ASTM B3-01(2007)
(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 or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification. For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units. For conductor sizes designation by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B3 −01(Reapproved 2007)
Standard Specification for
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 Department of Defense.
1. Scope 2.3 National Institute of Standards and Technology:
NBS Handbook 100—Copper Wire Tables
1.1 This specification covers drawn and annealed or soft
roundbarecopperwireforelectricalpurposes(seeExplanatory
3. Ordering Information
Note 1).
3.1 Orders for material under this specification shall include
1.2 The values stated in inch-pound or SI units are to be
the following information:
regarded separately as standard. Each system shall be used
3.1.1 Quantity of each size,
independently of the other. Combining values from the two
3.1.2 Wire size: diameter in inches (see 5.4 and Table 1),
systems may result in non-conformance with the specification.
3.1.3 Type of copper, if special (Section 4),
For conductor sizes designated by AWG or kcmil sizes, the
3.1.4 Package size (see 10.1),
requirements in SI units are numerically converted from the
3.1.5 Special package marking, if required, and
correspondingrequirementsininch-poundunits.Forconductor
3.1.6 Place of inspection (see 9.1).
sizes designation by AWG or kcmil, the requirements in SI
units have been numerically converted from corresponding
4. Materials and Manufacture
values stated or derived in inch-pound units. For conductor
4.1 The material shall be copper of such quality and purity
sizesdesignatedbySIunitsonly,therequirementsarestatedor
that the finished product shall have the properties and charac-
derived in SI units.
teristics prescribed in this specification.
1.2.1 For density, resistivity and temperature, the values
stated in SI units are to be regarded as standard.
NOTE 1—The following standards define the materials suitable for use:
Specification B49.
2. Referenced Documents
4.2 Copper bars of special qualities, forms, or types, as may
be agreed upon between the manufacturer and the purchaser,
2.1 The following documents of the issue in effect at the
and which will conform to the requirements prescribed in this
time of reference form a part of this specification to the extent
specification may also be used.
referenced herein:
2.2 ASTM Standards:
5. General Requirements (see Section 7)
B49 Specification for Copper Rod Drawing Stock for Elec-
5.1 Tensile Strength and Elongation—The wire shall con-
trical Purposes
form to the requirements for elongation prescribed in Table 1
B193 Test Method for Resistivity of Electrical Conductor
(see Explanatory Note 2). No requirements for tensile strength
Materials
are specified. For wire whose nominal diameter is more than
B258 Specification for Nominal Diameters and Cross-
0.001 in. (0.025 mm) greater than a size listed in Table 1, but
SectionalAreasofAWGSizesofSolidRoundWiresUsed
less than that of the next larger size, the requirements of the
as Electrical Conductors
next larger size shall apply.
5.2 Joints—Necessary joints in the completed wire and in
1 the wire and rods prior to final drawing shall be made in
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductorsand is the direct responsibility of Subcommittee B01.04 on accordance with the best commercial practice.
Conductors of Copper and Copper Alloys.
5.3 Resistivity—The electrical resistivity 20°C shall not
Current edition approved March 15, 2007. Published April 2007. Originally
2 2
approved in 1912. Last previous edition approved in 2001 as B3 – 01. DOI: exceed 875.20Ω·lb/mile (0.15328Ω·g/m ).
10.1520/B0003-01R07.
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’s Document Summary page on Available from the National Technical Information Service, 5285 Port Royal
the ASTM website. Rd, Springfield, VA 22161.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B3−01 (2007)
TABLE 1 Tensile Requirements
Diameter Area at 20°C Elongation in
2 2
in. mm cmils in. mm 10 in.
(254 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 0.00323 2.08 25
0.0571 1.450 3 260 0.00256 1.65 25
0.0508 1.290 2 580 0.00203 1.31 25
0.0453 1.151 2 050 0.00161 1.04 25
0.0403 1.024 1 620 0.00128 0.823 25
0.0359 0.912 1 290 0.00101 0.654 25
0.0320 0.813 1 020 0.000804 0.517 25
0.0285 0.724 812 0.000638 0.411 25
0.0253 0.643 640 0.000503 0.324 25
0.0226 0.574 511 0.000401 0.259 25
0.0201 0.511 404 0.000317 0.205 20
0.0179 0.455 320 0.000252 0.162 20
0.0159 0.404 253 0.000199 0.128 20
0.0142 0.361 202 0.000158 0.102 20
0.0126 0.320 159 0.000125 0.081 20
0.0113 0.287 128 0.000100 0.065 20
0.0100 0.254 100 0.0000785 0.051 15
0.0089 0.226 79.2 0.0000622 0.040 15
0.0080 0.203 64.0 0.0000503 0.032 15
0.0071 0.180 50.4 0.0000396 0.026 15
0.0063 0.160 39.7 0.0000312 0.020 15
0.0056 0.142 31.4 0.0000246 0.016 15
0.0050 0.127 25.0 0.0000196 0.013 15
0.0045 0.114 20.2 0.000 0159 0.010 15
0.0040 0.102 16.0 0.0000126 0.0081 15
0.0035 0.089 12.2 0.00000962 0.0062 15
0.0031 0.079 9.61 0.00000755 0.0049 15
5.4 DimensionsandPermissibleVariations—The wire sizes measured between gage marks placed originally 10 in. (254
shall be expressed as the diameter of the wire in decimal mm) apart upon the test specimen (see Explanatory Note 4).
fractions of an inch to the nearest 0.0001 in. (0.001 mm) The elongation of wire whose nominal diameter is 0.0808 in.
(0.0025 mm) (see Explanatory Note 3). For diameters under (2.052 mm) and under may be determined as described above
0.0100 in. (0.2540 mm), the wire shall not vary from the or by measurements made between the jaws of the testing
specified diameter by more than plus and minus 0.0001 in. machine. When the latter method is used, the zero length shall
(0.0025 mm), and for diameters of 0.0100 in. and over the wire be the distance between the jaws at the start of the tension test
shall not vary from the specified diameter by more than plus and be as near 10 in. (254 mm) as practicable, and the final
andminus1 %,expressedtothenearest0.0001in.(0.001mm). length shall be the distance between the jaws at the time of
rupture. The fracture shall be between gage marks in the case
5.5 Finish—The wire shall be free of all imperfections not
of specimens so marked or between the jaws of the testing
consistent with the best commercial practice.
machine and not closer than 1 in. (25.4 mm) to either gage
mark or either jaw.
6. Test Methods
6.1 Tensile Strength and Elongation—No test for tensile 6.2 Resistivity—Determine the electrical resistivity of the
strength shall be required. material in accordance with Test Method B193 (see Explana-
6.1.1 Determine the elongation of wire whose nominal tory Note 5). The purchaser may accept certification that the
diameterislargerthan0.0808in.(2.052mm)indiameterasthe wire was drawn from stock meeting the International Standard
permanent increase in length, expressed in percent of the forAnnealed Copper instead of resistivity tests on the finished
original length, due to the breaking of the wire in tension, wire.
B3−01 (2007)
6.3 Dimensional Measurements—Make dimensional mea- Failure to meet these requirements shall constitute failure to
surements with a micrometer caliper equipped with a vernier meet the resistivity conformance criterion.
graduated in 0.0001 in. (0.001 mm). Take measurements on at 7.1.3 Dimensions—The dimensions of the first sample
least three places on each unit selected for this test. If (Table 2) shall conform to the requirements of 5.4. If there are
accessible,takeonemeasurementoneachendandonenearthe no failures, the lot conforms to this requirement. If there are
middle.Theaverageofthethreemeasurementsshalldetermine failures but the number of these does not exceed the allowable
compliance with the requirements. defect number, c (Table 2), for the respective number of units
in the sample, a second sample equal to n shall be taken and
6.4 Surface Finish—Make a surface-finish inspection with
the total defects of the n plus n units shall not exceed the
1 2
the unaided eye (normal spectacles acceptable).
allowable defect number, c . Failure to meet this requirement
shall constitute failure to meet the dimensional conformational
7. Conformance Criteria (see Explanatory Note 6)
criterion.
7.1 Any lot of wire, the samples of which comply with the
7.1.4 Surface Finish—The surface finish of the samples
conformance criteria of this section, shall be considered as
taken in accordance with Table 3 shall conform to the require-
complying with the requirements of Section 5. Individual
ments of 5.5. The number of units in the sample showing
production units that fail to meet one or more of the require-
surface defects not consistent with commercial practice shall
ments shall be rejected. Failure of a sample group from a lot to
not exceed the allowable defect number, c,in Table 3. Failure
meet one or more of the following criteria shall constitute
to meet this requirement shall constitute failure to meet the
causeforrejectionofthelot.Theconformancecriteriaforeach
surface-finish conformance criterion.
of the prescribed properties given in Section 5 are as follows:
7.1.5 Packaging—Conformance to the packaging require-
7.1.1 Elongation—Thelotshallbeconsideredconformingif
ments specified
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