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1. Scope
1.1 This specification establishes the requirements for naval brass rod, bar, and shapes produced from Copper Alloys UNS No. 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 materials, refer to Specification B124/B124M.
1.2 Units -- The 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 in each system are not 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 Warning--Mercury is a definite health hazard in use and disposal (see Performance Requirements).
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 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 Code
ICS Number Code 77.150.30 (Copper products)
UNSPSC Code
UNSPSC Code 30102410(Brass rods); 30261500(Brass bars)
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DOI: 10.1520/B0021_B0021M-01
Citation Format
ASTM B21 / B21M-01, Standard Specification for Naval Brass Rod, Bar, and Shapes, ASTM International, West Conshohocken, PA, 2001, www.astm.org
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