ASTM B498/B498M-98
(Specification)Standard Specification for Zinc-Coated (Galvanized) Steel Core Wire for Aluminum Conductors, Steel Reinforced (ACSR)
Standard Specification for Zinc-Coated (Galvanized) Steel Core Wire for Aluminum Conductors, Steel Reinforced (ACSR)
SCOPE
1.1 This specification covers round, zinc-coated, steel core wire with three classes of zinc coating used for mechanical reinforcement in the manufacture of aluminum conductors, steel-reinforced (ACSR).
1.2 This specification covers wire of diameter from 0.0500 to 0.1900 in. inclusive.
1.3 The values stated in inch-pound units are to be regarded as the standard, with the exception of resistivity. The values given in parentheses are for information only.
General Information
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Standards Content (Sample)
Designation: B 498/B 498M – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Zinc-Coated (Galvanized) Steel Core Wire for Aluminum
Conductors, Steel Reinforced (ACSR)
This standard is issued under the fixed designation B 498/B 498M; 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 4. Classification
1.1 This specification covers round, zinc-coated, steel core 4.1 The wire is furnished in three classes of coating, Class
wire with three classes of zinc coating used for mechanical A, Class B, or Class C, as specified, in conformance with the
reinforcement in the manufacture of aluminum conductors, requirements of Section 10 and Table 1 or Table 2.
steel-reinforced (ACSR).
5. Ordering Information
1.2 This specification covers wire of diameter from 0.0500
5.1 Orders for material under this specification shall include
to 0.1900 in. or 1.60 to 4.80 mm, inclusive.
1.3 The values stated in inch-pound units or SI units are to the following information:
5.1.1 Quantity of each size,
be regarded separately as standard. The values in each system
are not exact equivalents; therefore, each system shall be used 5.1.2 Wire diameter in inches or millimetres (Section 14),
5.1.3 Class of coating (see 4.1),
independently of the other. Combining values from the two
systems may result in nonconformance with this specification. 5.1.4 Certification, if required (Section 19),
5.1.5 Test report, if required (Section 19), and
2. Referenced Documents
5.1.6 Package size (Section 20).
2.1 The following documents of the issue in effect on date
6. Materials and Manufacture
of material purchase form a part of this specification to the
extent referenced herein. 6.1 The base metal shall be steel produced by the open-
hearth, electric-furnace, or basic-oxygen process.
2.2 ASTM Standards:
A 90/A 90M Test Method for Weight [Mass] of Coating on 6.2 The wire shall be cold drawn and coated with zinc to
produce the desired properties.
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A 370 Test Methods and Definitions for Mechanical Testing 6.3 The slab zinc used for coating shall be high-grade or
better, conforming to Specification B 6.
of Steel Products
A 751 Test Methods, Practices, and Terminology for
3 7. Chemical Composition
Chemical Analysis of Steel Products
7.1 The steel shall conform to the requirements prescribed
B 6 Specification for Zinc
in Table 3.
B 193 Test Method for Resistivity of Electrical Conductor
7.2 Chemical analysis shall be conducted in accordance
Materials
with Test Methods A 751.
3. Terminology
8. Tensile Test
3.1 Definition:
8.1 The zinc-coated steel core wire shall conform to the
3.1.1 lot—unless otherwise specified in the contract or
tensile and elongation requirements prescribed in Table 4 and
order, a lot shall consist of all coils of wire of the same
Table 5.
diameter and unit lengths submitted for inspection at the same
8.2 Tensile tests shall be conducted in accordance with Test
time.
Methods A 370, using the initial settings for determining stress
at 1 % extension given in Table 6 or Table 7 of this specifica-
This specification is under the jurisdiction of ASTM Committee B-1 on
tion.
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
Conductors of Ferrous Metals.
8.3 Test Specimens—The test specimens shall be free of
Current edition approved Sept. 10, 1998. Published November 1998. Originally
bends or kinks other than the curvature resulting from the usual
published as B 498 – 69 to replace B 245 and B 261. Last previous edition
coiling operations. Any hand straightening necessary to permit
B 498 – 93.
insertion of the specimen in the jaws of the testing machine
Annual Book of ASTM Standards, Vol 01.06.
Annual Book of ASTM Standards, Vol 01.03.
shall be performed by drawing between wood blocks or by
Annual Book of ASTM Standards, Vol 02.04.
some other equally satisfactory means.
Annual Book of ASTM Standards, Vol 02.03.
B 498/B 498M
TABLE 1 Zinc Coating
12.2 Joints may be made at any stage of processing before
Area Density of Coating, min, oz/ft of final cold drawing by the electric butt-weld or flash-welding
Specified Diameter of Coated
Uncoated Wire Surface
process.
Wire, in.
Class A Class B Class C
12.3 Welding equipment and procedure shall be such that it
can be demonstrated that the tensile strength of a finished wire
0.0500 to 0.599, incl 0.60 1.20 1.80
0.0600 to 0.0749, incl 0.65 1.30 1.95
specimen containing the welded section shall not be less than
0.0750 to 0.0899, incl 0.70 1.40 2.10
96 % of the specified minimum stress at 1 % extension.
0.0900 to 0.1039, incl 0.75 1.50 2.25
0.1040 to 0.1199, incl 0.80 1.60 2.40 12.4 A welded section shall not be required to meet the
0.1200 to 0.1399, incl 0.85 1.70 2.55
stress at 1 % extension, elongation, and wrap tests.
0.1400 to 0.1799, incl 0.90 1.80 2.70
0.1800 to 0.1900, incl 1.00 2.00 3.00
13. Density and Resistivity
13.1 For the purposes of calculating mass per unit length,
TABLE 2 Zinc Coating
cross-sections, and so forth, the density of galvanized steel
3 3
Area Density of Coating, min, g/m of
wire at 20°C shall be taken as 0.281 lb/in. (7780 kg/m ).
Specified Diameter of Coated
Uncoated Wire Surface
13.2 A maximum resistivity of galvanized steel wire is not
Wire, mm
Class A Class B Class C 2
guaranteed, but a typical value of 0.191 57 V·mm /m may be
1.60 to 1.90, incl 210 420 630
used for purposes of calculation. For conversion to other units
Over 1.90 to 2.30, incl 220 440 660
of conductivity or resistivity, refer to Test Method B 193.
Over 2.30 to 2.70, incl 230 460 690
Over 2.70 to 3.10, incl 240 480 720
Over 3.10 to 3.50, incl 260 520 780 14. Dimensions and Permissible Variations
Over 3.50 to 3.90, incl 270 540 810
14.1 The specified diameter shall be expressed in decimal
Over 3.90 to 4.50, incl 275 550 825
Over 4.50 to 4.80, incl 300 600 900 fractions of an inch to four decimal places or in millimetres and
decimal fractions of a millimetre to two decimal places.
14.2 For diameter measurements and diameter tolerances,
TABLE 3 Chemical Requirements
specified diameters shall be rounded to the closest 0.0005 in. or
Element Composition, %
0.01 mm.
Carbon 0.50 to 0.85
14.3 Determine the greatest and least diameters each to the
Manganese 0.50 to 1.10
neareast 0.001 in. or 0.01 mm, at the same cross-section. The
Phosphorus, max 0.035
Sulfur, max 0.045
average of these two diameters shall not differ from the
Silicon 0.10 to 0.35
specified diameter by more than the tolerances shown in Table
10 and Table 11.
9. Wrap Test
15. Workmanship, Finish, and Appearance
9.1 The material, as represented by the test specimens, shall
15.1 The zinc coating shall be reasonably smooth, continu-
not fracture when the galvanized wire is wrapped at a rate not
ous, of reasonably uniform thickness, and free from imperfec-
exceeding 15 turns/min in a close helix of at least eight turns
tions not consistent with good commercial practice.
around a cylindrical mandrel with a diameter equal to two
times the specified diameter of the wire under test, 65%. 16. Number of Tests and Retests
16.1 One test specimen shall be taken from each 5000 lbs or
10. Coating Test
2500 kg. or fraction, thereof, in the inspection lot.
10.1 The material, as represented by the test specimens,
16.2 Each specimen shall be tested for compliance with
shall conform to the coating requirements of Table 1 or Table
Sections 8, 9, 11, and 14. At least half of the specimens shall
2. for the diameter and class of coating specified.
be tested for compliance with Section 10.
10.2 The coating test shall be conducted in accordance with
16.3 Sh
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