ASTM B250/B250M-19 - 1.10.2019
 
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

 
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/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.

 
2. Referenced Documents

E118-89(1996)

Standard Test Methods for Chemical Analysis of Copper-Chromium Alloys

E75-76(1996)

Standard Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys

E478-08(2017)

Standard Test Methods for Chemical Analysis of Copper Alloys

E581-17A(2022)e1

Standard Test Methods for Chemical Analysis of Manganese-Copper Alloys (Includes all amendments and changes 9/13/2022).

E121-83(1996)

Standard Test Methods for Chemical Analysis of Copper-Tellurium Alloys

E255-23

Standard Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition

E62-89(1996)

Standard Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)

E54-80(1996)

Standard Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)

E29-22

Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E18-22

Standard Test Methods for Rockwell Hardness of Metallic Materials

E8/E8M-24

Standard Test Methods for Tension Testing of Metallic Materials

E3-11(2017)

Standard Guide for Preparation of Metallographic Specimens

B974/B974M-16(2021)

Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire

B967/B967M-18(2023)

Standard Specification for Copper-Zinc-Tin-Bismuth Alloy Rod, Bar and Wire

E112-13(2021)

Standard Test Methods for Determining Average Grain Size

B900-16(2022)

Standard Practice for Packaging of Copper and Copper Alloy Mill Products for U.S. Government Agencies

B194-22

Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar

B193-20

Standard Test Method for Resistivity of Electrical Conductor Materials

B159/B159M-17

Standard Specification for Phosphor Bronze Wire

B134/B134M-15(2021)

Standard Specification for Brass Wire

B99/B99M-15(2021)

Standard Specification for Copper-Silicon Alloy Wire for General Applications

B16/B16M-19

Standard Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines

B206/B206M-12(2017)

Standard Specification for Copper-Nickel-Zinc (Nickel Silver) Wire and Copper-Nickel Alloy Wire

B846-19a

Standard Terminology for Copper and Copper Alloys (Includes all amendments and changes 8/8/2019).

B453/B453M-19

Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Rod, Bar, and Shapes

B197/B197M-20e1

Standard Specification for Copper-Beryllium Alloy Wire (Includes all amendments and changes 11/21/2022).

B272-12(2019)

Standard Specification for Copper Flat Products with Finished (Rolled or Drawn) Edges (Flat Wire and Strip)

B301/B301M-13(2020)

Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes