ASTM B566-04a(2021)

Standard Specification for Copper-Clad Aluminum Wire

ABSTRACT
This specification covers bare round copper-clad aluminum wire for electrical applications. Four classes of copper-clad aluminum wire are covered such as Class 10A, Class 15A, Class 10H, Class 15H. The wire shall consist of a core of aluminum with a continuous outer cladding of copper throughly bonded to the core throughout and shall be of such quality as to meet the requirements of this specification. The copper-clad aluminum wire shall conform to the tensile strength and elongation requirements. The electrical resistivity shall be measured. The copper-clad aluminum wire, when tested shall be free from seams or splits. They shall be free from cladding delamination. The finished wire shall contain no joints or splices. The density of the wire shall be taken for calculating mass/unit length, cross section and so forth.
SCOPE
1.1 This specification covers bare round copper-clad aluminum wire for electrical applications.  
1.2 Four classes of copper-clad aluminum wire are covered as follows:
Class 10A—Nominal 10 volume % copper, annealed,
Class 15A—Nominal 15 volume % copper, annealed,
Class 10H—Nominal 10 volume % copper, hard-drawn,
Class 15H—Nominal 15 volume % copper, hard-drawn.  
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3.1 Exception—The values stated in SI units for resistivity and density are to be regarded as 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.

General Information

• Status: Published
• Publication Date: 30-Sep-2021
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Standards Content (Sample)

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:B566 −04a (Reapproved 2021)
Standard Specification for
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Copper-Clad Aluminum Wire
This standard is issued under the fixed designation B566; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Wires Used as Electrical Conductors
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2.3 NIST Standard:
1.1 This specification covers bare round copper-clad alumi-
NBS Handbook 100— Copper Wire Tables
num wire for electrical applications.
1.2 Four classes of copper-clad aluminum wire are covered
3. Terminology
as follows:
3.1 Definitions of Terms Specific to This Standard:
Class 10A—Nominal 10 volume % copper, annealed,
3.1.1 lot—a lot is any amount of wire of one class and size
Class 15A—Nominal 15 volume % copper, annealed,
presented for acceptance at one time; such amount, however,
Class 10H—Nominal 10 volume % copper, hard-drawn,
not to exceed 100 production units.
Class 15H—Nominal 15 volume % copper, hard-drawn.
3.1.2 sample—a quantity of production units (coils, reels,
1.3 The values stated in inch-pound units are to be regarded
andsoforth)selectedatrandomfromthelotforthepurposeof
as standard. The values given in parentheses are mathematical
determining conformance of the lot to the requirements of this
conversions to SI units that are provided for information only
specification.
and are not considered standard.
3.1.3 specimen—a length of wire removed for test purposes
1.3.1 Exception—ThevaluesstatedinSIunitsforresistivity
from any individual production unit of the sample.
and density are to be regarded as standard.
1.4 This international standard was developed in accor-
4. Ordering Information
dance with internationally recognized principles on standard-
4.1 Ordersformaterialunderthisspecificationshallinclude
ization established in the Decision on Principles for the
the following information:
Development of International Standards, Guides and Recom-
4.1.1 Quantity of each size and class;
mendations issued by the World Trade Organization Technical
4.1.2 Wire size, diameter in inches (see Section 7 and Table
Barriers to Trade (TBT) Committee.
1);
4.1.3 Class of wire (see 1.2 and Table 1);
2. Referenced Documents
4.1.4 Packaging and shipping (Section 14 and packaging
2.1 The following documents of the issue in effect on date
inspection if required, 13.1); and
of material purchase form a part of this specification to the
4.1.5 Place of inspection (see 13.1).
extent referenced herein:
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2.2 ASTM Standards: 5. Materials and Manufacture
B193Test Method for Resistivity of Electrical Conductor
5.1 The wire shall consist of a core of aluminum with a
Materials
continuous outer cladding of copper thoroughly bonded to the
B258Specification for Standard Nominal Diameters and
core throughout and shall be of such quality as to meet the
Cross-Sectional Areas of AWG Sizes of Solid Round
requirements of this specification.
6. General Requirements
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This specification is under the jurisdiction of ASTM Committee B01 on
6.1 Tensile Strength and Elongation—The copper-clad alu-
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
minum wire shall conform to the tensile strength and elonga-
Bi-Metallic Conductors.
Current edition approved Oct. 1, 2021. Published October 2021. Originally
tion requirements of Table 1. For intermediate diameters not
approved in 1972. Last previous edition approved in 2016 as B566–04a (2016).
listed in Table 1, the elongation requirements of the next
DOI: 10.1520/B0566-04AR21.
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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 National Institute of Standards and Technology (NIST), 100
the ASTM website. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
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B566−04a (2021)
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TABLE 1 Tensile and Elongation Requirements for Copper-Clad value of 0.15328 Ω·g/m at 20°C are, respectively, the international
Aluminum Wire
equivalent of volume and weight resistivity of annealed copper equal to
100%conductivity.Thelatertermmeansthatacopperwire1minlength
Elongation, min,
Nominal
andweighing1gwouldhavear
...