ASTM B566-93(2002)
(Specification)Standard Specification for Copper-Clad Aluminum Wire
Standard Specification for Copper-Clad Aluminum Wire
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 the standard, except for resistivity and density, where the SI units are the standard. The values given in parentheses are for information only.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B 566 – 93 (Reapproved 2002)
Standard Specification for
Copper-Clad Aluminum Wire
This standard is issued under the fixed designation B 566; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.2 sample—a quantity of production units (coils, reels,
etc.) selected at random from the lot for the purpose of
1.1 This specification covers bare round copper-clad alumi-
determining conformance of the lot to the requirements of this
num wire for electrical applications.
specification.
1.2 Four classes of copper-clad aluminum wire are covered
3.1.3 specimen—a length of wire removed for test purposes
as follows:
from any individual production unit of the sample.
Class 10A—Nominal 10 volume % copper, annealed.
Class 15A—Nominal 15 volume % copper, annealed.
4. Ordering Information
Class 10H—Nominal 10 volume % copper, hard-drawn.
4.1 Orders for material under this specification shall include
Class 15H—Nominal 15 volume % copper, hard-drawn.
the following information:
1.3 The values stated in inch-pound units are to be regarded
4.1.1 Quantity of each size and class.
as the standard, except for resistivity and density, where the SI
4.1.2 Wire size, diameter in inches (see Section 7 and Table
units are the standard. The values given in parentheses are for
1).
information only.
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
inspection if required, 13.1).
2.1 The following documents of the issue in effect on date
4.1.5 Place of inspection (see 13.1).
of material purchase form a part of this specification to the
extent referenced herein:
5. Materials and Manufacture
2.2 ASTM Standards:
5.1 The wire shall consist of a core of aluminum with a
B 193 Test Method for Resistivity of Electrical Conductor
2 continuous outer cladding of copper thoroughly bonded to the
Materials
core throughout and shall be of such quality as to meet the
B 258 Specification for Standard Nominal Diameters and
requirements of this specification.
Cross-Sectional Areas of AWG Sizes of Solid Round Wires
Used as Electrical Conductors
6. General Requirements
2.3 National Institute of Standards and Technology:
6.1 Tensile Strength and Elongation—The copper-clad alu-
NBS Handbook 100—Copper Wire Tables
minum wire shall conform to the tensile strength and elonga-
tion requirements of Table 1. For intermediate diameters not
3. Terminology
listed in Table 1, the elongation requirements of the next
3.1 Definitions of Terms Specific to This Standard:
smaller size shall apply; in the case of tensile strength the
3.1.1 lot—a lot is any amount of wire of one class and size
requirements of the next larger size shall apply.
presented for acceptance at one time; such amount, however,
6.2 Resistivity— The electrical resistivity at a temperature
not to exceed 100 production units.
of 20°C shall not exceed the values prescribed in Table 2. See
Note 1 for calculating electrical resistance.
NOTE 1—Relationships which may be useful in connection with the
This specification is under the jurisdiction of ASTM Committee B01 on
values of electrical resistivity prescribed in this specification are shown in
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
Table 3. Resistivity units are based on the International Annealed Copper
Composite Conductors.
Standard (IACS) adopted by IEC in 1913, which is ⁄58 V·mm /m and the
Current edition approved July 15, 1993. Published September 1993. Originally
e1 value of 0.15328 V·g/m at 20°C are respectively the international
published as B 566 – 72. Last previous edition B 566 – 88 (1993) .
equivalent of volume and weight resistivity of annealed copper equal to
Annual Book of ASTM Standards, Vol 02.03.
100 % conductivity. The later term means that a copper wire1min length
Available from the National Institute of Standards and Technology (NIST),
Gaithersburg, MD 20899. and weighing 1 g would have a resistance of 0.15328 V. This is equivalent
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 566 – 93 (2002)
TABLE 1 Tensile and Elongation Requirements for Copper-Clad
6.3 Cohesion—The copper-clad aluminum wire, when
Aluminum Wire
tested in accordance with 10.4, shall be free from seams or
Elongation, min,
splits. Examination of the wire shall be made at a magnification
Nominal
Tensile Strength %in10in.
Diameter
not to exceed 103.
(or 250 mm)
6.4 Adhesion—The copper-clad aluminum wire, when
Minimum All Maximum All
All H All A tested in accordance with 10.5, shall be free from cladding
H Classes A Classes
in. (mm)
Classes Classes
delamination not consistent with good commercial practice.
ksi (MPa) ksi (MPa)
Examination of the wire shall be made at a magnification not
0.0349 8.252 16 110 20 138 1.5 15
to exceed 103.
0.2893 7.348 16 110 20 138 1.5 15
0.2576 6.543 18 124 20 138 1.5 15
6.5 Joints—The finished wire shall contain no joints or
0.2294 5.827 20 138 20 138 1.5 15
splices.
6.6 Copper Thickness— The minimum copper thickness,
0.2043 5.189 22 152 20 138 1.5 15
0.1819 4.620 23 159 20 138 1.5 15
when tested in accordance with 10.6, shall be not less than the
0.1620 4.115 24 166 20 138 1.5 15
following:
0.1443 3.665 25 172 20 138 1.5 15
6.6.1 Class 10A and 10H wire shall have a minimum
0.1285 3.264 26 179 20 138 1.0 15 thickness of not less than 3.5 % of the wire radius.
0.1144 2.906 27 186 20 138 1.0 15
6.6.2 Class 15A and 15H wire shall have a minimum
0.1019 2.588 28 193 20 138 1.0 15
thickness of not less than 5.0 % of the wire radius.
0.0907 2.30 29 200 20 138 1.0 15
6.7 Copper Volume (Area)—The copper volume (area) per
0.0808 2.05 30 207 20 138 1.0 15
class, when tested in accordance with 10.6, shall meet the
0.0720 1.83 30 207 20 138 1.0 15
following tolerances:
0.0641 1.63 30 207 20 138 1.0 15
0.0571 1.45 30 207 20 138 1.0 15
6.7.1 Class 10A and 10H wire shall contain not less than
8 % and not more than 12 % copper by volume (area).
0.0508 1.29 30 207 20 138 1.0 15
6.7.2 Class 15A and 15H wire shall contain not less than
0.0453 1.15 30 207 20 138 1.0 15
0.0403 1.02 30 207 20 138 1.0 15
13 % and not more than 17 % copper by volume (area).
0.0359 0.912 30 207 20 138 1.0 15
7. Dimensions, Mass and Permissible Variations
0.0320 0.813 30 207 20 138 1.0 15
0.0285 0.724 30 207 20 138 1.0 15 7.1 The wire size shall be expressed as the diameter of the
0.0253 0.643 30 207 20 138 1.0 15
wire in decimal fractions of an inch to the nearest 0.0001 in.
0.0226 0.574 30 207 25 172 1.0 10
(0.003 mm) (Note 2). For diameters under 0.0100 in. (0.254
0.0201 0.511 30 207 25 172 1.0 10 mm), the wire shall not vary from the specified diameter by
0.0179 0.455 30 207 25 172 1.0 10
more than 60.0001 in. (60.003 mm) and for diameters of
0.0159 0.404 30 207 25 172 1.0 10
0.0100 in. (0.254 mm) and over, the wire shall not vary from
0.0142 0.361 30 207 25 172 1.0 10
the specified diameter by more than 61 %, expressed to the
0.0126 0.320 30 207 25 172 1.0 5
nearest 0.0001 in. (0.003 mm).
0.0113 0.287 30 207 25 172 1.0 5
0.0100 0.254 30 207 25 172 1.0 5
NOTE 2—The values of the wire diameters in Table 1 are given to the
0.0089 0.226 30 207 25 172 1.0 5
nearest 0.0001 in. (0.003 mm) and correspond to the standard sizes given
in Specification B 258. The use of gage numbers to specify wire sizes is
0.0080 0.203 30 207 25 172 1.0 5
not recognized in this specification because of the possibility of confusion.
0.0071 0.180 30 207 25 172 1.0 5
0.0063 0.160 30 207 25 172 1.0 5 A discussion of wire gages and related subjects is contained in “Copper
0.0056 0.142 30 207 25 172 1.0 5
Wire Tables,” NBS Handbook 100.
0.0050 0.127 30 207 25 172 1.0 5
8. Workmanship, Finish, and Appearance
8.1 The wire, when tested in accordance with 8.2, shall be
TABLE 2 Resistivity
free from pits, slivers, exposed aluminum, or other imperfec-
Resistivity, max, at 20°C
tions not consistent with good commercial practice.
Class of Wire V·mm /m
8.2 For wire diameters of 0.0720 in. (1.829 mm) and larger,
10A and 10H 0.02743 surface finish inspection shall be made with the unaided eye
15A and 15H 0.02676
(normal spectacles excepted) and for wire diameters smaller
than 0.0720 in., surface finish inspection shall be made at a
magnification not to exceed 103.
to a resistivity value of 875.20 V·lb/mile , which signifies the resistance
of a copper wire 1 mile in length weighing 1 lb. It is also equivalent, for 9. Sampling
example, to 1.7241 μV/cm of length of a copper bar 1 cm in cross section.
9.1 The number of production units in a sample shall be as
A complete discussion of this subject is contained in NBS Handbook 100.
follows:
The use of five significant figures in expressing resistivity does not imply
9.1.1 For tensile strength, elongation, resistivity, adhesion,
the need for greater accuracy of measurement than that specified in Test
cohesion, and dimensional measurements, the sample shall
Method B 193. The use of five significant figures is required for complete
reversible conversion from one set of resistivity units to another. consist of a quantity of production units shown in Table 4
B 566 – 93 (2002)
TABLE 3 Equivalent Resistivity Values
Volume Con- Resistivity Equivalents at 20°C
Class ductivity at Volume Mass/Unit Length
2 2
20°C % IACS V·mm /m V·cmil/ft μV·in. μV·cm V·lb/mile2 V·g/m
10A and 10H 62.854 0.027430 16.500 1.0799 2.7430 526.26 0.092164
15A and 15H 64.416 0.026765 16.100 1.0537 2.6765 560.88 0.098227
TABLE 4 Sampling for Mechanical and Electrical Tests
applied and be as near 10 in. as practicable and the final length
First Sample Second Sample shall be the distance between the jaws at the time of rupture.
The fracture shall be between gage marks in the case of
Allowable
Allowable
Number of
specimens so marked or between the jaws of the testing
Number of Number
Number
Number of Defects
Defects in of Units machine and not closer than 1 in. (25 mm) to either gage mark
o
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