ASTM B371/B371M-19

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: B371/B371M − 15 B371/B371M − 19
Standard Specification for
Copper-Zinc-Silicon Alloy Rod
This standard is issued under the fixed designation B371/B371M; 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 U.S. Department of Defense.
1. Scope*
1.1 This specification establishes the requirements for copper-zinc-silicon alloy rod produced in Copper Alloy UNS Nos.
C69240, C69300, C69400, C69410, C69430, C69700, C69710, and C69710.C69850.
1.1.1 If the purchaser does not specify the alloy to be supplied, product is permitted to be furnished in any of the alloys named
in 1.1.
1.2 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 mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall
be used independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.3 The following safety hazard caveat pertains only to the test methods described in this specification. 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 safety, health, and healthenvironmental practices and determine the applicability of regulatory
requirements prior to use.
1.4 Warning—Mercury has been designated by many regulatory agencies as a hazardous materialsubstance that can cause
serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution
should be taken Use caution when handling mercury and mercury containing mercury-containing products. See the applicable
product Safety Data Sheet (SDS) for additional information. Users should be aware The potential exists that selling mercury and/or
mercury containing products into your state or country may be prohibited by law.or mercury-containing products, or both, is
prohibited by local or national law. Users must determine legality of sales in their location.
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
2.1 ASTM Standards:
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
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
E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E478 Test Methods for Chemical Analysis of Copper Alloys
3. General Requirements
3.1 The following sections of Specification B249/B249M constitutes a part of this specification:
3.1.1 Terminology,Terminology;
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
Current edition approved Oct. 1, 2015April 1, 2019. Published October 2015April 2019. Originally approved in 1961. Last previous edition approved in 20132015 as
B371/B371M – 08 (2013).B371/B371M–15. DOI: 10.1520/B0371_B0371M-15.10.1520/B0371_B0371M–19.
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 Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on 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
B371/B371M − 19
3.1.2 Materials and Manufacture,Manufacture;
3.1.3 Workmanship, Finish, and Appearance,Appearance;
3.1.4 Sampling,Sampling;
3.1.5 Number of Tests and Retests,Retests;
3.1.6 Specimen Preparation,Preparation;
3.1.7 Test Methods,Methods;
3.1.8 Significance of Numerical Limits,Limits;
3.1.9 Inspection,Inspection;
3.1.10 Rejection and Rehearing,Rehearing;
3.1.11 Certification,Certification;
3.1.12 Test Report,Report;
3.1.13 Packaging and Package Marking,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 information when placing orders for product under this specification, as applicable:
4.1.1 ASTM designation and year of issue,issue;
4.1.2 Copper alloy UNS No. designation,designation;
4.1.3 Form—Cross section such as round, hexagon, and so forth,forth;
4.1.4 Temper—(Section 7),);
4.1.5 Dimensions—Diameter or distance between parallel surfaces, nominal specific or stock length,length;
4.1.6 Quantity—Total weight, footage, or number of pieces,pieces; and
4.1.7 If product is purchased for agencies of the U.S. government (see Supplementary Requirements section of Specification
B249/B249M).
4.2 The following options are available and should be specified at the time of placing the order, when required:
4.2.1 Residual Stress Test (Performance Requirements section, Section 9),
4.2.1.1 Ammonia Vapor Test or Mercurous Nitrate Test,
4.2.1.2 For the Ammonia Vapor Test, pH value other than 10.
4.2.2 Certification (Specification B249/B249M), and
4.2.3 Mill test report (Specification B249/B249M).
5. Material and Manufacture
5.1 Material—The material of manufacture shall be cast billets, logs, or rods of Copper Alloy UNS Nos. C69240, C69300,
C69400, C69410, C69430, C69700, C69710, or C69710C69850 of such purity and soundness as to be suitable for processing into
the product prescribed herein.
5.2 Manufacture—The product shall be manufactured by hot extrusion and finished by such cold working, annealing,
straightening, and cutting to length as may be necessary to meet the properties specified.
6. Chemical Composition
6.1 The material shall conform to the chemical compositional requirements specified in Table 1 for the Copper Alloy UNS No.
designation specified in the ordering information.
6.1.1 These compositional limits do not preclude the presence of other elements. By agreement between the manufacturer and
the purchaser, limits may be established and analysis required for unnamed elements.
6.2 For alloys in which zinc is listed as “remainder,” either copper or zinc may be taken as the difference between the sum of
results of all other elements determined and 100 %.
6.3 When all elements in Table 1 are determined, the sum of results shall be 99.5 % min.
7. Temper
7.1 The standard temper for products under this specification is H02 (Half Hard) for UNS No. C69240 and C69300Nos.
C69240, C69300, and C69850 and H04 (Hard) for UNS Nos. C69400, C69430, C69700, and C69710.
8.
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