ASTM B250/B250M-19
(Specification)Standard Specification for General Requirements for Wrought Copper Alloy Wire
Standard Specification for General Requirements for Wrought Copper Alloy Wire
ABSTRACT
This specification establishes the general requirements common to wrought copper and copper alloy wires. The materials for manufacture shall be a cast bar, billet, rod, or other form of such purity and soundness as to be suitable for processing by hot working, cold working, and subsequent annealing to produce finished products that meet the specified temper properties and have a uniform wrought structure. Products shall be sampled and prepared, then tested accordingly to examine their conformance to dimensional (diameter, thickness, specific and stock lengths, width, straightness, and edge contour), mechanical (tensile, yield and bend strengths, elongation, and Rockwell hardness), electrical (resistivity and conductivity), chemical composition, and grain size requirements. In the event of conflict between this specification and the individual casting product specifications, the requirements of the casting specification shall take precedence.
SIGNIFICANCE AND USE
12.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following table, an observed value or calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.
Property
Rounded Unit for Observed
or Calculated Value
Dimensions
Chemical composition
Hardness
Electrical resistivity/conductivity
nearest unit in the last
right-hand significant
digit used in expressing
the limiting value
Tensile strength
Yield strength
nearest ksi [5 MPa]
Elongation
Below 5 %
nearest multiple of 0.5 %
5 % and over
nearest 1 %
Grain size
Under 0.060 mm
nearest multiple of 0.005 mm
0.060 mm and over
nearest 0.01 mm
SCOPE
1.1 This specification establishes requirements common to wrought copper and copper alloy wire and shall apply to Specifications B16/B16M, B99/B99M, B134/B134M, B159/B159M, B197/B197M, B206/B206M, B272, B301/B301M, B453/B453M, B967/B967M, B974/B974M, and B981/B981M to the extent referenced therein.
1.2 The chemical composition, physical and mechanical properties, and all other requirements not included in this specification shall be prescribed in the product specification.
1.3 Units—Values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, each system shall be used independently of the other and values from the two systems shall not be combined.
1.4 The following safety hazard caveat pertains only to the test methods described in this specification. 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, health, and environmental practices and to determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B250/B250M −19
Standard Specification for
1
General Requirements for Wrought Copper Alloy Wire
This standard is issued under the fixed designation B250/B250M; 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.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* B16/B16MSpecification for Free-Cutting Brass Rod, Bar
and Shapes for Use in Screw Machines
1.1 This specification establishes requirements common to
B99/B99MSpecification for Copper-Silicon Alloy Wire for
wrought copper and copper alloy wire and shall apply to
General Applications
Specifications B16/B16M, B99/B99M, B134/B134M, B159/
B134/B134MSpecification for Brass Wire
B159M, B197/B197M, B206/B206M, B272, B301/B301M,
B159/B159MSpecification for Phosphor Bronze Wire
B453/B453M,B967/B967M,B974/B974M,andB981/B981M
B193Test Method for Resistivity of Electrical Conductor
to the extent referenced therein.
Materials
1.2 The chemical composition, physical and mechanical
B194SpecificationforCopper-BerylliumAlloyPlate,Sheet,
properties, and all other requirements not included in this
Strip, and Rolled Bar
specification shall be prescribed in the product specification.
B197/B197M Specification for Copper-Beryllium Alloy
Wire
1.3 Units—Values stated in either SI units or inch-pound
units are to be regarded separately as standard.Within the text, B206/B206MSpecification for Copper-Nickel-Zinc (Nickel
Silver) Wire and Copper-Nickel Alloy Wire
SI units are shown in brackets. The values stated in each
system are not necessarily exact equivalents; therefore, each B272Specification for Copper Flat Products with Finished
(Rolled or Drawn) Edges (Flat Wire and Strip)
system shall be used independently of the other and values
from the two systems shall not be combined. B301/B301MSpecification for Free-Cutting Copper Rod,
Bar, Wire, and Shapes
1.4 The following safety hazard caveat pertains only to the
B453/B453M Specification for Copper-Zinc-Lead Alloy
testmethodsdescribedinthisspecification.Thisstandarddoes
(Leaded-Brass) Rod, Bar, and Shapes
not purport to address all of the safety concerns, if any,
B846Terminology for Copper and Copper Alloys
associatedwithitsuse.Itistheresponsibilityoftheuserofthis
B900Practice for Packaging of Copper and Copper Alloy
standard to establish appropriate safety, health, and environ-
Mill Products for U.S. Government Agencies
mental practices and to determine the applicability of regula-
B967/B967M Specification for Copper-Zinc-Tin-Bismuth
tory limitations prior to use.
Alloy Rod, Bar and Wire
1.5 This international standard was developed in accor-
B974/B974MSpecification for Free-Cutting Bismuth Brass
dance with internationally recognized principles on standard-
Rod, Bar and Wire
ization established in the Decision on Principles for the
B981/B981MSpecificationforLow-LeadedBrassRod,Bar,
Development of International Standards, Guides and Recom-
Wire, and Shapes
mendations issued by the World Trade Organization Technical
E3Guide for Preparation of Metallographic Specimens
Barriers to Trade (TBT) Committee.
E8/E8MTest Methods for Tension Testing of Metallic Ma-
terials
2. Referenced Documents
E18Test Methods for Rockwell Hardness of Metallic Ma-
2
2.1 ASTM Standards:
terials
E29Practice for Using Significant Digits in Test Data to
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
Determine Conformance with Specifications
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
E54Test Methods for ChemicalAnalysis of Special Brasses
Bar, Wire, Shapes and Forgings.
3
and Bronzes (Withdrawn 2002)
Current edition approved Oct. 1, 2019. Published November 2019. Originally
E62Test Methods for Chemical Analysis of Copper and
approved in 1951. Last previous edition approved in 2016 as B250/B250M–16.
DOI: 10.1520/B0250_B0250M–19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B250/B250M−19
3
Copp
...
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: B250/B250M − 16 B250/B250M − 19
Standard Specification for
1
General Requirements for Wrought Copper Alloy Wire
This standard is issued under the fixed designation B250/B250M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification establishes requirements common to wrought copper and copper alloy wire and shall apply to
Specifications B16/B16M, B99/B99M, B134/B134M, B159/B159M, B197/B197M, B206/B206M, B272, B301/B301M, B453/
B453M, B967/B967M, B974/B974Mand, B974/B974Mand B981/B981M to the extent referenced therein.
1.2 The chemical composition, physical and mechanical properties, and all other requirements not included in this specification
shall be prescribed in the product specification.
1.3 Units—Values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units
are shown in brackets. The values stated in each system mayare not benecessarily exact equivalents; therefore, each system shall
be used independently of the other. Combiningother and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.4 The following safety hazard caveat pertains only to the test methods described in this specification. 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 safety, health, and healthenvironmental practices and to determine the applicability of regulatory
limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
B16/B16M Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines
B99/B99M Specification for Copper-Silicon Alloy Wire for General Applications
B134/B134M Specification for Brass Wire
B159/B159M Specification for Phosphor Bronze Wire
B193 Test Method for Resistivity of Electrical Conductor Materials
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B197/B197M Specification for Copper-Beryllium Alloy Wire
B206/B206M Specification for Copper-Nickel-Zinc (Nickel Silver) Wire and Copper-Nickel Alloy Wire
B272 Specification for Copper Flat Products with Finished (Rolled or Drawn) Edges (Flat Wire and Strip)
B301/B301M Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes
B453/B453M Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Rod, Bar, and Shapes
B846 Terminology for Copper and Copper Alloys
B900 Practice for Packaging of Copper and Copper Alloy Mill Products for U.S. Government Agencies
B967/B967M Specification for Copper-Zinc-Tin-Bismuth Alloy Rod, Bar and Wire
B974/B974M Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire
B981/B981M Specification for Low-Leaded Brass Rod, Bar, Wire, and Shapes
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
Current edition approved Oct. 1, 2016Oct. 1, 2019. Published October 2016November 2019. Originally approved in 1951. Last previous edition approved in 20132016
as B250/B250M–13.–16. DOI: 10.1520/B0250_B0250M-16.10.1520/B0250_B0250M–19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B250/B250M − 19
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardne
...
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