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ASTM B974/B974M-16(2021)

(Specification)

Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire

Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire

ABSTRACT
This specification establishes the requirements for free-cutting a bismuth brass rod, bar and wire of UNS Alloy No.C49250 and C49260 suitable for high-speed screw machine work or for general applications. Typically, products made to this specification are furnished as straight lengths or coils when requested. The material shall conform to the chemical composition requirements, tensile strength requirements, and elongation requirements stated in this specification.
SCOPE
1.1 This specification establishes the requirements for free-cutting bismuth brass rod, bar and wire of UNS Alloy No. C49250, C49260, C49265, C49340, and C49345 suitable for high-speed screw machine work, or for general applications.  
1.2 Typically, product made to this specification is furnished as straight lengths, or coils when requested.  
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 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.  
1.4 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.

General Information

Status
Published
Publication Date
31-Dec-2020
ICS
77.120.99 - Other non-ferrous metals and their alloys
Technical Committee
B05 - Copper and Copper Alloys
Drafting Committee
B05.02 - Rod, Bar, Wire, Shapes and Forgings
Current Stage
Ref Project

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ASTM B974/B974M-16(2021) - Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and WireASTM B974/B974M-16(2021) - Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire
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ASTM B974/B974M-16(2021) - Standard Specification for Free-Cutting Bismuth Brass Rod, Bar and Wire
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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.
Designation: B974/B974M −16 (Reapproved 2021)
Standard Specification for
1
Free-Cutting Bismuth Brass Rod, Bar and Wire
This standard is issued under the fixed designation B974/B974M; 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* E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
1.1 This specification establishes the requirements for free-
E53 Test Method for Determination of Copper in Unalloyed
cutting bismuth brass rod, bar and wire of UNS Alloy No.
Copper by Gravimetry
C49250, C49260, C49265, C49340, and C49345 suitable for
E54 Test Methods for ChemicalAnalysis of Special Brasses
high-speed screw machine work, or for general applications.
3
and Bronzes (Withdrawn 2002)
1.2 Typically,productmadetothisspecificationisfurnished
E62 Test Methods for Chemical Analysis of Copper and
3
as straight lengths, or coils when requested.
CopperAlloys(PhotometricMethods)(Withdrawn2010)
1.3 Units—The values stated in either SI units or inch- E92 Test Methods for Vickers Hardness and Knoop Hard-
ness of Metallic Materials
pound units are to be regarded separately as standard. The
values stated in each system are not necessarily exact equiva- E478 Test Methods for ChemicalAnalysis of CopperAlloys
E527 Practice for Numbering Metals and Alloys in the
lents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other, and values Unified Numbering System (UNS)
from the two systems shall not be combined.
2.2 Other Standards:
JIS H 1068:2005 Method for Determination of Bismuth in
1.4 This standard does not purport to address all of the
4
Copper and Copper Alloys
safety concerns, if any, associated with its use. It is the
ISO5959-1984 Copperandcopperalloys–determinationof
responsibility of the user of this standard to establish appro-
bismuth content – Diethyldithiocarbamate spectrometric
priate safety, health, and environmental practices and deter-
5
method
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
3. General Requirements
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.1 The following sections of Specification B249/B249M
Development of International Standards, Guides and Recom-
for rod and bar, and Specification B250/B250M for wire
mendations issued by the World Trade Organization Technical
constitute a part of this specification:
Barriers to Trade (TBT) Committee.
3.1.1 Terminology,
3.1.2 Materials and Manufacture,
2. Referenced Documents
3.1.3 Sampling,
2
3.1.4 Number of Tests and Retests,
2.1 ASTM Standards:
3.1.5 Specimen Preparation,
B249/B249M Specification for General Requirements for
3.1.6 Test Methods,
Wrought Copper and Copper-Alloy Rod, Bar, Shapes and
3.1.7 Inspection,
Forgings
3.1.8 Certification, and
B250/B250M Specification for General Requirements for
3.1.9 Test Reports.
Wrought Copper Alloy Wire
B846 Terminology for Copper and Copper Alloys
3.2 In addition, when a section with a title identical to that
referenced in 3.1 appears in this specification, it contains
additional requirements which supplement those appearing in
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
and CopperAlloys and is the direct responsibility of Subcommittee B05.02 on Rod,
Bar, Wire, Shapes and Forgings.
3
Current edition approved Jan. 1, 2021. Published January 2021. Originally The last approved version of this historical standard is referenced on
approved in 2010. Last previous edition approved in 2016 as B974/B974M – 16. www.astm.org.
4
DOI: 10.1520/B0974_B0974M-16R21. Available from Japanese StandardsAssociation (JSA), Mita MTBldg., 3-13-12
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Mita, Minato-ku, Tokyo 108-0073, Japan, http://www.jsa.or.jp.
5
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from International Organization for Standardization (ISO), ISO
Standards volume information, refer to the standard’s Document Summary page on Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
the ASTM website. Geneva, Switzerland, http://www.iso.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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