ASTM B498/B498M-22

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Designation: B498/B498M − 19 B498/B498M − 22
Standard Specification for
Zinc-Coated (Galvanized) Steel Core Wire for Use in
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Overhead Electrical Conductors
This standard is issued under the fixed designation B498/B498M; 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 round, zinc-coated, steel core wire with two classes of zinc coating for use in overhead electrical
conductors.
1.2 This specification covers wire of diameter from 0.0500 to 0.1900 in. or 1.27 to 4.82 mm, inclusive.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.
1.4 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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein.
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2.2 ASTM Standards:
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods and Practices for Chemical Analysis of Steel Products
B6 Specification for Zinc
B193 Test Method for Resistivity of Electrical Conductor Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3. Terminology
3.1 Definitions:
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This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on Conductors
of Ferrous Metals.
Current edition approved March 1, 2019Oct. 1, 2022. Published April 2019October 2022. Originally published as B498 – 69 to replace B245 and B261. Last previous
edition approved in 20162019 as B498/B498M – 08 (2016).B498/B498M – 19. DOI: 10.1520/B0498_B0498M-19.10.1520/B0498_B0498M-22.
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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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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B498/B498M − 22
3.1.1 lot—unless otherwise specified in the contract or order, a lot shall consist of all coils of wire of the same diameter and unit
lengths submitted for inspection at the same time.
3.1.2 product code—Definesdefines product coating type, coating class and strength grade. Twograde; two product codes for
product produced to this specification: Class A Zinc Coated (Code GA2); and Class C Zinc Coated (Code GC2).
4. Classification
4.1 The wire is furnished in two classes of coating, Class A or Class C, as specified, in conformance with the requirements of
Section 10 and Table 6 or Table 7.
5. Ordering Information
5.1 Orders for material under this specification shall include the following information:
5.1.1 Quantity of each size,
5.1.2 Wire diameter in inches or millimeters (Section 14),
5.1.3 Product Codecode (see 3.1.2 and 4.1),
5.1.4 Certification, if required (Section 19),
5.1.5 Test report, if required (Section 19), and
5.1.6 Package size (Section 20).
5.1.7 Order Example—Order Example: Five multiple lengths of 12 000 ft.ft each, 0.1327 in. GA2 wire, packaged onto wooden
nonreturnable reels, with certified test report.
6. Materials and Manufacture
6.1 The base metal shall be steel produced by the open-hearth, electric-furnace, or basic-oxygen process.
6.2 The wire shall be cold drawn and coated with zinc to produce the desired properties.
6.3 The slab zinc used for coating shall be high-grade or better, conforming to Specification B6.
7. Chemical Composition
7.1 The steel shall conform to the requirements prescribed in Table 1.
7.2 Chemical analys
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