ASTM B21 / B21M - 12

    Standard Specification for Naval Brass Rod, Bar, and Shapes

    Active Standard ASTM B21 / B21M | Developed by Subcommittee: B05.02

    Book of Standards Volume: 02.01


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    Abstract

    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.

    Significance and Use

    1. Scope

    1.1 This specification establishes the requirements for naval brass rod, bar, and shapes produced from Copper Alloy UNS Nos. C46200, C46400, C47940, C48200, or C48500.

    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 B124/B124M.

    1.2 UnitsThe values stated in 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

    1.3 WarningMercury 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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    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 Alloys--Wrought and Cast

    B858 Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys

    B950 Guide for Editorial Procedures and Form of Product Specifications for Copper and Copper Alloys

    E8 Test Methods for Tension Testing of Metallic Materials

    E8M Test Methods for Tension Testing of Metallic Materials [Metric]

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E478 Test Methods for Chemical Analysis of Copper Alloys


    ICS Code

    ICS Number Code 77.150.30 (Copper products)

    UNSPSC Code

    UNSPSC Code 30102410(Brass rods); 30261500(Brass bars)


    DOI: 10.1520/B0021_B0021M-12

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