ASTM B958/B958M-08e1

Standard Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc<span class='unicode'>&#x2013;</span>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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2008
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.05 - Conductors of Ferrous Metals

Relations

• Replaces: ASTM B958-08 - Standard Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc<span class='unicode'>&#x2013;</span>5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors
• Effective Date: 01-Nov-2008
• Replaced By: ASTM B958/B958M-16 - Standard Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc&#x2013;5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in Overhead Electrical Conductors
• Effective Date: 01-Dec-2016
• Referred By: ASTM B232/B232M-22 - Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Reinforced (ACSR)
• Effective Date: 01-Nov-2008
• Referred By: ASTM B500/B500M-22 - Standard Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors
• Effective Date: 01-Nov-2008
• Referred By: ASTM B856-22 - Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Supported (ACSS)
• Effective Date: 01-Nov-2008
• Referred By: ASTM B857-22 - Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)
• Effective Date: 01-Nov-2008
• Referred By: ASTM B711-22 - Standard Specification for Concentric-Lay-Stranded Aluminum-Alloy Conductors, Steel Reinforced (AACSR) (6201)
• Effective Date: 01-Nov-2008
• Referred By: ASTM B1006-17 - Standard Specification for Electrical Overhead Conductor Code Word Names
• Effective Date: 01-Nov-2008

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
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Designation:B958/B958M −08
Standard Specification for
Extra-High-Strength and Ultra-High-Strength Class A
Zinc–5% Aluminum-Mischmetal Alloy-Coated Steel Core
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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 B750 Specification for GALFAN (Zinc-5 % Aluminum-
Mischmetal) Alloy in Ingot Form for Hot-Dip Coatings
1.1 Thisspecificationcoversround,extra-high-strength,and
E1277 Test Method for Chemical Analysis of Zinc-5 %
ultra-high-strength, Class A coated zinc–5 % aluminum-
Aluminum-Mischmetal Alloys by ICP Emission Spec-
mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for
trometry
use in Overhead Electrical Conductors.
E29 Practice for Using Significant Digits in Test Data to
1.2 This specification covers wire of diameter from 0.0500
Determine Conformance with Specifications
to 0.1900 in. inclusive or 1.27 to 4.82 mm inclusive.
2.2 Other Standard:
1.3 The values stated in either SI units or inch-pound units
GF-1 Standard Practice for Determination of Cerium and
are to be regarded separately as standard. The values stated in
Lanthanum Compositions in GalfanAlloy (5 %Al-0.04 %
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each system may not be exact equivalents; therefore, each
La- 0.04 % Ce-Bal SHG Zn)
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance 3. Terminology
with the standard.
3.1 Abbreviations:
1.4 This standard does not purport to address all of the
3.1.1 MM—mischmetal
safety concerns, if any, associated with its use. It is the 3.1.2 Zn–5Al–MM—zinc–5% aluminum mischmetal alloy
responsibility of the user of this standard to establish appro-
3.2 Definitions of Terms Specific to This Standard:
priate safety and health practices and determine the applica-
3.2.1 Lot, n—Unless otherwise specified in the contract or
bility of regulatory limitations prior to use.
order, a lot shall consist of all coils of wire of the same
diameter and unit lengths submitted for inspection at the same
2. Referenced Documents
time.
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2.1 ASTM Standards:
3.2.2 Product Code, n—Defines product coating type, coat-
A90/A90M Test Method for Weight [Mass] of Coating on
ing class, and strength grade.
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
•Extra High Strength Grade Zn–5Al–MM, Class A Coated,
A370 Test Methods and Definitions for Mechanical Testing
use Code MA4.
of Steel Products
•Ultra High Strength Grade Zn–5Al–MM, Class A Coated,
A751 Test Methods, Practices, and Terminology for Chemi-
use Code MA5.
cal Analysis of Steel Products
B193 Test Method for Resistivity of Electrical Conductor
4. Ordering Information
Materials
4.1 Orders for material under this specification shall include
the following information:
4.1.1 Quantity of each size,
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This test method is under the jurisdiction of ASTM Committee B01 on
4.1.2 Wire diameter in inches or millimeter (Section 13),
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
Conductors of Ferrous Metals.
4.1.3 Certification, if required (Section 18),
Current edition approved Nov. 1, 2008. Published December 2008. DOI:
4.1.4 Test report, if required (Section 18), and
10.1520/B0958_B0958M-08E01.
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
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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
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B958/B958M−08
TABLE 2 Grade 4 Extra-High-Strength Tensile Requirements
4.1.5 Package Size (Section 19).
4.1.6 Product Code Specified Diameter, Stress Ultimate Elongation
in. at 1% Tensile in 10 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, electric furnace, or basic oxygen process.
0.1200 to 0.1399, incl 215 255 3.5
0.1400 to 0.1900, incl 210 250 3.5
5.2 The wire shall be cold drawn and coated with
Zn–5Al–MM alloy to produce the desired properties.
TABLE 3 Grade 4 Extra-High-Strength Tensile Requirements
6. Chemical Composi
...