ASTM B250/B250M-16
(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, and B974/B974M 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and to determine the applicability of regulatory limitations prior to use.
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Designation:B250/B250M −16
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* B159/B159MSpecification for Phosphor Bronze Wire
B193Test Method for Resistivity of Electrical Conductor
1.1 This specification establishes requirements common to
Materials
wrought copper and copper alloy wire and shall apply to
B194SpecificationforCopper-BerylliumAlloyPlate,Sheet,
Specifications B16/B16M, B99/B99M, B134/B134M, B159/
Strip, and Rolled Bar
B159M, B197/B197M, B206/B206M, B272, B301/B301M,
B197/B197M Specification for Copper-Beryllium Alloy
B453/B453M, B967/B967M, and B974/B974M to the extent
Wire
referenced therein.
B206/B206MSpecification for Copper-Nickel-Zinc (Nickel
1.2 The chemical composition, physical and mechanical
Silver) Wire and Copper-Nickel Alloy Wire
properties, and all other requirements not included in this
B272Specification for Copper Flat Products with Finished
specification shall be prescribed in the product specification.
(Rolled or Drawn) Edges (Flat Wire and Strip)
B301/B301MSpecification for Free-Cutting Copper Rod,
1.3 Units—Values stated in either SI units or inch-pound
units are to be regarded separately as standard.Within the text, Bar, Wire, and Shapes
B453/B453M Specification for Copper-Zinc-Lead Alloy
SI units are shown in brackets. The values stated in each
system may not be exact equivalents; therefore, each system (Leaded-Brass) Rod, Bar, and Shapes
B846Terminology for Copper and Copper Alloys
shall be used independently of the other. Combining values
from the two systems may result in non-conformance with the B900Practice for Packaging of Copper and Copper Alloy
Mill Products for U.S. Government Agencies
standard.
B967/B967M Specification for Copper-Zinc-Tin-Bismuth
1.4 The following safety hazard caveat pertains only to the
Alloy Rod, Bar and Wire
testmethodsdescribedinthisspecification.Thisstandarddoes
B974/B974MSpecification for Free-Cutting Bismuth Brass
not purport to address all of the safety concerns, if any,
Rod, Bar and Wire
associatedwithitsuse.Itistheresponsibilityoftheuserofthis
E3Guide for Preparation of Metallographic Specimens
standard to establish appropriate safety and health practices
E8/E8MTest Methods for Tension Testing of Metallic Ma-
and to determine the applicability of regulatory limitations
terials
prior to use.
E18Test Methods for Rockwell Hardness of Metallic Ma-
terials
2. Referenced Documents
2 E29Practice for Using Significant Digits in Test Data to
2.1 ASTM Standards:
Determine Conformance with Specifications
B16/B16MSpecification for Free-Cutting Brass Rod, Bar
E54Test Methods for ChemicalAnalysis of Special Brasses
and Shapes for Use in Screw Machines
3
and Bronzes (Withdrawn 2002)
B99/B99MSpecification for Copper-Silicon Alloy Wire for
E62Test Methods for Chemical Analysis of Copper and
General Applications
3
CopperAlloys(PhotometricMethods)(Withdrawn2010)
B134/B134MSpecification for Brass Wire
E75Test Methods for Chemical Analysis of Copper-Nickel
3
and Copper-Nickel-Zinc Alloys (Withdrawn 2010)
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
E112Test Methods for Determining Average Grain Size
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
E118 Test Methods for Chemical Analysis of Copper-
Bar, Wire, Shapes and Forgings.
3
Chromium Alloys (Withdrawn 2010)
Current edition approved Oct. 1, 2016. Published October 2016. Originally
E121Test Methods for Chemical Analysis of Copper-
approved in 1951. Last previous edition approved in 2013 as B250/B250M–13.
3
DOI: 10.1520/B0250_B0250M-16.
Tellurium Alloys (Withdrawn 2010)
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
1
---------------------- Page: 1 ----------------------
B250/B250M−16
NOTE 2—Blank spaces in the tolerance tables indicate either that the
E255Practice for Sampling Copper and Copper Alloys for
product is not generally available or that no tolerances have
...
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 − 13 B250/B250M − 16
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, and B974/B974M 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 may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and to determine the applicability of regulatory limitations prior to use.
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
E3 Guide for Preparation of Metallographic Specimens
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
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 April 1, 2013Oct. 1, 2016. Published April 2013October 2016. Originally approved in 1951. Last previous edition approved in 20122013 as
B250 – 12.B250/B250M–13. DOI: 10.1520/B0250_B0250M-13. 10.1520/B0250_B0250M-16.
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’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on 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
1
---------------------- Page: 1 ----------------------
B250/B250M − 16
3
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
3
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys (Wit
...
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