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ASTM B33-04

(Specification)

Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes

Standard Specification for Tinned 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 tinned, round, soft or annealed copper wire for electrical purposes.  
1.2 The 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.

General Information

Status
Historical
Publication Date
31-Aug-2004
ICS
29.060.10 - Wires
Technical Committee
B01 - Electrical Conductors
Drafting Committee
B01.04 - Conductors of Copper and Copper Alloys
Current Stage
Ref Project

Relations

Replaces
ASTM B33-00 - Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes
Effective Date
01-Sep-2004
Replaced By
ASTM B33-10 - Standard Specification for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes
Effective Date
01-Apr-2010
Referred By
ASTM B174-17 - Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors
Effective Date
01-Sep-2004
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-Sep-2004
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-Sep-2004
Referred By
ASTM B173-17 - Standard Specification for Rope-Lay-Stranded Copper Conductors Having Concentric-Stranded Members, for Electrical Conductors
Effective Date
01-Sep-2004
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-Sep-2004
Referred By
ASTM B286-20 - Standard Specification for Copper Conductors for Use in Hookup Wire for Electronic Equipment
Effective Date
01-Sep-2004
Referred By
ASTM F2321-23 - Standard Specification for Flexible and Rigid Insulated Temporary By-Pass Jumpers
Effective Date
01-Sep-2004
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-Sep-2004
Referred By
ASTM F2715-19 - Standard Specification for Temporary Protective Equipotential Bond Mat To Be Used on De-Energized Equipment
Effective Date
01-Sep-2004
Referred By
ASTM B226-11(2021) - Standard Specification for Cored, Annular, Concentric-Lay-Stranded Copper Conductors
Effective Date
01-Sep-2004
Referred By
ASTM B193-20 - Standard Test Method for Resistivity of Electrical Conductor Materials
Effective Date
01-Sep-2004
Referred By
ASTM B787/B787M-04(2020) - Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
Effective Date
01-Sep-2004
Referred By
ASTM B8-11(2017) - Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft
Effective Date
01-Sep-2004

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ASTM B33-04 - Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical PurposesASTM B33-04 - Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes
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ASTM B33-04 - Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes
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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 – 04
Standard Specification for
Tinned 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 Thisspecificationcoverstinned,round,soft,orannealed
3.1.3 Type of copper, if special (see 4.2),
copper wire for electrical purposes.
3.1.4 Package size (see 10.1),
1.2 The SI values for density and resistivity are to be
3.1.5 Special packaging marking, if required, and
regarded as standard. For all other properties the inch-pound
3.1.6 Place of inspection (see 7.1).
values are to be regarded as the standard and the SI units may
be approximate.
4. Material
1.3 This standard does not purport to address all of the
4.1 Tin for Coating—The tin used for coating shall be
safety concerns, if any, associated with its use. It is the
commercially pure (Explanatory Note 1). For purposes of this
responsibility of the user of this standard to establish appro-
specification, the tin shall be considered commercially pure if
priate safety and health practices and determine the applica-
the total of other elements, exclusive of copper, does not
bility of regulatory limitations prior to use.
exceed 1%. Notwithstanding the previous sentence, chemical
2. Referenced Documents analysisofthetincoatingorofthetinusedforcoatingshallnot
2
be required under this specification. Adequacy of the tin
2.1 ASTM Standards:
coatingisassuredbythecontinuityofcoatingandadherenceof
B49 Specification for Copper Rod Drawing Stock for Elec-
coating requirements (see 5.4 and 5.5, respectively).
trical Purposes
4.2 Copper-Base Metal—The base metal shall be copper of
B193 Test Method for Resistivity of Electrical Conductor
such quality and purity that the finished product shall have
Materials
properties and characteristics prescribed in this specification.
B258 Specification for Nominal Diameters and Cross-
SectionalAreas ofAWG Sizes of Solid Round Wires Used
NOTE 1—Specification B49 defines copper suitable for use.
as Electrical Conductors
4.3 Copper bars of special qualities, forms, or types, as may
3
2.2 Other Document:
be agreed upon between the manufacturer and the purchaser,
NBS Handbook 100 Copper Wire Tables
and which will conform to the requirements prescribed in this
specification, may also be used.
3. Ordering Information
3.1 Orders for material under this specification shall include
5. General Requirements (See Section 8) )
the following information:
5.1 Tensile Strength and Elongation (Explanatory Note 2
and Note 3)—The tinned wire shall conform to the require-
1
ments for elongation prescribed in Table 1. No requirements
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
for tensile strength are specified. For wire whose nominal
Conductors of Copper and Copper Alloys.
diameterismorethan0.001in.(1mil)(0.025mm)greaterthan
Current edition approved Sept. 1, 2004. Published October 2004. Originally
a size listed inTable 1, but less than that of the next larger size,
approved in 1919. Last previous edition approved in 2000 as B33 – 00. DOI:
10.1520/B0033-04. the requirements of the next larger size shall apply.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 Resistivity (Explanatory Note 1 and Note 4)—The
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
electrical resistivity of tinned wire at a temperature of 20°C
Standards volume information, refer to the standard’s Document Summary page on
shall not exceed the values prescribed in Table 2.
the ASTM website.
3
Available from National Technical Information Service (NTIS), U.S. Depart-
ment 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 ----------------------
B33–04
TABLE 1 Tensile Requirements
thewireindecimalfractionsofaninchtothenearest0.0001in.
Diameter Area at 20°C (0.1 mil) or in millimetres to the nearest 0.0025 mm. The
Elongation
tinned wire shall not vary from the specified diameter by more
in 10 in.
than the amounts prescribed in Table 3.
(250 mm),
2 2
in. mm cmil in. mm %min 5.4 Continuity of Coating—The tin coating shall be con-
tinuous. The continuity of coating on the wire shall be
0.460
...

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