.1 deformed steel wire for railroad ties, n—a deformed,
5.2 The base metal shall be carbon steel of such quality that
uncoated steel stress-relieved or low-relaxation wire intended
when drawn and stress relieved, or thermo-mechanically
for use as reinforcement in prestressed concrete railroad ties,
treated at a suitable wire size, shall have the properties and
the wire surface having deformations that reduce longitudinal
characteristics prescribed in the specification.
movement of the wire in such construction, and conform to the
provisions of Section 7.
6. Mechanical Property Requirements
6.1 General—Deformed wire shall be supplied in coils to
This specification is under the jurisdiction of ASTM Committee A-1 on Steel, the specified mechanical properties in Table 1. Nominal
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
diameters of wire not specifically itemized in this specification
A01.05 on Steel Reinforcement.
may be employed providing that the strength is defined and
Current edition approved Sept. 10, 1999. Published December 1999. Originally
they conform otherwise to the requirements of this specifica-
published as A 881/A 881M– 90. Last previous edition A 881/A 881M – 98a.
Annual Book of ASTM Standards, Vol 01.03.
tion.
Annual Book of ASTM Standards, Vol 01.04.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
Robbins Ave., Philadelphia, PA 19111-5094.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 881/A881M – 99
TABLE 1 Breaking Strength Requirements
Nominal Mass
Wire Nominal Breaking Nominal (Weight), g/m
A
Grade Diameter Strength Area (lb/1000 ft)
2 2
mm (in.) kN (lbf) mm (in. )
1550 (225) 5.03 (0.198) 30.8 (6920) 19.86 (0.0308) 155.9 (104.8)
1620 (235) 5.03 (0.198) 32.2 (7230) 19.86 (0.0308) 155.9 (104.8)
1720 (250) 5.03 (0.198) 34.3 (7700) 19.86 (0.0308) 155.9 (104.8)
1790 (260) 5.5 (0.216) 42.6 (9570) 23.7 (0.0368) 187.4 (126.0)
A
The nominal cross-sectional area is based on the nominal diameter. The actual
2 2
area in mm (in. ) may be calculated by dividing the mass (weight) per linear
–6 3 3
millimetre (in.) of the specimen in kg (lb) by 7.850 3 10 kg/mm (mass of 1 mm
of steel) (0.2836 (weight of 1 in. of steel)). The amount of variation is dependent
on the shape and character of the deformations.
FIG. 1 Acceptable Type of Deformed Wire
6.2 Breaking Strength—The minimum breaking strength of
the deformed wire shall conform to the requirements of Table
TABLE 3 Dimensions of Deformations
1. Other values of breaking strength and nominal diameters can
be specified if shown by test that the strength exceeds that
NOTE 1—Depth of indent shall be the average depth of six or more
specified. The tension test shall be made in accordance with random indents measured at maximum depth.
Test Methods A 370.
Nominal Nominal Nominal
Wire Diameter, Depth, A, mm (in.) Length, L, Pitch, P,
6.3 Load at 1 % Extension—The load at 1 % extension shall
mm (in.) mm (in.) mm (in.)
be at least 85 % of the minimum specified breaking strength for
5.03 (0.198) 0.13 + 0.02, –0.05 3.5 (0.138) 5.5 (0.217)
stress relieved and 90 % for stress-relieved low-relaxation wire
(0.005 + 0.001, –0.002)
when tested in accordance with Test Methods A 370.
5.5 (0.216) 0.13 + 0.02, –0.05 3.5 (0.138) 5.5 (0.217)
6.4 Elongation—The percent elongation after fracture on a (0.005 + 0.001, –0.002)
250-mm (10-in.) gage length shall be 3.0 % minimum.
6.5 Bend Test—The deformed wire shall withstand being
bent through 90° without cracking on the outside of the bent
8. Permissible Variation in Di
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