ASTM B502-98

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 502 – 98
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
Aluminum-Clad Steel Core Wire for Aluminum Conductors,
1
Aluminum-Clad Steel Reinforced
This standard is issued under the fixed designation B 502; 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.
1. Scope 5. Tensile Properties
1.1 This specification covers round, aluminum-clad steel 5.1 Requirements— The aluminum-clad steel core wire
core wire used for mechanical reinforcement in the manufac- shall conform to the tensile requirements prescribed in Table 1.
ture of aluminum conductors, aluminum-clad steel reinforced. In computing stress at 1 % extension and ultimate tensile
1.2 The values stated in inch-pound units are to be regarded strength, the actual diameter of the finished wire shall be used.
as the standard. The SI equivalents of the inch-pound units may 5.2 Elongation Test— The elongation shall be determined
be approximate. by an extensometer suitable for measuring elongation in 10.0
in. (250 mm) and equipped with a vernier or other instrument
2. Referenced Documents
reading to 0.001 in. (0.025 mm). It shall be attached to the test
2.1 The following documents of the issue in effect on date specimen at a load equal to the initial tensile stress shown in
of material purchase form a part of this specification to the
Table 2. At this load the extensometer shall be adjusted to the
extent referenced herein. initial setting shown in Table 2. Upon application of further
2.2 ASTM Standards:
load, the tension shall be read at an extensometer reading of
B 193 Test Method for Resistivity of Electrical Conductor 1.0 % to determine conformance with the requirement in Table
2
Materials
1. Further elongation shall be observed while applying a
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E 8 Test Methods of Tension Testing of Metallic Materials tension load to the specimen. The elongation thus determined
shall be not less than 1.5 % in 10.0 in. (250 mm). A test in
3. Ordering Information
which the extensometer reading is less than 1.5 % shall be
3.1 Orders for material under this specification shall include
disregarded if the fracture occurs less than 1.0 in. (25 mm)
the following information:
from either attachment. In this case, another specimen from the
3.1.1 Quantity of each size,
same reel or coil shall be tested.
3.1.2 Wire size: diameter in inches (see 6.1)
5.3 The tension tests shall be made in accordance with Test
3.1.3 Package size: (see 17.1),
Methods E 8. The method for determining elongation is de-
3.1.4 Special packaging and package marking if required
scribed in the Procedures Section of Test Methods E 8.
(see 16.1), and
6. Dimensions and Permissible Variations
3.1.5 Place of inspection if other than place of manufacture
(see 14.1).
6.1 The size shall be expressed by the wire diameter in
decimals of an inch to the nearest 0.0001 in. (0.003 mm).
4. Materials and Manufacture
6.2 Within the range of diameters included in Table 3 the
4.1 The base metal shall be steel produced by the open-
wire shall not vary from the nominal diameter by more than the
hearth, electric-furnace, or basic-oxygen process and shall be
amounts shown in this table. In computing permissible varia-
of such composition that the finished clad wire shall have the
tions, diameters shall be rounded to the nearest 0.0001 in.
properties and characteristics prescribed in this specification.
(0.003 mm).
4.2 The aluminum used for cladding shall have a purity and
6.3 If accessible, one measurement shall be taken near each
quantity sufficient to meet thickness and resistance require-
end and one near the middle of the coil or reel. In the case of
ments of this specification (see 7.1 and 9.1).
reels, the center and one end may not be accessible and the
prescribed measurement shall be taken along the length of the
accessible material. If any of the selected coils or reels fail to
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This specification is under the jurisdiction of ASTM Committee B-1 on
conform to the requirements as prescribed in 6.2, all coils or
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
reels shall be measured in the manner specified.
Composite Conductors.
Current edition approved March 10, 1998. Published September 1998. Originally
7. Thickness of Aluminum
published as B 502 – 70. Last previous edition B 502 – 93.
2
Annual Book of ASTM Standards, Vol 02.03.
7.1 The aluminum thickness at any point shall be not less
3
Annual Book of ASTM Standards, Vol 03.01.
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