ASTM B500/B500M-24
(Specification)Standard Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors
Standard Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors
ABSTRACT
This specification covers zinc-coated (galvanized), zinc-aluminum-mischmetal alloy-coated, and aluminum-coated (aluminized) stranded steel wire core inserted for use in aluminum conductors, steel reinforced (ACSR). Prior to stranding, the metallic coated steel wire to be used in the production of the stranded core shall meet all of the requirements of the appropriate specification. Requirements for (1) coated steel wire joints, (2) stranding of the core such as lay length and lay direction, (3) construction of ACSR, and (4) tensile properties of stranded core are detailed. The standard stranded core lengths and methods of determining rated strength and calculating loads are given.
SCOPE
1.1 This specification covers 7-wire, 19-wire, 37-wire, and 61-wire zinc-coated (galvanized), zinc-5 % aluminum-mischmetal alloy-coated or aluminum clad stranded steel core intended for use in overhead electrical conductors.
1.2 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.
1.3 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.
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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.
Designation: B500/B500M − 24
Standard Specification for
Metallic Coated or Aluminum Clad Stranded Steel Core for
1
Use in Overhead Electrical Conductors
This standard is issued under the fixed designation B500/B500M; 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 B803/B803M Specification for High-Strength Zinc–5 %
Aluminum-Mischmetal Alloy-Coated Steel Core Wire for
1.1 This specification covers 7-wire, 19-wire, 37-wire, and
Use in Overhead Electrical Conductors
61-wire zinc-coated (galvanized), zinc-5 % aluminum-
B957/B957M Specification for Extra-High-Strength and
mischmetal alloy-coated or aluminum clad stranded steel core
Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core
intended for use in overhead electrical conductors.
Wire for Use in Overhead Electrical Conductors
1.2 The values stated in either SI units or inch-pound units
B958/B958M Specification for Extra-High-Strength and
are to be regarded separately as standard. The values stated in
Ultra-High-Strength Class A Zinc–5% Aluminum-
each system may not be exact equivalents; therefore, each
Mischmetal Alloy-Coated Steel Core Wire for Use in
system shall be used independently of the other. Combining
Overhead Electrical Conductors
values from the two systems may result in non-conformance
E83 Practice for Verification and Classification of Exten-
with the standard.
someter Systems
1.3 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions of Terms Specific to This Standard:
ization established in the Decision on Principles for the
3.1.1 lot, n—unless otherwise specified in the contract or
Development of International Standards, Guides and Recom-
order, a lot shall consist of all coils or reels of strand of the
mendations issued by the World Trade Organization Technical
same diameter and unit lengths submitted for inspection at the
Barriers to Trade (TBT) Committee.
same time.
2. Referenced Documents
3.1.2 production lot, n—all of the wire spools loaded into a
2
2.1 ASTM Standards: stranding machine that are used to produce a completed strand
B498/B498M Specification for Zinc-Coated (Galvanized)
cable.
Steel Core Wire for Use in Overhead Electrical Conduc-
4. Ordering Information
tors
4.1 Orders for material under this specification shall include
B502/B502M Specification for Aluminum-Clad Steel Core
the following information:
Wire for Use in Overhead Electrical Aluminum Conduc-
4.1.1 Length of each construction,
tors
4.1.2 Constructional description of stranded core (for
B606/B606M Specification for High-Strength Zinc-Coated
example, 7 × 0.0943 in. or 19 × 0.0977 in.) (8.1 and 8.2),
(Galvanized) Steel Core Wire for Use in Overhead Elec-
4.1.3 The multiple length of stranded core and the total
trical Conductors
number of multiple lengths per reel, if allowed (8.3 and Section
B802/B802M Specification for Zinc–5 % Aluminum-
15),
Mischmetal Alloy-Coated Steel Core Wire for Use in
4.1.4 Strength and coating type or aluminum clad (Section
Overhead Electrical Conductors
8),
4.1.5 Direction of lay of outer layer (Section 7),
1
This specification is under the jurisdiction of ASTM Committee B01 on
4.1.6 Packaging (Section 15), and
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
4.1.7 Place of inspection (Section 13).
Conductors of Ferrous Metals.
Current edition approved April 1, 2024. Published April 2024. Originally
5. Material
approved in 1969. Last previous edition approved in 2022 as B500/B500M – 22.
DOI: 10.1520/B0500_B0500M-24.
5.1 The coated or aluminum clad steel wire used in the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
production of the stranded core shall, prior to stranding, meet
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
all of the requirements of the appropriate specification that
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. follows:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B500/B500M − 24
5.1.1 Specification B498/B498M, 8.3 Recommended standard unit-stranded-core multiple
5.1.2 Specification B606/B606M, lengths are given in respective ASTM Conductor Standards.
5.1.3 Specification B802/B802M,
5.1.4 Specification B803/B803M,
...
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: B500/B500M − 22 B500/B500M − 24
Standard Specification for
Metallic Coated or Aluminum Clad Stranded Steel Core for
1
Use in Overhead Electrical Conductors
This standard is issued under the fixed designation B500/B500M; 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 7-wire, 19-wire, 37-wire, and 61-wire zinc-coated (galvanized), zinc-5 % aluminum-mischmetal
alloy-coated or aluminum clad stranded steel core intended for use in overhead electrical conductors.
1.2 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.
1.3 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
2.1 ASTM Standards:
B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical Conductors
B502/B502M Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
B606/B606M Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical
Conductors
B802/B802M Specification for Zinc–5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical
Conductors
B803/B803M Specification for High-Strength Zinc–5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in
Overhead Electrical Conductors
B957/B957M Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Use
in Overhead Electrical Conductors
B958/B958M Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc–5% Aluminum-Mischmetal Alloy-
Coated Steel Core Wire for Use in Overhead Electrical Conductors
E83 Practice for Verification and Classification of Extensometer Systems
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
1
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 May 1, 2022April 1, 2024. Published May 2022April 2024. Originally approved in 1969. Last previous edition approved in 20182022 as
B500/B500M – 12 (2018).B500/B500M – 22. DOI: 10.1520/B0500_B0500M-22.10.1520/B0500_B0500M-24.
2
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B500/B500M − 24
3.1.1 lot—lot, n—unless otherwise specified in the contract or order, a lot shall consist of all coils or reels of strand of the same
diameter and unit lengths submitted for inspection at the same time.
3.1.2 production lot—lot, n—all of the wire spools loaded into a stranding machine that are used to produce a completed strand
cable.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Length of each construction,
4.1.2 Constructional description of stranded core (for example, 7 × 0.0943 in. or 19 × 0.0977 in.) (8.1 and 8.2),
4.1.3 The multiple length of stranded core and the total number of multiple lengths per reel, if allowed (8.3 and Section 15),
4.1.4 Strength and coating type or aluminum clad (Section 8),
4.1.5 Direction of lay of outer layer (Section 7),
4.1.6 Packaging (Section 15), and
4.1.7 Place of inspection (Section 13).
5. Material
5.1 The coated or aluminum clad steel wire used in the production of the stranded core shall, prior to stranding, meet all of the
requirements of the appropriate specification that follows:
5.1.1 Specification B498/B498M,
5.1
...
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