ASTM B249/B249M-18

ASTM B249/B249M-18 - 1.3.2018

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 and for dimensional tolerances, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.

Property	Rounded Unit for Observed or Calculated Value

Chemical composition
Hardness	nearest unit in the last right-hand
Electrical resistivity	significant digit used in expressing the
Electrical conductivity	limiting value

Tensile strength	nearest ksi [5 MPa]
Yield strength

Elongation:	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 specification2 establishes the general requirements common to wrought copper and copper alloy rod, bar, shapes, and forgings which shall apply to Specifications B16/B16M, B21/B21M, B98/B98M, B124/B124M, B138/B138M, B139/B139M, B140/B140M, B150/B150M, B151/B151M, B187/B187M, B196/B196M, B283/B283M, B301/B301M, B371/B371M, B411/B411M, B441, B453/B453M, B455, B570, B870, B927/B927M, B929, 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 are prescribed in the product specification.

1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.

1.3.1 Within the text the SI values are given in brackets.

1.4 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 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

B570-22	Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos. C17000 and C17200)
B455-10	Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Extruded Shapes
B846-24	Standard Terminology for Copper and Copper Alloys
B858-06(2024)	Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys
B870-21	Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions (UNS Nos. C17500, C17510, and C17540)
B900-16(2022)	Standard Practice for Packaging of Copper and Copper Alloy Mill Products for U.S. Government Agencies
B927/B927M-23	Standard Specification for Brass Rod, Bar, and Shapes
B301/B301M-13(2020)	Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes
B371/B371M-19(2026)	Standard Specification for Copper-Zinc-Silicon Alloy Rod
B411/B411M-14(2019)	Standard Specification for Copper-Nickel-Silicon Alloy Rod and Bar
B441-22	Standard Specification for Copper-Cobalt-Beryllium Alloy, Copper-Nickel-Beryllium Alloy, Copper-Nickel-Lead-Beryllium Alloy, and Copper-Nickel-Cobalt Alloy Rod and Bar
B453/B453M-19(2026)	Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Rod, Bar, and Shapes
B929-23	Standard Specification for Copper-Nickel-Tin Spinodal Alloy Rod and Bar
B967/B967M-18(2023)	Standard Specification for Copper-Zinc-Tin-Bismuth Alloy Rod, Bar and Wire
B974/B974M-16(2021)	Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire
D4855-97	Standard Practice for Comparing Test Methods
E3-26	Standard Guide for Preparation of Metallographic Specimens
E8/E8M-25	Standard Test Methods for Tension Testing of Metallic Materials
E18-25	Standard Test Methods for Rockwell Hardness of Metallic Materials
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E53-07	Standard Test Method for Determination of Copper in Unalloyed Copper by Gravimetry
E54-80(1996)	Standard Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
E62-89(1996)	Standard Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)
E75-76(1996)	Standard Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys
E76-88(1998)	Standard Test Methods for Chemical Analysis of Nickel-Copper Alloys (Withdrawn 2003)
E112-25e1	Standard Test Methods for Determining Average Grain Size (Includes all amendments and changes 9/9/2026).
E118-89(1996)	Standard Test Methods for Chemical Analysis of Copper-Chromium Alloys
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
E290-22	Standard Test Methods for Bend Testing of Material for Ductility
E478-24	Standard Test Methods for Chemical Analysis of Copper Alloys
B140/B140M-22	Standard Specification for Copper-Zinc-Lead (Red Brass or Hardware Bronze) Rod, Bar, and Shapes
B150/B150M-26	Standard Specification for Aluminum Bronze Rod, Bar, and Shapes
B151/B151M-20	Standard Specification for Copper-Nickel-Zinc Alloy (Nickel Silver) and Copper-Nickel Rod and Bar
B154-16(2022)	Standard Test Method for Mercurous Nitrate Test for Copper Alloys
B187/B187M-26	Standard Specification for Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar, and Shapes
B193-25	Standard Test Method for Resistivity of Electrical Conductor Materials
B194-22	Standard Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B196/B196M-24	Standard Specification for Copper-Beryllium Alloy Rod and Bar
B98/B98M-13(2019)	Standard Specification for Copper-Silicon Alloy Rod, Bar and Shapes
B124/B124M-20	Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
B138/B138M-11(2024)	Standard Specification for Manganese Bronze Rod, Bar, and Shapes
B139/B139M-12(2024)	Standard Specification for Phosphor Bronze Rod, Bar, and Shapes
B16/B16M-24	Standard Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines
B21/B21M-20	Standard Specification for Naval Brass Rod, Bar, and Shapes
B283/B283M-24	Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)
E581-17A(2022)e1	Standard Test Methods for Chemical Analysis of Manganese-Copper Alloys (Includes all amendments and changes 9/13/2022).
B577-24	Standard Test Methods for Detection of Cuprous Oxide (Hydrogen Embrittlement Susceptibility) in Copper