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This specification establishes the requirements for rods, bars, and shapes of naval brass with Copper Alloy UNS Nos. C46200, C46400, C47940, C48200, and C48500. Tempers available under this specification are M30 (as-hot extruded), O60 (soft annealed), O50 (light annealed), H60 (cold headed and formed), H02 (½ hard), and H04 (hard). Products shall be tested and shall adhere to dimensional (diameter, shape, length, straightness, and edge contour), mechanical (tensile and yield strength, Rockwell hardness, and elongation), and chemical composition requirements. Products shall also meet piston-finish rod and shafting, and U.S. Government purchase requirements.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification establishes the requirements for naval brass rod, bar, and shapes produced from Copper Alloy UNS Nos. C46200, C46400, C46750, C47940, C48200, C48500, C48640, or C48645.
1.1.1 For piston-finish rod or shafting refer to the Other Requirements Section.
1.1.2 For hot forging material, refer to Specification .
1.2 Units—The values stated in either inch-pound units or SI 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, to ensure conformance with the standard, each system shall be used independently of the other and values from the two systems shall not be combined.
1.3 Warning—Mercury is a definite health hazard in use and disposal (see Performance Requirements).
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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B124/B124M Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
B154 Test Method for Mercurous Nitrate Test for Copper Alloys
B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B601 Classification for Temper Designations for Copper and Copper AlloysWrought and Cast
B858 Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods)
E478 Test Methods for Chemical Analysis of Copper Alloys
ICS Number Code 77.150.30 (Copper products)
UNSPSC Code 30102410(Brass rods); 30261500(Brass bars)
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ASTM B21 / B21M-20, Standard Specification for Naval Brass Rod, Bar, and Shapes, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top