ASTM B2-12e1

Standard Specification for Medium-Hard-Drawn Copper Wire

ABSTRACT
This specification covers medium-hard-drawn round copper wire for electrical purposes. The material shall be copper of such quality and purity that the finished product shall have the properties and characteristics prescribed. Tensile test and electrical resistivity test shall be made to conform to the requirements specified.
SCOPE
1.1 This specification covers medium-hard-drawn round 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—The SI values of density and resistivity 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 14-Nov-2012
• ICS: 77.150.30 - Copper products
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B2-12 - Standard Specification for Medium-Hard-Drawn Copper Wire
• Effective Date: 15-Nov-2012
• Replaced By: ASTM B2-13 - Standard Specification for Medium-Hard-Drawn Copper Wire
• Effective Date: 01-Oct-2013
• Referred By: ASTM B258-18 - Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• Effective Date: 15-Nov-2012
• Referred By: ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
• Effective Date: 15-Nov-2012
• Referred By: ASTM B787/B787M-04(2020) - Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
• Effective Date: 15-Nov-2012
• Referred By: ASTM F68-16 - Standard Specification for Oxygen-Free Copper in Wrought Forms for Electron Devices
• Effective Date: 15-Nov-2012
• Referred By: ASTM B902/B902M-13(2018) - Standard Specification for Compressed Round Stranded Copper Conductors, Hard, Medium-Hard, or Soft Using Single Input Wire Construction
• Effective Date: 15-Nov-2012
• Referred By: ASTM B193-20 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 15-Nov-2012

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
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Designation:B2 −12
StandardSpecification for
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Medium-Hard-Drawn Copper Wire
This standard is issued under the fixed designation B2; 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.
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ε NOTE—Footnote 3 was editorially updated in February 2013.
1. Scope as Electrical Conductors
2.3 Other Documents:
1.1 This specification covers medium-hard-drawn round
NBS Handbook 100 Copper Wire Tables of the National
copper wire for electrical purposes (see Explanatory Note 1).
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Bureau of Standards
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3. Ordering Information
conversions to SI units that are provided for information only
3.1 Orders for material under this specification should
and are not considered standard.
include the following information:
1.2.1 Exception—The SI values of density and resistivity
3.1.1 Quantity of each size;
are to be regarded as standard.
3.1.2 Wire size: diameter in inches (see 5.1 and Table 1);
1.3 This standard does not purport to address all of the
3.1.3 Type of copper, if special (see Section 4);
safety concerns, if any, associated with its use. It is the
3.1.4 Package size (see 11.1);
responsibility of the user of this standard to establish appro-
3.1.5 Special package marking, if required; and
priate safety and health practices and determine the applica-
3.1.6 Place of inspection (Section 10).
bility of regulatory limitations prior to use.
4. Materials and Manufacture
2. Referenced Documents
4.1 The material shall be copper of such quality and purity
2.1 The following documents of the issue in effect on date
that the finished product shall have the properties and charac-
of material purchase form a part of this specification to the
teristics prescribed in this specification.
extent referenced herein:
NOTE1—SpecificationsB5,B49,andB170definethematerialssuitable
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2.2 ASTM Standards:
for use.
B5 Specification for High Conductivity Tough-Pitch Copper
4.2 Copper bars of special qualities, forms, or types, as may
Refinery Shapes
be agreed upon between the manufacturer and the purchaser,
B49 Specification for Copper Rod Drawing Stock for Elec-
and which will conform to the requirements prescribed in this
trical Purposes
specification, may also be used.
B170 Specification for Oxygen-Free Electrolytic Copper—
Refinery Shapes
5. Dimensions and Permissible Variations
B193 Test Method for Resistivity of Electrical Conductor
5.1 The wire sizes shall be expressed as the diameter of the
Materials
wire in decimal fractions of an inch to the nearest 0.0001 in.
B258 Specification for Nominal Diameters and Cross-
(0.1 mil) or in millimetres to the nearest 0.001 mm (Explana-
SectionalAreasofAWGSizesofSolidRoundWiresUsed
tory Note 2).
5.2 Within the range of diameters included in Table 1 the
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This specification is under the jurisdiction of ASTM Committee B01 on
wire shall not vary from the specified diameter by more than
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
61 %, expressed to the nearest 0.0001 in. (0.1 mil) 0.001 mm.
Conductors of Copper and Copper Alloys.
Current edition approved Nov. 15, 2012. Published November 2012. Originally
5.3 Ten percent, but not less than five coils or spools (or all
approved in 1912. Last previous edition approved in 2008 as B2 – 08. DOI:
if the lot is less than five) from any lot of wire shall be gaged
10.1520/B0002-12E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
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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.
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B2−12
TABLE 1 Tensile Requirements
Diameter Area at 20°C Tensile Strength Elongation, min,
%in 10-in.
2 2
in. mm cmil in. mm psi MPa
(250 mm)
Min Max Min Max
0.4600 11.684 211 600 0.1662 107.0 42 000 49 000 290 340 3.8
0.4096 10.404 167 800 0.1318 85.0 43 000 50 000 295 345 3.6
0.3648 9.266 133 100 0.1045 67.4 44 000 51 000 305 350 3.2
0.3249 8.252 105 600 0.08291 53.5 45 000 52 000 310 360 3.0
0.2893 7.348 83 690 0.06573 42.4 46 000 53 000 315 365 2.8
0.2576 6.543 66 360 0.05212 33.6 47 000 54 000 325 370 2
...