ASTM B958/B958M-16
(Specification)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
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:B958/B958M −16
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 E1277 Test Method for Analysis of Zinc-5 % Aluminum-
Mischmetal Alloys by ICP Emission Spectrometry
1.1 Thisspecificationcoversround,extra-high-strength,and
E29 Practice for Using Significant Digits in Test Data to
ultra-high-strength, Class A coated zinc–5 % aluminum-
Determine Conformance with Specifications
mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for
2.2 Other Standard:
use in Overhead Electrical Conductors.
GF-1 Standard Practice for Determination of Cerium and
1.2 This specification covers wire of diameter from 0.0500
Lanthanum Compositions in GalfanAlloy (5 %Al-0.04 %
3
to 0.1900 in. inclusive or 1.27 to 4.82 mm inclusive.
La- 0.04 % Ce-Bal SHG Zn)
1.3 The values stated in either SI units or inch-pound units
3. Terminology
are to be regarded separately as standard. The values stated in
3.1 Abbreviations:
each system may not be exact equivalents; therefore, each
3.1.1 MM—mischmetal
system shall be used independently of the other. Combining
3.1.2 Zn–5Al–MM—zinc–5 % aluminum mischmetal alloy
values from the two systems may result in non-conformance
with the standard.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 Lot, n—Unless otherwise specified in the contract or
1.4 This standard does not purport to address all of the
order, a lot shall consist of all coils of wire of the same
safety concerns, if any, associated with its use. It is the
diameter and unit lengths submitted for inspection at the same
responsibility of the user of this standard to establish appro-
time.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3.2.2 Product Code, n—Defines product coating type, coat-
ing class, and strength grade.
2. Referenced Documents
3.2.2.1 Extra High Strength Grade Zn–5Al–MM, Class A
2
2.1 ASTM Standards:
Coated—use Code MA4.
A90/A90M Test Method for Weight [Mass] of Coating on
3.2.2.2 Ultra High Strength Grade Zn–5Al–MM, Class A
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
Coated—use Code MA5.
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products 4. Ordering Information
A751 Test Methods, Practices, and Terminology for Chemi-
4.1 Orders for material under this specification shall include
cal Analysis of Steel Products
the following information:
B193 Test Method for Resistivity of Electrical Conductor
4.1.1 Quantity of each size,
Materials
4.1.2 Wire diameter in inches or millimeter (Section 13),
B750 Specification for GALFAN
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).
1
This specification is under the jurisdiction of ASTM Committee B01 on
4.1.6 Product Code
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
Conductors of Ferrous Metals.
5. Materials and Manufacture
Current edition approved Dec. 1, 2016. Published December 2016. Originally
ɛ1
approved in 2008. Last previous edition approved in 2008 as B958 – 08 . DOI:
5.1 The base metal shall be steel produced by the open-
10.1520/B0958_B0958M-16.
hearth, electric furnace, or basic oxygen process.
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
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−16
TABLE 2 Grade 4 Extra-High-Strength Tensile Requirements
5.2 The wire shall be cold drawn and coated with
Zn–5Al–MM alloy to produce the desired properties. Stress Ultimate Elongation
Specified Diameter, at 1% Tensile in 10 in.,
in. Extension, Strength, min %
6. Chemical Composition
min, kpsi min, kpsi
6.1 The steel shall conform to the requirements prescribed 0.0500 to 0.0899, incl 225 265 3.0
0.0900 to 0.1199, incl 220 260 3.0
in Table 1.
0.1200 to 0.1399, incl 215 255 3.5
0.1400 to 0.1900, incl 210 250 3.5
6.2 Chemical analysis of the steel sh
...
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.
´1
Designation: B958/B958M − 08 B958/B958M − 16
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
ε NOTE—Designation was corrected editorially in October 2013.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
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%zinc–5 % aluminum mischmetal alloy
3.2 Definitions of Terms Specific to This Standard:
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.
1
This test method 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 Nov. 1, 2008Dec. 1, 2016. Published December 2008December 2016. Originally approved in 2008. Last previous edition approved in 2008 as
ɛ1
B958 – 08 . DOI: 10.1520/B0958_B0958M-08E01.10.1520/B0958_B0958M-16.
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’sstandard’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 − 16
3.2.2 Product Code, n—Defines product coating type, coating class, and strength grade.
•Extra High Strength Grade Zn–5Al–MM, Class A Coated, use Code MA4.
•Ultra High Strength Grade Zn–5Al–MM, Class A Coated, use Code MA5.
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).
4.1.6 Product Code
5. Materials and Manufacture
5.1 The base metal shall be steel produced by the open-hearth, electric furna
...
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