ASTM B958/B958M-19

Standard 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

SCOPE
1.1 This specification covers round, extra-high-strength, and ultra-high-strength, Class A coated zinc–5 % aluminum-mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for use in Overhead Electrical Conductors.  
1.2 This specification covers wire of diameter from 0.0500 to 0.1900 in. inclusive 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 standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

General Information

• Status: Historical
• Publication Date: 28-Feb-2019
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.05 - Conductors of Ferrous Metals

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B958/B958M −19
Standard Specification for
Extra-High-Strength and Ultra-High-Strength Class A
Zinc–5% Aluminum-Mischmetal Alloy-Coated Steel Core
1
Wire for Use in Overhead Electrical Conductors
This standard is issued under the fixed designation B958/B958M; 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 A751 Test Methods, Practices, and Terminology for Chemi-
cal Analysis of Steel Products
1.1 Thisspecificationcoversround,extra-high-strength,and
B193 Test Method for Resistivity of Electrical Conductor
ultra-high-strength, Class A coated zinc–5 % aluminum-
Materials
mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for
B750 Specification for GALFAN
use in Overhead Electrical Conductors.
E1277 Test Method for Analysis of Zinc-5 % Aluminum-
1.2 This specification covers wire of diameter from 0.0500
Mischmetal Alloys by ICP Emission Spectrometry
to 0.1900 in. inclusive or 1.27 to 4.82 mm inclusive.
E29 Practice for Using Significant Digits in Test Data to
1.3 The values stated in either SI units or inch-pound units Determine Conformance with Specifications
are to be regarded separately as standard. The values stated in 2.2 Other Standard:
each system may not be exact equivalents; therefore, each GF-1 Standard Practice for Determination of Cerium and
Lanthanum Compositions in GalfanAlloy (5 %Al-0.04 %
system shall be used independently of the other. Combining
3
values from the two systems may result in non-conformance La- 0.04 % Ce-Bal SHG Zn)
with the standard.
3. Terminology
1.4 This standard does not purport to address all of the
3.1 Abbreviations:
safety concerns, if any, associated with its use. It is the
3.1.1 MM—mischmetal
responsibility of the user of this standard to establish appro-
3.1.2 Zn–5Al–MM—zinc–5 % aluminum mischmetal alloy
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3.2 Definitions of Terms Specific to This Standard:
1.5 This international standard was developed in accor-
3.2.1 Lot, n—Unless otherwise specified in the contract or
dance with internationally recognized principles on standard-
order, a lot shall consist of all coils of wire of the same
ization established in the Decision on Principles for the
diameter and unit lengths submitted for inspection at the same
Development of International Standards, Guides and Recom-
time.
mendations issued by the World Trade Organization Technical
3.2.2 Product Code, n—Defines product coating type, coat-
Barriers to Trade (TBT) Committee.
ing class, and strength grade.
2. Referenced Documents 3.2.2.1 Extra High Strength Grade Zn–5Al–MM, Class A
2 Coated—use Code MA4.
2.1 ASTM Standards:
3.2.2.2 Ultra High Strength Grade Zn–5Al–MM, Class A
A90/A90M Test Method for Weight [Mass] of Coating on
Coated—use Code MA5.
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A370 Test Methods and Definitions for Mechanical Testing
4. Ordering Information
of Steel Products
4.1 Orders for material under this specification shall include
1 the following information:
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
4.1.1 Quantity of each size,
Conductors of Ferrous Metals.
4.1.2 Wire diameter in inches or millimeter (Section 13),
Current edition approved March 1, 2019. Published April 2019. Originally
4.1.3 Certification, if required (Section 18),
approved in 2008. Last previous edition approved in 2016 as B958 – 16. DOI:
4.1.4 Test report, if required (Section 18), and
10.1520/B0958_B0958M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from the International Lead Zinc Research Organization (ILZRO),
the ASTM website. 1822 NC Highway 54 East, Suite 120, Durham NC 27713, http://www.ilzro.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B958/B958M−19
TABLE 2 Grade 4 Extra-High-Strength Tensile Requirements
4.1.5 Package Size (Section 19).
4.1.6 Product Code Stress Ultimate Elongation
Specified Diameter, at 1% Tensile in 10 in.,
in. Extension, Strength, min %
5. Materials and Manufacture
min, kpsi min, kpsi
0.0500 to 0.0899, incl 225 265 3.0
5.1 The base metal shall be steel produced by the open-
0.0900 to 0.1199, incl 220 260 3.0
hearth, electr
...

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: B958/B958M − 16 B958/B958M − 19
Standard Specification for
Extra-High-Strength and Ultra-High-Strength Class A
Zinc–5% Aluminum-Mischmetal Alloy-Coated Steel Core
1
Wire for Use in Overhead Electrical Conductors
This standard is issued under the fixed designation B958/B958M; 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, extra-high-strength, and ultra-high-strength, Class A coated zinc–5 % aluminum-
mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for use in Overhead Electrical Conductors.
1.2 This specification covers wire of diameter from 0.0500 to 0.1900 in. inclusive 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 standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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:
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, Practices, and Terminology for Chemical Analysis of Steel Products
B193 Test Method for Resistivity of Electrical Conductor Materials
B750 Specification for GALFAN
E1277 Test Method for Analysis of Zinc-5 % Aluminum-Mischmetal Alloys by ICP Emission Spectrometry
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
2.2 Other Standard:
GF-1 Standard Practice for Determination of Cerium and Lanthanum Compositions in Galfan Alloy (5 % Al-0.04 % La- 0.04
3
% Ce-Bal SHG Zn)
3. Terminology
3.1 Abbreviations:
3.1.1 MM—mischmetal
3.1.2 Zn–5Al–MM—zinc–5 % aluminum mischmetal alloy
3.2 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 Dec. 1, 2016March 1, 2019. Published December 2016April 2019. Originally approved in 2008. Last previous edition approved in 20082016
ɛ1
as B958 – 0816. . DOI: 10.1520/B0958_B0958M-16.10.1520/B0958_B0958M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from the International Lead Zinc Research Organization (ILZRO), 1822 NC Highway 54 East, Suite 120, Durham NC 27713, http://www.ilzro.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B958/B958M − 19
3.2.1 Lot, n—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.
3.2.2 Product Code, n—Defines product coating type, coating class, and strength grade.
3.2.2.1 Extra High Strength Grade Zn–5Al–MM, Class A Coated—use Code MA4.
3.2.2.2 Ultra High Strength Grade Zn–5Al–MM, Class A Coated—use Code MA5.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Quantity of each size,
4.1.2 Wire diameter in inches or millimeter (Section 13),
4.1.3 Certification, if required (Section 18),
4.1.4 Test report, if required (Section 18), and
4.1.5 Package Size (Section 19).
4.1
...