ASTM B501-10

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 and health practices and determine the applicability of regulatory limitations prior to use. (CautionConsideration should be given to toxicity and flammability when selecting solvent cleaners.)

General Information

• Status: Historical
• Publication Date: 31-Mar-2010
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaces: ASTM B501-04 - Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 01-Apr-2010
• Replaced By: ASTM B501-10(2015) - Standard Specification for Silver-Coated, Copper-Clad Steel Wire for Electronic Application
• Effective Date: 01-Apr-2015

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:B501 −10
StandardSpecification 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 Department of Defense.
2
1. Scope 2.2 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor
1.1 This specification covers silver-coated, round, copper-
Materials
clad steel wire for electronic application.
B258 Specification for Nominal Diameters and Cross-
1.2 Silver coatings in mass percentages of the total mass of
SectionalAreasofAWGSizesofSolidRoundWiresUsed
the coated wire are as follows: 1.25, 2.5, 4.0, 6.1, and 8.0.
as Electrical Conductors
1.2.1 Silver-coated wire having different minimum percent-
B452 Specification for Copper-Clad Steel Wire for Elec-
age of silver by mass may be obtained by mutual agreement
tronic Application
between the manufacturer and the purchaser. For information
purposes, the thickness of coating in microinches provided by
3. Terminology
the mass percentages listed in 1.2 is shown in Table 1.
3.1 Definitions of Terms Specific to This Standard:
1.3 Four classes of copper-clad steel wire are covered as
3.1.1 lot—any amount of wire of one class and size pre-
follows: Class 30HS nominal 30 % conductivity hard-drawn,
sented for acceptance at one time, such amount, however, not
Class 30A nominal 30 % conductivity annealed, Class 40HS
to exceed 10 000 lb (4500 kg) (Note 1).
nominal 40 % conductivity hard-drawn, and Class 40A nomi-
3.1.2 sample—a quantity of production units (coils, reels,
nal 40 % conductivity annealed.
and so forth) selected at random from the lot for the purpose of
1.4 The values stated in inch-pound units are to be regarded
determining conformance of the lot to the requirements of this
as standard. The values given in parentheses are mathematical specification.
conversions to SI units that are provided for information only
3.1.3 specimen—a length of wire removed for test purposes
and are not considered standard.
from any individual production unit of the sample.
1.4.1 Exception—In resistivity the SI units are to be re-
NOTE 1—Alot should comprise material taken from a product regularly
garded as the standard
meeting the requirements of this specification. Inspection of individual
1.5 The following safety hazards caveat pertains to the test
lots of less than 500 lb (250 kg) of wire cannot be justified economically.
method described in this specification. This standard does not For small lots of 500 lb (250 kg) or less, the purchaser may agree to the
manufacturer’sregularinspectionoftheproductasawholeasevidenceof
purport to address all of the safety problems, if any, associated
acceptability of such small lots.
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and
4. Ordering Information
determine the applicability of regulatory limitations prior to
4.1 Orders for material under this specification shall include
use. (Caution—Consideration should be given to toxicity and
the following information:
flammability when selecting solvent cleaners.)
4.1.1 Quantity of each size,
2. Referenced Documents
4.1.2 Wire size (see 7.1 and Table 1),
4.1.3 Class of basis wire (see 1.3),
2.1 The following documents of the issue in effect on date
4.1.4 Mass percentage of coating (see 1.2 and Table 1),
of material purchase form a part of this specification to the
4.1.5 Package size (see Section 12),
extent referenced herein:
4.1.6 Special packaging marking, if required, and
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
Composite Conductors. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2010. Published May 2010. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1969. Last previous edition approved in 2004 as B501 – 04. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0501-10. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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B501−10
TABLE 1 Silver Mass Percent and Thickness of Coating
Thickness of Silver, µin.
Diameter Cross-Sectional Area at 20°C
(for information only)
1.25 2.5 4.0 6.1 8.0
2 2
in. mm cmil in. mm
% % % % %
0.0720 1
...

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:B501–04 Designation: B501 – 10
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 Department of Defense.
1. 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.
1.4The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only except for resistivity, where the SI units are to be regarded as the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
(Caution—Consideration should be given to toxicity and flammability when selecting solvent cleaners.)
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
B258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Used as Electrical
Conductors
B452 Specification for Copper-Clad Steel Wire for Electronic Application
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 lot—any amount of wire of one class and size presented for acceptance at one time, such amount, however, not to exceed
10 000 lb (4500 kg) (Note 1).
3.1.2 sample—a quantity of production units (coils, reels, and so forth) selected at random from the lot for the purpose of
determining conformance of the lot to the requirements of this specification.
3.1.3 specimen—a length of wire removed for test purposes from any individual production unit of the sample.
NOTE 1—A lot should comprise material taken from a product regularly meeting the requirements of this specification. Inspection of individual lots
of less than 500 lb (250 kg) of wire cannot be justified economically. For small lots of 500 lb (250 kg) or less, the purchaser may agree to the
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on Composite
Conductors.
Current edition approved Sept.April 1, 2004.2010. Published September 2004.May 2010. Originally approved in 1969. Last previous edition approved in 19992004 as
B509–99.B501 – 04. DOI: 10.1520/B0501-104.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B501 – 10
TABLE 1 Silver Mass Percent and Thickness of Coating
Thickness of Silver, µin.
Diameter Cross-Sectional Area at
...