ASTM B21/B21M-12
(Specification)Standard Specification for Naval Brass Rod, Bar, and Shapes
Standard Specification for Naval Brass Rod, Bar, and Shapes
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.
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 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 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.
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Designation: B21/B21M −12
StandardSpecification for
1
Naval Brass Rod, Bar, and Shapes
This standard is issued under the fixed designation B21/B21M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* B601 Classification forTemper Designations for Copper and
Copper Alloys—Wrought and Cast
1.1 This specification establishes the requirements for naval
B858 Test Method forAmmoniaVaporTest for Determining
brass rod, bar, and shapes produced from Copper Alloy UNS
Susceptibility to Stress Corrosion Cracking in Copper
Nos. C46200, C46400, C47940, C48200, or C48500.
Alloys
1.1.1 For piston-finish rod or shafting refer to the Other
B950 Guide for Editorial Procedures and Form of Product
Requirements Section.
Specifications for Copper and Copper Alloys
1.1.2 For hot forging material, refer to Specification B124/
E8 Test Methods for Tension Testing of Metallic Materials
B124M.
E8M Test Methods forTensionTesting of Metallic Materials
3
1.2 Units—The values stated in inch-pound units or SI units
[Metric] (Withdrawn 2008)
are to be regarded separately as standard. Within the text, SI
E18 Test Methods for Rockwell Hardness of Metallic Ma-
units are shown in brackets. The values stated in each system
terials
may not be exact equivalents; therefore, each system shall be
E478 Test Methods for ChemicalAnalysis of CopperAlloys
used independently of the other. Combining values from the
two systems may result in nonconformance with the specifi-
3. General Requirements
cation.
3.1 The following sections of Specification B249/B249M
1.3 Warning—Mercury is a definite health hazard in use
constitute a part of this specification:
and disposal (see Performance Requirements).
3.1.1 Terminology,
3.1.2 Materials and Manufacture,
1.4 This standard does not purport to address all of the
3.1.3 Workmanship, Finish, and Appearance,
safety concerns, if any, associated with its use. It is the
3.1.4 Sampling,
responsibility of the user of this standard to establish appro-
3.1.5 Number of Tests and Retests,
priate safety and health practices and determine the applica-
3.1.6 Specimen Preparation,
bility of regulatory limitations prior to use.
3.1.7 Test Methods,
2. Referenced Documents
3.1.8 Significance of Numerical Limits,
2
3.1.9 Inspection,
2.1 ASTM Standards:
3.1.10 Rejection and Rehearing,
B124/B124M Specification for Copper and Copper Alloy
3.1.11 Certification,
Forging Rod, Bar, and Shapes
3.1.12 Mill Test Report,
B154 Test Method for Mercurous Nitrate Test for Copper
3.1.13 Packaging and Product Marking, and
Alloys
3.1.14 Supplementary Requirements.
B249/B249M Specification for General Requirements for
Wrought Copper and Copper-Alloy Rod, Bar, Shapes and 3.2 In addition, when a section with a title identical to that
Forgings
referenced in 3.1, above, appears in this specification, it
contains additional requirements which supplement those ap-
pearing in Specification B249/B249M.
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
4. Ordering Information
Bar, Wire, Shapes and Forgings.
Current edition approved April 1, 2012. Published May 2012. Originally
4.1 Include the following specified choices when placing
approved in 1918. Last previous edition approved in 2006 as B21/B21M – 06. DOI:
orders for product under this specification, as applicable:
10.1520/B0021_B0021M-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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B21/B21M − 12
4.1.1 ASTM designation and year of issue, 6. Temper
4.1.2 Copper Alloy UNS No. designation (Scope),
6.1 The standard tempers for products described in this
4.1.3 Temper (Temper Section and related Tables),
specification, as defined in Classification B601, are shown in
4.1.4 Form—cross-section such as round, hexagonal,
Tables 2 and 3.
square, and so forth,
4.1.5 Diameter or distance between parallel surfaces, width 7. Mechanical Property Requirements
and thickness (Dimensions and Permissible Variations),
7.1 Product furnished
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B21/B21M–06 Designation: B21/B21M – 12
Standard Specification for
1
Naval Brass Rod, Bar, and Shapes
This standard is issued under the fixed designation B21/B21M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification establishes the requirements for naval brass rod, bar, and shapes produced from CopperAlloy 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 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 stated in each system aremay 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 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 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
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
3. General Requirements
3.1 The following sections of Specification B249/B249M constitute a part of this specification:
3.1.1 Terminology,
3.1.2 Materials and Manufacture,
3.1.3 Workmanship, Finish, and Appearance,
3.1.4 Sampling,
3.1.5 Number of Tests and Retests,
3.1.6 Specimen Preparation,
3.1.7 Test Methods,
3.1.8 Significance of Numerical Limits,
3.1.9 Inspection,
3.1.10 Rejection and Rehearing,
1
This specification is under the jurisdiction ofASTM Committee B05 on Copper and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
´1
Current edition approved Feb. 1, 2006. Published February 2006. Originally approved in 1918. Last previous edition approved in 2001 as B21/B21M–01 . DOI:
10.1520/B0021_B0021M-06.
Current edition approved April 1, 2012. Published May 2012. Originally approved in 1918. Last previous edition approved in 2006 as B21/B21M – 06. DOI:
10.1520/B0021_B0021M-12.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
B21/B21M – 12
3.1.11 Certification,
3.1.12 Mill Test Report,
3.1.13 Packaging and Product Marking, and
3.1.14 Supplementary Requirements.
3.2 In addition, when a section with a title identical to that referenced in 3.1, above, appears in this specification, it contains
additional requirements which supplement those appearing in Specification B249/B249M.
4. Ordering Information
4.1 Include the following informationspecified choices when placing orders for product under this specification, as applicable:
4.1.1 ASTM designation and year of issue,
4.1.2 Copper Alloy UNS No. designation (Scope),
4.1.3 Temper (Temper Section and related Tables),
4.1.4 Form—cross-section such as round, hexagonal, square, and so forth,
4.1.
...
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