ASTM B452-02

Standard Specification for Copper-Clad Steel Wire for Electronic Application

ABSTRACT
This specification covers bare round copper-clad steel wire for electronic application. Four classes of copper-clad steel wire are covered as Class 30HS, 30A, 40HS, and 40A. The wire shall consist of a core of homogeneous open-hearth, electric-furnace, or basic-oxygen steel with a continuous outer cladding of copper thoroughly bonded to the core throughout. The copper-lad steel wire shall conform to the tensile strength and elongation requirements. Electrical resistivity test shall be performed at a specified temperature of each class of wire and shall not exceed the values prescribed in this specification. Dimensional measurements shall be made with a micrometer caliper and shall withstand torsion test without fracturing. Copper cladding to the steel of each of the four specimens shall conform to the adhesion criterion. Surface finish shall meet the required allowable number of defects.
SCOPE
1.1 This specification covers bare round copper-clad steel wire for electronic application.
1.2 Four classes of copper-clad steel wire are covered as follows:
1.2.1 Class 30HS—Nominal 30 % conductivity hard-drawn,
1.2.2 Class 30A—Nominal 30 % conductivity annealed,
1.2.3 Class 40—HSNominal 40 % conductivity hard-drawn, and
1.2.4 Class 40ANominal 40 % conductivity annealed.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are in SI units.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaces: ASTM B452-93(1998)E1 - Standard Specification for Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Replaced By: ASTM B452-09 - Standard Specification for Copper-Clad Steel Wire for Electronic Application
• Effective Date: 01-Oct-2009
• Referred By: ASTM B520-12(2017) - Standard Specification for Tin-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B501-10(2019) - Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002
• Referred By: ASTM B559-12(2017) - Standard Specification for Nickel-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 10-Apr-2002

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: B452 – 02
Standard Specification for
1
Copper-Clad Steel Wire for Electronic Application
This standard is issued under the fixed designation B452; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.1 Quantity of each size and class,
3.1.2 Wire size, diameter in inches (see 5.3 and Table 1),
1.1 This specification covers bare round copper-clad steel
3.1.3 Class of wire (see 1.2 and Table 1),
wire for electronic application.
3.1.4 Packaging and shipping (Section 10),
1.2 Four classes of copper-clad steel wire are covered as
3.1.5 If inspection is required (see 6.3.3), and
follows:
3.1.6 Place of inspection (see 6.1).
1.2.1 Class 30HS—Nominal 30 % conductivity hard-
drawn,
4. Material
1.2.2 Class 30A—Nominal 30 % conductivity annealed,
4.1 The wire shall consist of a core of homogeneous
1.2.3 Class 40HS—Nominal 40 % conductivity hard-
open-hearth, electric-furnace, or basic-oxygen steel with a
drawn, and
continuous outer cladding of copper thoroughly bonded to the
1.2.4 Class 40A—Nominal 40 % conductivity annealed.
core throughout and shall be of such quality as to meet the
1.3 The values stated in inch-pound units are to be regarded
requirements of this specification (Note 1).
as the standard.The values given in parentheses are in SI units.
NOTE 1—Thecopper-cladsteelwireprovidesahigh-strengthconductor
2. Referenced Documents
for use in wire and cable where greater strength is required and a lower
conductivity can be tolerated.At high frequencies the reduced conductiv-
2.1 The following documents of the issue in effect on the
ity is less pronounced due to concentration of the current in the outer
date of material purchase form a part of this specification to the
periphery of the wire. Minimum thickness of 6 % and 10 % of the radius
extent referenced herein:
for 30 and 40 % conductivity material, respectively, has been established
2
2.2 ASTM Standards:
to facilitate the inspection of thickness on fine wires.
B193 Test Method for Resistivity of Electrical Conductor
2
Materials 5. General Requirements
B258 Specification for Nominal Diameters and Cross-
5.1 Tensile Strength and Elongation—The copper-clad steel
SectionalAreas ofAWG Sizes of Solid Round Wires Used
wire shall conform to the tensile strength and elongation
as Electrical Conductors
requirements of Table 1. For intermediate sizes not listed in
2.3 National Institute of Standards and Technology:
Table 1, the elongation requirements of the next smaller size
3
NBS Handbook 100—Copper Wire Tables
shall apply; in the case of tensile strength, the requirements of
the next larger size shall apply.
3. Ordering Information
5.2 Resistivity—The electrical resistivity at a temperature of
3.1 Orders for material under this specification shall include
20°C shall not exceed the values prescribed in Table 2. See
the following information:
Note 2 for calculating electrical resistance.
NOTE 2—Relationships which may be useful in connection with the
1
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.
2
1
Standard (IACS) adopted by IEC in 1913, which is ⁄58 V·mm /m at 20°C
Current edition approved April 10, 2002. Published April 2002. Originally
2
for 100 % conductivity.The value of 0.017241 V·mm /m and the value of
´1
published as B452 – 67. Last previous edition B452 – 93(1998) . DOI: 10.1520/
2
0.15328 V·g/m at 20°C are respectively the international equivalent of
B0452-02.
2
volume and weight resistivity of annealed copper equal to 100 %
Annual Book of ASTM Standards, Vol 02.03.
3
conductivity. The latter term means that a copper wire 1 in. in length and
Available from the National Institute of Standards and Technology (NIST),
Gaithersburg, MD 20899. weighing 1 g would have a resistance of 0.15328 V. This is equivalent to
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B452 – 02
TABLE 1 Tensile and Elongation Requirements
Elongation, min.
2
Diameter Cross-Sectional Area at 20°C Tensile Strength, psi (kgf/mm ) %in10in.
(250 mm)
Class Class
2 2
in. mm cmil in. mm Class 30HS, min Class 30A, min Class 40HS, min Class 40A, min 30HS and 30A and
40HS 40A
0.0720 1.83 5180 0.00
...