ASTM B2-08

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 SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound values are to be regarded as standard, and the SI units may be approximate.
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: 31-Mar-2008
• ICS: 77.150.30 - Copper products
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B2-00(2005)e1 - Standard Specification for Medium-Hard-Drawn Copper Wire
• Effective Date: 01-Apr-2008
• Replaced By: ASTM B2-12 - Standard Specification for Medium-Hard-Drawn Copper Wire
• Effective Date: 15-Nov-2012
• 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: 01-Apr-2008
• Referred By: ASTM B787/B787M-04(2020) - Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
• Effective Date: 01-Apr-2008
• 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: 01-Apr-2008
• Referred By: ASTM F68-16 - Standard Specification for Oxygen-Free Copper in Wrought Forms for Electron Devices
• Effective Date: 01-Apr-2008
• Referred By: ASTM B193-20 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2008
• Referred By: ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
• Effective Date: 01-Apr-2008

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:B2 −08
StandardSpecification for
1
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.
1. Scope 2.3 Other Documents:
NBS Handbook 100 Copper Wire Tables of the National
1.1 This specification covers medium-hard-drawn round
3
Bureau of Standards
copper wire for electrical purposes (see Explanatory Note 1).
3. Ordering Information
1.2 The SI values of density and resistivity are to be
regarded as standard. For all other properties the inch-pound
3.1 Orders for material under this specification should
values are to be regarded as standard, and the SI units may be include the following information:
3.1.1 Quantity of each size;
approximate.
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
that the finished product shall have the properties and charac-
2.1 The following documents of the issue in effect on date
teristics prescribed in this specification.
of material purchase form a part of this specification to the
extent referenced herein:
NOTE1—SpecificationsB5,B49,andB170definethematerialssuitable
for use.
2
2.2 ASTM Standards:
4.2 Copper bars of special qualities, forms, or types, as may
B5 Specification for High Conductivity Tough-Pitch Copper
be agreed upon between the manufacturer and the purchaser,
Refinery Shapes
and which will conform to the requirements prescribed in this
B49 Specification for Copper Rod Drawing Stock for Elec-
specification, may also be used.
trical Purposes
B170 Specification for Oxygen-Free Electrolytic Copper—
5. Dimensions and Permissible Variations
Refinery Shapes
5.1 The wire sizes shall be expressed as the diameter of the
B193 Test Method for Resistivity of Electrical Conductor
wire in decimal fractions of an inch to the nearest 0.0001 in.
Materials
(0.1 mil) or in millimetres to the nearest 0.001 mm (Explana-
B258 Specification for Nominal Diameters and Cross-
tory Note 2).
SectionalAreasofAWGSizesofSolidRoundWiresUsed
as Electrical Conductors
5.2 Within the range of diameters included in Table 1 the
wire shall not vary from the specified diameter by more than
61 %, expressed to the nearest 0.0001 in. (0.1 mil) 0.001 mm.
5.3 Ten percent, but not less than five coils or spools (or all
if the lot is less than five) from any lot of wire shall be gaged
1
This specification is under the jurisdiction of ASTM Committee B01 on
at three places. If accessible, one gaging shall be taken near
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
each end and one near the middle. If any of the selected coils
Conductors of Copper and Copper Alloys.
Current edition approved April 1, 2008. Published April 2008. Originally
orspoolsfailstoconformtotherequirementsprescribedin5.2,
´1
approvedin1912.Lastpreviouseditionapprovedin2005asB2 – 00(2005) .DOI:
all coils or spools shall be gaged in the manner specified.
10.1520/B0002-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), 5285 Port
the ASTM website. Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B2−08
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 2.5
0.2294 5.827 52 620 0.04133 26.7 48 000 55 000 33
...

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.
e1
Designation:B 2–00 (Reapproved 2005) Designation: B 2 – 08
Standard Specification for
1
Medium-Hard-Drawn Copper Wire
This standard is issued under the fixed designation B 2; 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 (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Reference to military approval (DoD) was removed in March 2005.
1. Scope
1.1 This specification covers medium-hard-drawn round copper wire for electrical purposes (see Explanatory Note 1).
1.2 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound values are
to be regarded as standard, and the SI units may be approximate.
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.
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:
B 5 Specification for High- Conductivity Tough-Pitch Copper Refinery Shapes
B 49 Specification for Copper Rod Drawing Stock for Electrical Purposes
B 170 Specification for Oxygen-Free Electrolytic Copper—Refinery Shapes
B 193 Test Method for Resistivity of Electrical Conductor Materials
B 258 Specification for Standard Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Used as
Electrical Conductors
2.3 Other Documents:
3
NBS Handbook 100 Copper Wire Tables of the National Bureau of Standards
3. Ordering Information
3.1 Orders for material under this specification should include the following information:
3.1.1 Quantity of each size;
3.1.2 Wire size: diameter in inches (see 5.1 and Table 1);
3.1.3 Type of copper, if special (see Section 4);
3.1.4 Package size (see 10.111.1);
3.1.5 Special package marking, if required; and
3.1.6 Place of inspection (Section 10).
4. Materials and Manufacture
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.
NOTE 1—Specifications B 5, B 49, and B 170 define the materials suitable for use.
4.2 Copper bars of special qualities, forms, or types, as may be agreed upon between the manufacturer and the purchaser, and
which will conform to the requirements prescribed in this specification, may also be used.
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on Conductors
of Copper and Copper Alloys.
Current edition approved Mar. 1, 2005. Published March 2005. Originally approved in 1912. Last previous edition approved in 2000 as B2–00.
e1
Current edition approved April 1, 2008. Published April 2008. Originally approved in 1912. Last previous edition approved in 2005 asB2–00 (2005) .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from National Technical Information Service (NTIS), U.S. Department of Commerce, 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B 2–08
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 2.5
0.2294 5.827 52 620 0.04133 26.7 48 000 55 000 330 380 2.2
0.2043 5.189 41 740 0.03278 21.2 48 330 55 330 335 380 1.9
0.1819 4.620 33 090 0.02599 16.8 48 660 55 660 335 385 1.7
0.1620 4.115 26 240 0.02061 13.3 49 000 56 000 340 385 1.5
0.1443 3.665 20 820 0.0163
...