ASTM B3-95
(Specification)Standard Specification for Soft or Annealed Copper Wire
Standard Specification for Soft or Annealed Copper Wire
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.
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: B 3 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
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Soft or Annealed Copper Wire
This standard is issued under the fixed designationB3;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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
1. Scope 3.1.3 Type of copper, if special (Section 4),
3.1.4 Package size (see 10.1),
1.1 This specification covers drawn and annealed or soft
3.1.5 Special package marking, if required, and
round bare copper wire for electrical purposes (Explanatory
3.1.6 Place of inspection (see 9.1).
Note 1).
3.2 In addition, Supplementary Requirements shall apply
1.2 The SI values for density and resistivity are to be
only when specified by the purchaser in the inquiry, contract, or
regarded as the standard. For all other properties the inch-
purchase order for direct procurement by agencies of the U.S.
pound values are to be regarded as the standard and the SI units
Government (S1, S2, and S3).
may be approximate.
1.3 The hazard statement applies only to Section 6, Test
4. Materials and Manufacture
Methods, of this specification. This standard does not purport
4.1 The material shall be copper of such quality and purity
to address all of the safety concerns, if any, associated with its
that the finished product shall have the properties and charac-
use. It is the responsibility of the user of this standard to
teristics prescribed in this specification.
establish appropriate safety and health practices and deter-
NOTE 1—The following standards define the materials suitable for use:
mine the applicability of regulatory limitations prior to use.
Specification B 49.
2. Referenced Documents
4.2 Copper bars of special qualities, forms, or types, as may
2.1 The following documents of the issue in effect at the
be agreed upon between the manufacturer and the purchaser,
time of reference form a part of this specification to the extent
and which will conform to the requirements prescribed in this
referenced herein:
specification may also be used.
2.2 ASTM Standards:
5. General Requirements (see Section 7)
B 49 Specification for Copper Redraw Rod for Electrical
2
5.1 Tensile Strength and Elongation—The wire shall con-
Purposes
form to the requirements for elongation prescribed in Table 1
B 193 Test Method for Resistivity of Electrical Conductor
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(Explanatory Note 2). No requirements for tensile strength are
Materials
specified. For wire whose nominal diameter is more than 0.001
B 258 Specification for Standard Nominal Diameters and
in. (1 mil) (0.025 mm) greater than a size listed in Table 1, but
Cross-Sectional Areas of AWG Sizes of Solid Round Wires
3 less than that of the next larger size, the requirements of the
Used as Electrical Conductors
next larger size shall apply.
2.3 National Institute of Standards and Technology:
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5.2 Joints—Necessary joints in the completed wire and in
NBS Handbook 100— Copper Wire Tables
the wire and rods prior to final drawing shall be made in
3. Ordering Information
accordance with the best commercial practice.
3.1 Orders for material under this specification shall include 5.3 Resistivity—The electrical resistivity 20°C shall not
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exceed 875.20 V·lb/mile .
the following information:
3.1.1 Quantity of each size, 5.4 Dimensions and Permissible Variations—The wire sizes
shall be expressed as the diameter of the wire in decimal
3.1.2 Wire size: diameter in inches (see 5.4 and Table 1),
fractions of an inch to the nearest 0.1 mil (0.0001 in.) (0.0025
mm) (Explanatory Note 3). For diameters under 0.0100 in.
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This specification is under the jurisdiction of ASTM Committee B-1 on Wires
(0.2540 mm), the wire shall not vary from the specified
for Electrical Conductorsand is the direct responsibility of Subcommittee B01.04on
diameter by more than plus and minus 0.1 mil (0.0001 in.), and
Conductors of Copper and Copper Alloys.
for diameters of 0.0100 in. and over the wire shall not vary
Current edition approved April 15, 1995. Published June 1995. Originally
published as B 3 – 12. Last previous edition B3–90.
from the specified diameter by more than plus and minus 1 %,
2
Annual Book of ASTM Standards, Vol 02.01.
expressed to the nearest 0.1 mil (0.0001 in.).
3
Annual Book of ASTM Standards, Vol 02.03.
4
5.5 Finish—The wire shall be free of all imperfections not
Avail
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