ASTM B566-93(1998)e1

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

• Status: Historical
• Publication Date: 09-Mar-1998
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaced By: ASTM B566-93(2002) - Standard Specification for Copper-Clad Aluminum Wire
• Effective Date: 15-Jul-1993

Standards Content (Sample)

e1
Designation: B 566 – 93 (Reapproved 1998)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
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.
e NOTE—Editorial changes were made throughout in March 1998.
1. Scope 3.1.3 specimen—a length of wire removed for test purposes
from any individual production unit of the sample.
1.1 This specification covers bare round copper-clad alumi-
num wire for electrical applications.
4. Ordering Information
1.2 Four classes of copper-clad aluminum wire are covered
4.1 Orders for material under this specification shall include
as follows:
the following information:
Class 10A—Nominal 10 volume % copper, annealed.
4.1.1 Quantity of each size and class.
Class 15A—Nominal 15 volume % copper, annealed.
4.1.2 Wire size, diameter in inches (see Section 7 and Table
Class 10H—Nominal 10 volume % copper, hard-drawn.
1).
Class 15H—Nominal 15 volume % copper, hard-drawn.
4.1.3 Class of wire (see 1.2 and Table 1).
1.3 The values stated in inch-pound units are to be regarded
4.1.4 Packaging and shipping (Section 14 and packaging
as the standard, except for resistivity and density, where the SI
inspection if required, 13.1).
units are the standard. The values given in parentheses are for
4.1.5 Place of inspection (see 13.1).
information only.
5. Materials and Manufacture
2. Referenced Documents
5.1 The wire shall consist of a core of aluminum with a
2.1 The following documents of the issue in effect on date
continuous outer cladding of copper thoroughly bonded to the
of material purchase form a part of this specification to the
core throughout and shall be of such quality as to meet the
extent referenced herein:
requirements of this specification.
2.2 ASTM Standards:
B 193 Test Method for Resistivity of Electrical Conductor
6. General Requirements
Materials
6.1 Tensile Strength and Elongation—The copper-clad alu-
B 258 Specification for Standard Nominal Diameters and
minum wire shall conform to the tensile strength and elonga-
Cross-Sectional Areas of AWG Sizes of Solid Round Wires
2 tion requirements of Table 1. For intermediate diameters not
Used as Electrical Conductors
listed in Table 1, the elongation requirements of the next
2.3 National Institute of Standards and Technology:
3 smaller size shall apply; in the case of tensile strength the
NBS Handbook 100—Copper Wire Tables
requirements of the next larger size shall apply.
3. Terminology 6.2 Resistivity— The electrical resistivity at a temperature
of 20°C shall not exceed the values prescribed in Table 2. See
3.1 Definitions of Terms Specific to This Standard:
Note 1 for calculating electrical resistance.
3.1.1 lot—a lot is any amount of wire of one class and size
presented for acceptance at one time; such amount, however,
NOTE 1—Relationships which may be useful in connection with the
not to exceed 100 production units. values of electrical resistivity prescribed in this specification are shown in
Table 3. Resistivity units are based on the International Annealed Copper
3.1.2 sample—a quantity of production units (coils, reels,
Standard (IACS) adopted by IEC in 1913, which is ⁄58 V·mm /m and the
etc.) selected at random from the lot for the purpose of
value of 0.15328 V·g/m at 20°C are respectively the international
determining conformance of the lot to the requirements of this
equivalent of volume and weight resistivity of annealed copper equal to
specification.
100 % conductivity. The later term means that a copper wire1min length
and weighing 1 g would have a resistance of 0.15328 V. This is equivalent
1 to a resistivity value of 875.20 V·lb/mile , which signifies the resistance
This specification is under the jurisdiction of ASTM Committee B-1 on
of a copper wire 1 mile in length weighing 1 lb. It is also equivalent, for
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
example, to 1.7241 μV/cm of length of a copper bar 1 cm in cross section.
Composite Conductors.
Current edition approved July 15, 1993. Published September 1993. Originally A complete discussion of this subject is contained in NBS Handbook 100.
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published as B 566 – 72. Last previous edition B 566 – 88 (1993) .
The use of five significant figures in expressing resistivity does not imply
Annual Book of ASTM Standards, Vol 02.03.
the need for greater accuracy of measurement than that specified in Test
Available from the National Institute of Standards and Technology (NIST),
Method B 193. The use of five significant figures is required for complete
Gaithersburg, MD 20899.
B 566
TABLE 1 Tensile and Elongation Requirements for Copper-Clad
6.5 Joints—The finished wire shall contain no joints or
Aluminum Wire
splices.
Elongation, min,
6.6 Copper Thickness— The minimum copper thickness,
Nominal
Tensile Strength %in10in.
Diameter
when tested in accordance with 10.6, shall be not less than the
(or 250 mm)
following:
Minimum All Maximum All
All H All A 6.6.1 Class 10A and 10H wire shall have a minimum
H Classes A Classes
in. (mm)
Classes Classes
thickness of not less than 3.5 % of the wire radius.
ksi (MPa) ksi (MPa)
6.6.2 Class 15A and 15H wire shall have a minimum
0.0349 8.252 16 110 20 138 1.5 15
thickness of not less than 5.0 % of the wire radius.
0.2893 7.348 16 110 20 138 1.5 15
0.2576 6.543 18 124 20 138 1.5 15
6.7 Copper Volume (Area)—The copper volume (area) per
0.2294 5.827 20 138 20 138 1.5 15
class, when tested in accordance with 10.6, shall meet the
following tolerances:
0.2043 5.189 22 152 20 138 1.5 15
0.1819 4.620 23 159 20 138 1.5 15
6.7.1 Class 10A and 10H wire shall contain not less than
0.1620 4.115 24 166 20 138 1.5 15
8 % and not more than 12 % copper by volume (area).
0.1443 3.665 25 172 20 138 1.5 15
6.7.2 Class 15A and 15H wire shall contain not less than
0.1285 3.264 26 179 20 138 1.0 15
13 % and not more than 17 % copper by volume (area).
0.1144 2.906 27 186 20 138 1.0 15
0.1019 2.588 28 193 20 138 1.0 15 7. Dimensions, Mass and Permissible Variations
0.0907 2.30 29 200 20 138 1.0 15
7.1 The wire size shall be expressed as the diameter of the
0.0808 2.05 30 207 20 138 1.0 15
wire in decimal fractions of an inch to the nearest 0.0001 in.
0.0720 1.83 30 207 20 138 1.0 15
(0.003 mm) (Note 2). For diameters under 0.0100 in. (0.254
0.0641 1.63 30 207 20 138 1.0 15
mm), the wire shall not vary from the specified diameter by
0.0571 1.45 30 207 20 138 1.0 15
more than 60.0001 in. (60.003 mm) and for diameters of
0.0508 1.29 30 207 20 138 1.0 15
0.0100 in. (0.254 mm) and over, the wire shall not vary from
0.0453 1.15 30 207 20 138 1.0 15
the specified diameter by more than 61 %, expressed to the
0.0403 1.02 30 207 20 138 1.0 15
0.0359 0.912 30 207 20 138 1.0 15
nearest 0.0001 in. (0.003 mm).
0.0320 0.813 30 207 20 138 1.0 15
NOTE 2—The values of the wire diameters in Table 1 are given to the
0.0285 0.724 30 207 20 138 1.0 15
nearest 0.0001 in. (0.003 mm) and correspond to the standard sizes given
0.0253 0.643 30 207 20 138 1.0 15
in Specification B 258. The use of gage numbers to specify wire sizes is
0.0226 0.574 30 207 25 172 1.0 10
not recognized in this specification because of the possibility of confusion.
A discussion of wire gages and related subjects is contained in “Copper
0.0201 0.511 30 207 25 172 1.0 10
0.0179 0.455 30 207 25 172 1.0 10 Wire Tables,” NBS Handbook 100.
0.0159 0.404 30 207 25 172 1.0 10
0.0142 0.361 30 207 25 172 1.0 10 8. Workmanship, Finish, and Appearance
8.1 The wire, when tested in accordance with 8.2, shall be
0.0126 0.320 30 207 25 172 1.0 5
0.0113 0.287 30 207 25 172 1.0 5
free from pits, slivers, exposed aluminum, or other imperfec-
0.0100 0.254 30 207 25 172 1.0 5
tions not consistent with good commercial practice.
0.0089 0.226 30 207 25 172 1.0 5
8.2 For wire diameters of 0.0720 in. (1.829 mm) and larger,
0.0080 0.203 30 207 25 172 1.0 5
surface finish inspection shall be made with the unaided eye
0.0071 0.180 30 207 25 172 1.0 5
(normal spectacles excepted) and for wire diameters smaller
0.0063 0.160 30 207 25 172 1.0 5
than 0.0720 in., surface finish inspection shall be made at a
0.0056 0.142 30 207 25 172 1.0 5
0.0050 0.127 30 207 25 172 1.0 5
magnification not to exceed 103.
9. Sampling
TABLE 2 Resistivity
9.1 The number of production units in a sample shall be as
Resistivity, max, at 20°C
follows:
Class of Wire V·mm /m
9.1.1 For tensile strength, elongation, resistivity, adhesion,
10A and 10H 0.02743
cohesion, and dimensional measurements, the sample shall
15A and 15H 0.02676
consist of a quantity of production units shown in Table 4
under heading “First Sample.” From each unit, one test
reversible conversion from one set of resistivity units to another.
specimen of sufficient length shall be removed for the perfor-
6.3 Cohesion—The copper-clad aluminum wire, when
mance of the required tests.
tested in accordance with 10.4, shall be free from seams or
9.1.2 For surface finish and packaging inspection (when
splits. Examination of the wire shall be made at a magnification
specified by the purchaser at the time of placing the order), the
not to exceed 103.
sample shall consist of a quantity of production units as shown
6.4 Adhesion—The copper-clad aluminum wire, when
in Table 5.
tested in accordance with 10.5, shall be free from cladding
10. Test Methods
delamination not consistent with good commercial practice.
Examination of the wire shall be made at a magnification not 10.1 Tensile Strength and Elongation—The tensile strength,
to exceed 103. expressed in pounds-force per square inch (or megapascals),
B 566
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
...