ASTM B502/B502M-10e1
(Specification)Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
SCOPE
1.1 This specification covers round, aluminum-clad steel core wire with two designations of tensile strengths, AW2 (Normal Strength) and AW3 (High Strength).
1.2 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.
1.2.1 For conductor sizes designated by AWG, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
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Designation:B502/B502M −10
StandardSpecification for
Aluminum-Clad Steel Core Wire for Use in Overhead
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Electrical Aluminum Conductors
This standard is issued under the fixed designation B502/B502M; 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.
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ε NOTE—Designation was corrected editorially in October 2013.
1. Scope 3.1.3 Core Wire Strength, AW2 (Normal Strength) or AW3
(High Strength) (see Table 1 and Table 2),
1.1 This specification covers round, aluminum-clad steel
3.1.4 Package size: (see 17.1),
core wire with two designations of tensile strengths, AW2
3.1.5 Special packaging and package marking if required
(Normal Strength) and AW3 (High Strength).
(see 16.1), and
1.2 The values stated in either SI units or inch-pound units
3.1.6 Place of inspection if other than place of manufacture
are to be regarded separately as standard. The values stated in
(see 14.1).
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
4. Materials and Manufacture
values from the two systems may result in non-conformance
4.1 The base metal shall be steel produced by the open-
with the standard.
hearth, electric-furnace, or basic-oxygen process and shall be
1.2.1 For conductor sizes designated by AWG, the require-
of such composition that the finished clad wire shall have the
ments in SI units have been numerically converted from
properties and characteristics prescribed in this specification.
correspondingvaluesstatedorderivedininch-poundunits.For
4.2 The aluminum used for cladding shall have a purity and
conductor sizes designated by SI units only, the requirements
quantity sufficient to meet thickness and resistance require-
are stated or derived in SI units.
ments of this specification (see 7.1 and 9.1).
2. Referenced Documents
5. Tensile Properties
2.1 The following documents of the issue in effect on date
of material purchase form a part of this specification to the 5.1 Requirements—The aluminum-clad steel core wire shall
extent referenced herein. conform to the tensile requirements prescribed in Table 1 and
2 Table 2. Purchasers of core intended for use in conductor
2.2 ASTM Standards:
constructions with annealed aluminum wires, such as ACSS/
B193 Test Method for Resistivity of Electrical Conductor
AW3, ACSS/TW/AW3 may request the stranded steel core be
Materials
compliant only with ultimate tensile strength and may waive
E8 Test Methods for Tension Testing of Metallic Materials
compliance with the 1 % extension tensile requirement. This
use of the ultimate tensile requirement as an alternate to the 1
3. Ordering Information
% extension requirement shall be by agreement between the
3.1 Orders for material under this specification shall include
purchaser and producer and shall be noted on product compli-
the following information:
ance documentation. In computing stress at 1 % extension and
3.1.1 Quantity of each size,
ultimate tensile strength, the actual diameter of the finished
3.1.2 Wire size: diameter in inches (see 6.1),
wire shall be used.
5.2 ElongationTest—The elongation shall be determined by
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This specification is under the jurisdiction of ASTM Committee B01 on
an extensometer suitable for measuring elongation in 10.0 in.
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
[250 mm] and equipped with a vernier or other instrument
Composite Conductors.
reading to 0.001 in. [0.025 mm]. It shall be attached to the test
Current edition approved April 1, 2010. Published May 2010. Originally
specimen at a load equal to the initial tensile stress shown in
approved in 1970. Last previous edition approved in 2007 as B502 – 02 (2007).
DOI: 10.1520/B0502_B0502M-10E01.
Table 3 and Table 4. At this load the extensometer shall be
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
adjusted to the initial setting shown in Table 3 and Table 4.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Upon application of further load, the tension shall be read at an
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. extensometer reading of 1.0 % to determine conformance with
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B502/B502M−10
TABLE 1 Tensile Requirements for Normal Strength (AW2) For
1.0 in. [25 mm] from either attachment. In this case, another
ACSR/AW2, ACSR/TW/AW2 and ACSS/AW2, ACSR/TW/AW2 Type
specimen from
...
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