ASTM B452-22

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 high-strength hard-drawn,  
1.2.2 Class 30HS-A—Nominal 30 % conductivity high-strength annealed,  
1.2.3 Class 40HS—Nominal 40 % conductivity high-strength hard-drawn, and  
1.2.4 Class 40HS-A—Nominal 40 % conductivity high-strength 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.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Apr-2022
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B452 −22
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 U.S. Department of Defense.
2
1. Scope Wires Used as Electrical Conductors
3
2.3 NIST Documents:
1.1 This specification covers bare round copper-clad steel
NBS Handbook 100—Copper Wire Tables
wire for electronic application.
1.2 Four classes of copper-clad steel wire are covered as
3. Ordering Information
follows:
3.1 Orders for material under this specification shall include
1.2.1 Class 30HS—Nominal 30 % conductivity high-
the following information:
strength hard-drawn,
3.1.1 Quantity of each size and class,
1.2.2 Class 30HS-A—Nominal 30 % conductivity high-
3.1.2 Wire size, diameter in inches (see 5.3 and Table 1),
strength annealed,
3.1.3 Class of wire (see 1.2 and Table 1),
1.2.3 Class 40HS—Nominal 40 % conductivity high-
3.1.4 Packaging and shipping (Section 10),
strength hard-drawn, and
3.1.5 If inspection is required (see 6.3.3), and
1.2.4 Class 40HS-A—Nominal 40 % conductivity high-
3.1.6 Place of inspection (see 6.1).
strength annealed.
1.3 The values stated in inch-pound units are to be regarded 4. Material
as the standard.The values given in parentheses are in SI units.
4.1 The wire shall consist of a core of homogeneous
1.4 This international standard was developed in accor-
open-hearth, electric-furnace, or basic-oxygen high-strength
dance with internationally recognized principles on standard- steel with a continuous outer cladding of copper thoroughly
ization established in the Decision on Principles for the
bonded to the core throughout and shall be of such quality as
Development of International Standards, Guides and Recom- to meet the requirements of this specification (Note 1).
mendations issued by the World Trade Organization Technical
NOTE 1—The copper-clad steel wire provides a high-strength conductor
Barriers to Trade (TBT) Committee.
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. Referenced Documents ity is less pronounced due to concentration of the current in the outer
periphery of the wire. Minimum thickness of 6 % and 10 % of the radius
2.1 The following documents of the issue in effect on the
for 30 and 40 % conductivity material, respectively, has been established
date of material purchase form a part of this specification to the
to facilitate the inspection of thickness on fine wires.
extent referenced herein:
5. General Requirements
2
2.2 ASTM Standards:
5.1 Tensile Strength and Elongation—The copper-clad steel
B193 Test Method for Resistivity of Electrical Conductor
2
wire shall conform to the tensile strength and elongation
Materials
requirements of Table 1. For intermediate sizes not listed in
B258 Specification for Standard Nominal Diameters and
Table 1, the elongation requirements of the next smaller size
Cross-Sectional Areas of AWG Sizes of Solid Round
shall apply; in the case of tensile strength, the requirements of
the next larger size shall apply.
1
This specification is under the jurisdiction of ASTM Committee B01 on
5.2 Resistivity—The electrical resistivity at a temperature of
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
20 °C shall not exceed the values prescribed in Table 2. See
Bi-Metallic Conductors.
Note 2 for calculating electrical resistance.
Current edition approved May 1, 2022. Published May 2022. Originally
approved in 1967. Last previous edition approved in 2015 as B452 – 09 (2015).
NOTE 2—Relationships which may be useful in connection with the
DOI: 10.1520/B0452-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from National Institute of Standards and Technology (NIST), 100
the ASTM website. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B452−22
TABLE 1 Tensile and Elongation Requirements
Elongation, min.
Tensil
...

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.
Designation: B452 − 09 (Reapproved 2015) B452 − 22
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 U.S. Department of Defense.
1. 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 high-strength hard-drawn,
1.2.2 Class 30A—30HS-A—Nominal 30 % conductivity high-strength annealed,
1.2.3 Class 40HS—Nominal 40 % conductivity high-strength hard-drawn, and
1.2.4 Class 40A—40HS-A—Nominal 40 % conductivity high-strength 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.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 The following documents of the issue in effect on the date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
2
B193 Test Method for Resistivity of Electrical Conductor Materials
B258 Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as
2
Electrical Conductors
3
2.3 National Institute of Standards and Technology:NIST Documents:
NBS Handbook 100—Copper Wire Tables
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on Bi-Metallic
Conductors.
Current edition approved April 1, 2015May 1, 2022. Published April 2015May 2022. Originally approved in 1967. Last previous edition approved in 20092015 as
B452 – 09.B452 – 09 (2015). DOI: 10.1520/B0452-09R15.10.1520/B0452-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B452 − 22
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size and class,
3.1.2 Wire size, diameter in inches (see 5.3 and Table 1),
3.1.3 Class of wire (see 1.2 and Table 1),
3.1.4 Packaging and shipping (Section 10),
3.1.5 If inspection is required (see 6.3.3), and
3.1.6 Place of inspection (see 6.1).
4. Material
4.1 The wire shall consist of a core of homogeneous open-hearth, electric-furnace, or basic-oxygen high-strength steel with a
continuous outer cladding of copper thoroughly bonded to the core throughout and shall be of such quality as to meet the
requirements of this specification (Note 1).
TABLE 1 Tensile and Elongation Requirements
Elongation, min.
Tensile Strength, min
Diameter Cross-Sectional Area at 20°C20 °C % in 10 in.
2
psi (kgf/mm )
(250 mm)
Class Class
Class 30HS, Class 30A, Class 40HS, Class 40A, 30HS 30A30HS-A
2 2
in. mm cmil in. mm
min30HS min30HS-A min40HS min40HS-A and and
40HS 40A40HS-A
0.0720 1.83 5180 0.00407 2.63 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.5 15
0.0641 1.63 4110 0.00323 2.08 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.5 15
0.0571 1.45 3260 0.00256 1.65 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.5 15
0.0508 1.29 2580 0.00203 1.31 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.5 15
0.0453 1.15 2050 0.00161 1.04 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.5 15
0.0403 1.02 1620 0.00128 0.823 127 000 (89.3) 50 000 (35.2) 110 000 (77.3) 45 000 (31.6) 1.0 15
0.0359
...