ASTM B501-10(2019)
(Specification)Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
ABSTRACT
This specification deals with silver-coated, round, copper-clad steel wires for electronic applications. The four classes of steel wires covered here are Classes 30HS, 30A, 40HS, and 40A. Specimens shall undergo tests that shall evaluate their conformance to the following physical properties: tensile strength, elongation, electrical resistivity, continuity and mass of the coating, and dimensions and density of the wire.
SCOPE
1.1 This specification covers silver-coated, round, copper-clad steel wire for electronic application.
1.2 Silver coatings in mass percentages of the total mass of the coated wire are as follows: 1.25, 2.5, 4.0, 6.1, and 8.0.
1.2.1 Silver-coated wire having different minimum percentage of silver by mass may be obtained by mutual agreement between the manufacturer and the purchaser. For information purposes, the thickness of coating in microinches provided by the mass percentages listed in 1.2 is shown in Table 1.
1.3 Four classes of copper-clad steel wire are covered as follows: Class 30HS nominal 30 % conductivity hard-drawn, Class 30A nominal 30 % conductivity annealed, Class 40HS nominal 40 % conductivity hard-drawn, and Class 40A nominal 40 % conductivity annealed.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4.1 Exception—In resistivity the SI units are to be regarded as the standard.
1.5 The following safety hazards caveat pertains to the test method described in this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Consideration should be given to toxicity and flammability when selecting solvent cleaners.)
1.6 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
Relations
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: B501 −10 (Reapproved 2019)
Standard Specification for
Silver-Coated, Copper-Clad Steel Wire for Electronic
1
Application
This standard is issued under the fixed designation B501; 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 mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers silver-coated, round, copper-
clad steel wire for electronic application.
2. Referenced Documents
1.2 Silver coatings in mass percentages of the total mass of
2.1 The following documents of the issue in effect on date
the coated wire are as follows: 1.25, 2.5, 4.0, 6.1, and 8.0.
of material purchase form a part of this specification to the
1.2.1 Silver-coated wire having different minimum percent-
extent referenced herein:
age of silver by mass may be obtained by mutual agreement
2
2.2 ASTM Standards:
between the manufacturer and the purchaser. For information
B193 Test Method for Resistivity of Electrical Conductor
purposes, the thickness of coating in microinches provided by
Materials
the mass percentages listed in 1.2 is shown in Table 1.
B258 Specification for Standard Nominal Diameters and
1.3 Four classes of copper-clad steel wire are covered as
Cross-Sectional Areas of AWG Sizes of Solid Round
follows: Class 30HS nominal 30 % conductivity hard-drawn,
Wires Used as Electrical Conductors
Class 30A nominal 30 % conductivity annealed, Class 40HS
B452 Specification for Copper-Clad Steel Wire for Elec-
nominal 40 % conductivity hard-drawn, and Class 40A nomi-
tronic Application
nal 40 % conductivity annealed.
3. Terminology
1.4 The values stated in inch-pound units are to be regarded
3.1 Definitions of Terms Specific to This Standard:
as standard. The values given in parentheses are mathematical
3.1.1 lot—any amount of wire of one class and size pre-
conversions to SI units that are provided for information only
sented for acceptance at one time, such amount, however, not
and are not considered standard.
to exceed 10 000 lb (4500 kg) (Note 1).
1.4.1 Exception—In resistivity the SI units are to be re-
garded as the standard.
3.1.2 sample—a quantity of production units (coils, reels,
and so forth) selected at random from the lot for the purpose of
1.5 The following safety hazards caveat pertains to the test
determining conformance of the lot to the requirements of this
method described in this specification. This standard does not
specification.
purport to address all of the safety problems, if any, associated
with its use. It is the responsibility of the user of this standard
3.1.3 specimen—a length of wire removed for test purposes
to establish appropriate safety, health, and environmental
from any individual production unit of the sample.
practices and determine the applicability of regulatory limita-
NOTE 1—Alot should comprise material taken from a product regularly
tions prior to use. (Warning—Consideration should be given
meeting the requirements of this specification. Inspection of individual
to toxicity and flammability when selecting solvent cleaners.)
lots of less than 500 lb (250 kg) of wire cannot be justified economically.
1.6 This international standard was developed in accor- For small lots of 500 lb (250 kg) or less, the purchaser may agree to the
manufacturer’sregularinspectionoftheproductasawholeasevidenceof
dance with internationally recognized principles on standard-
acceptability of such small lots.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Ordering Information
4.1 Orders for material under this specification shall include
the following information:
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
2
Bi-Metallic Conductors. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2019. Published October 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1969. Last previous edition approved in 2015 as B501 – 10 (2015). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/B0501-10R19. the ASTM website.
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