ASTM B33-10

Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes

ABSTRACT
This specification covers tinned, round, soft, or annealed copper wire for electrical purposes. The tinned wire shall conformto the required tensile strength and elongation. Electrical resistivity shall be measured. The wire sizes shall be expressed as the diameter of the wire and shall be measured using micrometre caliper equipped with a vernier. The tin coating shall be continuous. The continuity of the wire shall be determined on representative samples taken before stranding or insulating. The continuity of tinning shall be determined by the hydrochlroic acid-sodium polysulfide test. The tin coating shall be firmly adherent to the surface of the copper. The adherence of coating on the wire shall be determined on representative samples taken before stranding or insulating. The adherence of coating shall be determined by the wrapping and immersion test.
SCOPE
1.1 This specification covers tin-coated, round, soft, or annealed copper wire for electrical purposes.
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 Exceptions—The SI values for density, resistivity, and volume 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: 31-Mar-2010
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B33-04 - Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes
• Effective Date: 01-Apr-2010
• Replaced By: ASTM B33-10(2014) - Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
• Effective Date: 01-Sep-2014
• Referred By: ASTM B286-20 - Standard Specification for Copper Conductors for Use in Hookup Wire for Electronic Equipment
• Effective Date: 01-Apr-2010
• 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-2010
• Referred By: ASTM B787/B787M-04(2020) - Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
• Effective Date: 01-Apr-2010
• Referred By: ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
• Effective Date: 01-Apr-2010
• Referred By: ASTM F2715-19 - Standard Specification for Temporary Protective Equipotential Bond Mat To Be Used on De-Energized Equipment
• Effective Date: 01-Apr-2010
• Referred By: ASTM B174-17 - Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
• Effective Date: 01-Apr-2010
• Referred By: ASTM B173-17 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
• Effective Date: 01-Apr-2010
• Referred By: ASTM B193-20 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 01-Apr-2010
• Referred By: ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
• Effective Date: 01-Apr-2010
• 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-2010
• Referred By: ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
• Effective Date: 01-Apr-2010
• Referred By: ASTM B784-01(2017)e1 - Standard Specification for Modified Concentric-Lay-Stranded Copper Conductors for Use in Insulated Electrical Cables
• Effective Date: 01-Apr-2010
• Referred By: ASTM B738-13(2018) - Standard Specification for Fine-Wire Bunch-Stranded and Rope-Lay Bunch-Stranded Copper Conductors for Use as Electrical Conductors
• Effective Date: 01-Apr-2010

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:B33 −10
StandardSpecification for
Tin-Coated Soft or Annealed Copper Wire for Electrical
1
Purposes
This standard is issued under the fixed designation B33; 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 3.1.1 Quantity of each size,
3.1.2 Wire size-diameter in inches (see 5.3 and Table 1),
1.1 This specification covers tin-coated, round, soft, or
3.1.3 Type of copper, if special (see 4.2),
annealed copper wire for electrical purposes.
3.1.4 Package size (see 10.1),
1.2 The values stated in inch-pound units are to be regarded
3.1.5 Special packaging marking, if required, and
as standard. The values given in parentheses are mathematical
3.1.6 Place of inspection (see 7.1).
conversions to SI units that are provided for information only
4. Material
and are not considered standard.
1.2.1 Exceptions—The SI values for density, resistivity, and
4.1 Tin for Coating—The tin used for coating shall be
volume are to be regarded as standard.
commercially pure (Explanatory Note 1). For purposes of this
specification, the tin shall be considered commercially pure if
1.3 This standard does not purport to address all of the
the total of other elements, exclusive of copper, does not
safety concerns, if any, associated with its use. It is the
exceed 1%. Notwithstanding the previous sentence, chemical
responsibility of the user of this standard to establish appro-
analysisofthetincoatingorofthetinusedforcoatingshallnot
priate safety and health practices and determine the applica-
be required under this specification. Adequacy of the tin
bility of regulatory limitations prior to use.
coatingisassuredbythecontinuityofcoatingandadherenceof
2. Referenced Documents
coating requirements (see 5.4 and 5.5, respectively).
2
2.1 ASTM Standards:
4.2 Copper-Base Metal—The base metal shall be copper of
B49 Specification for Copper Rod Drawing Stock for Elec-
such quality and purity that the finished product shall have
trical Purposes
properties and characteristics prescribed in this specification.
B193 Test Method for Resistivity of Electrical Conductor
NOTE 1—Specification B49 defines copper suitable for use.
Materials
B258 Specification for Nominal Diameters and Cross- 4.3 Copper bars of special qualities, forms, or types, as may
SectionalAreasofAWGSizesofSolidRoundWiresUsed be agreed upon between the manufacturer and the purchaser,
as Electrical Conductors and which will conform to the requirements prescribed in this
3
2.2 Other Document: specification, may also be used.
NBS Handbook 100 Copper Wire Tables
5. General Requirements (See Section 8)
3. Ordering Information
5.1 Tensile Strength and Elongation (Explanatory Note 2
3.1 Orders for material under this specification shall include and Note 3)—The tinned wire shall conform to the require-
the following information:
ments for elongation prescribed in Table 1. No requirements
for tensile strength are specified. For wire whose nominal
1
diameter is more than 0.001 in. (0.025 mm) greater than a size
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
listed in Table 1, but less than that of the next larger size, the
Conductors of Copper and Copper Alloys.
requirements of the next larger size shall apply.
Current edition approved April 1, 2010. Published May 2010. Originally
approved in 1919. Last previous edition approved in 2004 as B33 – 04. DOI:
5.2 Resistivity (Explanatory Note 1 and Note 4)—The elec-
10.1520/B0033-10.
trical resistivity of tinned wire at a temperature of 20°C shall
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
not exceed the values prescribed in Table 2.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
5.3 Dimensions and Permissible Variations (Explanatory
the ASTM website.
3 Note 2)—The wire sizes shall be expressed as the diameter of
Available from National Technical Information Service (NTIS), U.S. Depart-
ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161. thewireindecimalfractionsofaninchtothenearest0.0001in.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B33−10
TABLE 1 Tensile Requirements
(0.0025 mm). The tin-coated wire shall not vary from the
Diameter Area at 20°C specified diameter by more than the amo
...

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:B33–04 Designation: B33 – 10
Standard Specification for
TinnedTin-Coated Soft or Annealed Copper Wire for
1
Electrical Purposes
This standard is issued under the fixed designation B33; 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
1.1This specification covers tinned, round, soft, or annealed copper wire for electrical purposes.
1.2The SI values for density and resistivity are to be regarded as standard. For all other properties the inch-pound values are
to be regarded as the standard and the SI units may be approximate.
1.1 This specification covers tin-coated, round, soft, or annealed copper wire for electrical purposes.
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 Exceptions—The SI values for density, resistivity, and volume 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B49 Specification for Copper Rod Drawing Stock for Electrical Purposes B193
B193 Test Method for Resistivity of Electrical Conductor Materials
B258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Used as Electrical
Conductors
3
2.2 Other Document:
NBS Handbook 100 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 (see 4.2),
3.1.4 Package size (see 10.1),
3.1.5 Special packaging marking, if required, and
3.1.6 Place of inspection (see 7.1).
4. Material
4.1 Tin for Coating—The tin used for coating shall be commercially pure (Explanatory Note 1). For purposes of this
specification, the tin shall be considered commercially pure if the total of other elements, exclusive of copper, does not exceed 1%.
Notwithstandingtheprevioussentence,chemicalanalysisofthetincoatingorofthetinusedforcoatingshallnotberequiredunder
this specification. Adequacy of the tin coating is assured by the continuity of coating and adherence of coating requirements (see
5.4 and 5.5, respectively).
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 Sept.April 1, 2004.2010. Published October 2004.May 2010. Originally approved in 1919. Last previous edition approved in 20002004 as
B33–00.B33 – 04. DOI: 10.1520/B0033-104.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B33–10
TABLE 1 Tensile Requirements
Diameter Area at 20°C
Elongation
in 10 in.
(250 mm),
2 2
in. mm cmil in. mm %min
0.4600 11.6840 211600.00 0.166190 107.2193 30
0.4600 11.684 211600 0.1662 107.0 30
0.4096 10.4038 167772.16 0.131768 85.0114 30
0.4096 10.404 167800 0.1318 85.0 30
0.3648 9.2659 133079.04 0.104520 67.4321 30
0.3648 9.266 133100 0.1045 67.4 30
0.3249 8.2525 105560.01 0.082907 53.4880 30
0.3249 8.252 105600 0.08291 53.5 30
0.2893 7.3482 83694.49 0.065733 42.4086 25
0.2893 7.348 83690 0.06573 42.4 25
0.2576 6.5430 66357.76 0.052117 33.6240 25
0.2576 6.543 66360 0.05212 33.6 25
0.2294 5.8268 52624.36 0.041331 26.6652 25
0.2294 5.827 52620 0.04133 26.7 25
0.2043 5.1892 41738.49 0.032781 21.1492 25
0.2043 5.189 41740 0.03278 21.2 25
0.18
...