ASTM B502/B502M-10e2
(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
ABSTRACT
This specification covers round, aluminum-clad steel core wire used for mechanical reinforcement in the manufacture of aluminum conductors, aluminum-clad steel reinforced. The base metal shall be steel produced by the openhearth, electric-furnace, or basic-oxygen process and shall be of such composition that the finished clad wire shall have the properties and characteristics prescribed in this specification. The aluminum used for cladding shall have a purity and quantity sufficient to meet thickness and resistance requirements of this specification. The material shall conform to the required tensile properties such as stress, tensile strength, and elongation. The aluminum-clad steel core shall undergo elongation test, tension test, and torsion test. The elongation test shall be determined by an extensometer equipped with a vernier or other instrument reading. In the torsion test, a small tensile load shall be applied to the specimen during testing. The specimen shall be twisted by rotating one of the vises in the same direction until fracture occurs.
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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´2
Designation:B502/B502M −10
Standard Specification for
Aluminum-Clad Steel Core Wire for Use in Overhead
1
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.
1
ε NOTE—Designation was corrected editorially in October 2013.
2
ε NOTE—Editorial corrections were made in Section 9.1 in January 2016.
1. Scope 3.1.2 Wire size: diameter in inches (see 6.1),
3.1.3 Core Wire Strength, AW2 (Normal Strength) or AW3
1.1 This specification covers round, aluminum-clad steel
(High Strength) (see Table 1 and Table 2),
core wire with two designations of tensile strengths, AW2
3.1.4 Package size: (see 17.1),
(Normal Strength) and AW3 (High Strength).
3.1.5 Special packaging and package marking if required
1.2 The values stated in either SI units or inch-pound units
(see 16.1), and
are to be regarded separately as standard. The values stated in
3.1.6 Place of inspection if other than place of manufacture
each system may not be exact equivalents; therefore, each
(see 14.1).
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
4. Materials and Manufacture
with the standard.
4.1 The base metal shall be steel produced by the open-
1.2.1 For conductor sizes designated by AWG, the require-
hearth, electric-furnace, or basic-oxygen process and shall be
ments in SI units have been numerically converted from
of such composition that the finished clad wire shall have the
correspondingvaluesstatedorderivedininch-poundunits.For
properties and characteristics prescribed in this specification.
conductor sizes designated by SI units only, the requirements
are stated or derived in SI units. 4.2 The aluminum used for cladding shall have a purity and
quantity sufficient to meet thickness and resistance require-
2. Referenced Documents
ments of this specification (see 7.1 and 9.1).
2.1 The following documents of the issue in effect on date
5. Tensile Properties
of material purchase form a part of this specification to the
extent referenced herein.
5.1 Requirements—The aluminum-clad steel core wire shall
2
conform to the tensile requirements prescribed in Table 1 and
2.2 ASTM Standards:
Table 2. Purchasers of core intended for use in conductor
B193 Test Method for Resistivity of Electrical Conductor
constructions with annealed aluminum wires, such as ACSS/
Materials
AW3, ACSS/TW/AW3 may request the stranded steel core be
E8 Test Methods for Tension Testing of Metallic Materials
compliant only with ultimate tensile strength and may waive
compliance with the 1 % extension tensile requirement. This
3. Ordering Information
use of the ultimate tensile requirement as an alternate to the 1
3.1 Orders for material under this specification shall include
% extension requirement shall be by agreement between the
the following information:
purchaser and producer and shall be noted on product compli-
3.1.1 Quantity of each size,
ance documentation. In computing stress at 1 % extension and
ultimate tensile strength, the actual diameter of the finished
wire shall be used.
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
5.2 ElongationTest—The elongation shall be determined by
Bi-Metallic Conductors.
an extensometer suitable for measuring elongation in 10.0 in.
Current edition approved April 1, 2010. Published May 2010. Originally
[250 mm] and equipped with a vernier or other instrument
approved in 1970. Last previous edition approved in 2007 as B502 – 02 (2007).
DOI: 10.1520/B0502_B0502M-10E02.
reading to 0.001 in. [0.025 mm]. It shall be attached to the test
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specimen at a load equal to the initial tensile stress shown in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Table 3 and Table 4. At this load the extensometer shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. adjusted to the initial setting shown in Table 3 and Table 4.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B502/B502M−10
TABLE 1 Tensile Requirements for Normal Strength (AW2) For
in. [250 mm]. A test in which the extensometer reading is less
ACSR/AW2, ACSR/TW/AW2 and ACSS/AW2, ACSR/TW/AW2 Type
than 1.5 % shall be disregarded if the fracture occurs less th
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´2 ´2
Designation: B502/B502M − 10 B502/B502M − 10
Standard Specification for
Aluminum-Clad Steel Core Wire for Use in Overhead
1
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.
1
ε NOTE—Designation was corrected editorially in October 2013.
2
ε NOTE—Editorial corrections were made in Section 9.1 in January 2016.
1. 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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein.
2
2.2 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor Materials
E8 Test Methods for Tension Testing of Metallic Materials
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size,
3.1.2 Wire size: diameter in inches (see 6.1),
3.1.3 Core Wire Strength, AW2 (Normal Strength) or AW3 (High Strength) (see Table 1 and Table 2),
3.1.4 Package size: (see 17.1),
3.1.5 Special packaging and package marking if required (see 16.1), and
3.1.6 Place of inspection if other than place of manufacture (see 14.1).
4. Materials and Manufacture
4.1 The base metal shall be steel produced by the open-hearth, electric-furnace, or basic-oxygen process and shall be of such
composition that the finished clad wire shall have the properties and characteristics prescribed in this specification.
4.2 The aluminum used for cladding shall have a purity and quantity sufficient to meet thickness and resistance requirements
of this specification (see 7.1 and 9.1).
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
CompositeBi-Metallic Conductors.
Current edition approved April 1, 2010. Published May 2010. Originally approved in 1970. Last previous edition approved in 2007 as B502 – 02 (2007). DOI:
10.1520/B0502_B0502M-10E01.10.1520/B0502_B0502M-10E02.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
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B502/B502M − 10
TABLE 1 Tensile Requirements for Normal Strength (AW2) For
ACSR/AW2, ACSR/TW/AW2 and ACSS/AW2, ACSR/TW/AW2 Type
Conductors
Nominal Stress at 1.0 % Ultimate Tensile Elongation,
Diameter, Extension min, Strength, min, min, %, 10 in.
in. [mm] psi (MPa) psi (MPa) [250 mm]
0.0770 to 0.1289 175 000 (1206) 195 000 (1344) 1.5
[1.956 to 3.274], incl
0.1290 to 0.1369 170 000 (1172) 190 000 (1310) 1.5
[3.275 to 3.477], incl
0.1370 to 0.1443 165 000 (1137) 185 000 (1275) 1.5
[3.478 to 3.665], incl
0.1444 to 0.1549 160 000 (1103) 180 000 (1241) 1.5
[3.666 to 3.934], incl
0.1550 to 0.1620 160 000 (1103) 175 000 (1206) 1.5
[3.935 to 4.115], incl
0.1621 to 0.1729 155 000 (1068) 170 000 (1172) 1.5
[4.116 to 4.392], incl
0.1730 to 0.1819 150 000 (1034) 165 000 (1137) 1.5
[4.393 to 4.620], incl
0.1820 to 0.1880 145 000 (1000) 160 000 (1103) 1.5
[4.621 to 4.775], incl
TABLE 2 Tensile Requirements for High Strength (AW3) For
ACSS/AW3 and ACSS/TW/AW3 Type conductorsConductors
Nominal Stress at 1.0 % Ultimate Tensile Elongation,
Diameter, Extension min, Strength, min, min, %, 10 i
...
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