ASTM B3-13(2018)
(Specification)Standard Specification for Soft or Annealed Copper Wire
Standard Specification for Soft or Annealed Copper Wire
ABSTRACT
This specification covers drawn and annealed or soft round bare copper wire for electrical purposes. The matterial shall be copper of such quality and purity that the finished product shall have the properties and characteristics prescribed. Tensile strength, elongation, and resistivity of the wires shall be determined. A micrometer caliper equipped with a vernier shall be used to measure the material dimensions. The wires shall be subjected to surface finish and shall conform to the particularized requirements.
SCOPE
1.1 This specification covers drawn and annealed or soft round bare copper wire for electrical purposes (see Explanatory Note 1).
1.2 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.
1.2.1 Exception—For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
1.3 This standard does not purport to address all of the safety concerns, 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.
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.
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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:B3 −13 (Reapproved 2018)
Standard Specification for
1
Soft or Annealed Copper Wire
This standard is issued under the fixed designation B3; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
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 Wires Used as Electrical Conductors
2.3 Other Standards:
1.1 This specification covers drawn and annealed or soft
3
NBS Handbook 100 —Copper Wire Tables
roundbarecopperwireforelectricalpurposes(seeExplanatory
Note 1).
3. Ordering Information
1.2 The values stated in inch-pound units are to be regarded
3.1 Orders for material under this specification shall include
as standard. The values given in parentheses are mathematical
the following information:
conversions to SI units that are provided for information only
3.1.1 Quantity of each size,
and are not considered standard.
3.1.2 Wire size: diameter in inches (see 5.3 and Table 1),
1.2.1 Exception—For density, resistivity and temperature,
3.1.3 Type of copper, if special (Section 4),
the values stated in SI units are to be regarded as standard.
3.1.4 Package size (see 10.1),
1.3 This standard does not purport to address all of the
3.1.5 Special package marking, if required, and
safety concerns, if any, associated with its use. It is the
3.1.6 Place of inspection (see 7.1).
responsibility of the user of this standard to establish appro-
4. Materials
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.1 The material shall be copper of such quality and purity
1.4 This international standard was developed in accor-
that the finished product shall have the properties and charac-
dance with internationally recognized principles on standard-
teristics prescribed in this specification.
ization established in the Decision on Principles for the
NOTE 1—Specification B49 defines copper suitable for use.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 4.2 Copper bars of special qualities, forms, or types, as may
Barriers to Trade (TBT) Committee. be agreed upon between the manufacturer and the purchaser,
and which will conform to the requirements prescribed in this
2. Referenced Documents
specification may also be used.
2.1 The following documents of the issue in effect at the
5. General Requirements (see Section 8)
time of reference form a part of this specification to the extent
referenced herein: 5.1 Tensile Strength and Elongation—The wire shall con-
2 form to the requirements for elongation prescribed in Table 1
2.2 ASTM Standards:
(see Explanatory Note 2). No requirements for tensile strength
B49 Specification for Copper Rod for Electrical Purposes
are specified. For wire whose nominal diameter is more than
B193 Test Method for Resistivity of Electrical Conductor
0.001 in. (0.025 mm) greater than a size listed in Table 1, but
Materials
less than that of the next larger size, the requirements of the
B258 Specification for Standard Nominal Diameters and
next larger size shall apply.
Cross-Sectional Areas of AWG Sizes of Solid Round
5.2 Resistivity—The electrical resistivity at 20°C shall not
2 2
exceed 875.20Ω·lb/mile (0.15328Ω·g/m ) (see Explanatory
1
This specification is under the jurisdiction of ASTM Committee B01 on
Note 5).
Electrical Conductorsand is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
5.3 Dimensions and Permissible Variations—The wire sizes
Current edition approved Oct. 1, 2018. Published October 2018. Originally
shall be expressed as the diameter of the wire in decimal
approved in 1912. Last previous edition approved in 2013 as B3 – 13. DOI:
fractionsofaninchtothenearest0.0001in.(or0.001mm)(see
10.1520/B0003-13R18.
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
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 ----------------------
B3−13 (2018)
TABLE 1 Tensile Requirements
Diameter
...
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: B3 − 13 (Reapproved 2018)
Standard Specification for
1
Soft or Annealed Copper Wire
This standard is issued under the fixed designation B3; 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 Wires Used as Electrical Conductors
2.3 Other Standards:
1.1 This specification covers drawn and annealed or soft
3
NBS Handbook 100 —Copper Wire Tables
round bare copper wire for electrical purposes (see Explanatory
Note 1).
3. Ordering Information
1.2 The values stated in inch-pound units are to be regarded
3.1 Orders for material under this specification shall include
as standard. The values given in parentheses are mathematical
the following information:
conversions to SI units that are provided for information only
3.1.1 Quantity of each size,
and are not considered standard.
3.1.2 Wire size: diameter in inches (see 5.3 and Table 1),
1.2.1 Exception—For density, resistivity and temperature,
3.1.3 Type of copper, if special (Section 4),
the values stated in SI units are to be regarded as standard.
3.1.4 Package size (see 10.1),
1.3 This standard does not purport to address all of the
3.1.5 Special package marking, if required, and
safety concerns, if any, associated with its use. It is the
3.1.6 Place of inspection (see 7.1).
responsibility of the user of this standard to establish appro-
4. Materials
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.1 The material shall be copper of such quality and purity
1.4 This international standard was developed in accor-
that the finished product shall have the properties and charac-
dance with internationally recognized principles on standard-
teristics prescribed in this specification.
ization established in the Decision on Principles for the
NOTE 1—Specification B49 defines copper suitable for use.
Development of International Standards, Guides and Recom-
4.2 Copper bars of special qualities, forms, or types, as may
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. be agreed upon between the manufacturer and the purchaser,
and which will conform to the requirements prescribed in this
2. Referenced Documents
specification may also be used.
2.1 The following documents of the issue in effect at the
5. General Requirements (see Section 8)
time of reference form a part of this specification to the extent
5.1 Tensile Strength and Elongation—The wire shall con-
referenced herein:
2 form to the requirements for elongation prescribed in Table 1
2.2 ASTM Standards:
(see Explanatory Note 2). No requirements for tensile strength
B49 Specification for Copper Rod for Electrical Purposes
are specified. For wire whose nominal diameter is more than
B193 Test Method for Resistivity of Electrical Conductor
0.001 in. (0.025 mm) greater than a size listed in Table 1, but
Materials
less than that of the next larger size, the requirements of the
B258 Specification for Standard Nominal Diameters and
next larger size shall apply.
Cross-Sectional Areas of AWG Sizes of Solid Round
5.2 Resistivity—The electrical resistivity at 20°C shall not
2 2
exceed 875.20 Ω·lb/mile (0.15328 Ω·g/m ) (see Explanatory
1
This specification is under the jurisdiction of ASTM Committee B01 on
Note 5).
Electrical Conductorsand is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
5.3 Dimensions and Permissible Variations—The wire sizes
Current edition approved Oct. 1, 2018. Published October 2018. Originally
shall be expressed as the diameter of the wire in decimal
approved in 1912. Last previous edition approved in 2013 as B3 – 13. DOI:
fractions of an inch to the nearest 0.0001 in. (or 0.001 mm) (see
10.1520/B0003-13R18.
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
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 ----------------------
B3 − 13 (2018)
TABLE 1 Tensile Requirements
Diameter Area at 20°C Elongation in
10 in.
(254 mm),
2 2
in. mm cmils in. mm
% min
0.4600 11.684 211 600 0.1662 107.0 35
0
...
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: B3 − 13 B3 − 13 (Reapproved 2018)
Standard Specification for
1
Soft or Annealed Copper Wire
This standard is issued under the fixed designation B3; 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 drawn and annealed or soft round bare copper wire for electrical purposes (see Explanatory Note
1).
1.2 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.
1.2.1 Exception—For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
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 at the time of reference form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B49 Specification for Copper Rod for Electrical Purposes
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
Electrical Conductors
2.3 Other Standards:
3
NBS Handbook 100 Copper—Copper Wire Tables
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 5.3 and Table 1),
3.1.3 Type of copper, if special (Section 4),
3.1.4 Package size (see 10.1),
3.1.5 Special package marking, if required, and
3.1.6 Place of inspection (see 7.1).
4. Materials
4.1 The material shall be copper of such quality and purity that the finished product shall have the properties and characteristics
prescribed in this specification.
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductorsand is the direct responsibility of Subcommittee B01.04 on Conductors
of Copper and Copper Alloys.
Current edition approved Oct. 1, 2013Oct. 1, 2018. Published October 2013October 2018. Originally approved in 1912. Last previous edition approved in 20122013 as
B3 – 12.B3 – 13. DOI: 10.1520/B0003-13.10.1520/B0003-13R18.
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.
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 ----------------------
B3 − 13 (2018)
TABLE 1 Tensile Requirements
Diameter Area at 20°C Elongation in
10 in.
(254 mm),
2 2
in. mm cmils in. mm
% min
Diameter Area at 20°C Elongation in
10 in.
(254 mm),
2 2
in. mm cmils in. mm
% min
0.4600 11.684 211 600 0.1662 107.0 35
0.4096 10.404 167 800 0.1318 85.0 35
0.3648 9.266 133 100 0.1045 67.4 35
0.3249 8.252 105 600 0.08291 53.5 35
0.2893 7.348 83 690 0.06573 42.4 30
0.2576 6.543 66 360 0.05212 33.6 30
0.2294 5.827 52 620 0.04133 26.7 30
0.2043 5.189 41 740 0.03278 21.2 30
0.1819 4.620 33 090 0.02599 16.8 30
0.1620 4.115 26 240 0.02061 13.3 30
0.1443 3.665 20 820 0.01635 10.5 30
0.1285 3.264 16 510 0.01297 8.37 30
0.1144 2.906 13 090 0.01028 6.63 30
0.1019 2.588 10 380 0.008155 5.26 25
0.0907 2.304 8 230 0.00646 4.17 25
0.0808 2.052 6 530 0.00513 3.31 25
0.0720 1.829 5 180 0.00407 2.63 25
0.0641 1.628 4 110 0
...
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