ASTM B271/B271M-23
(Specification)Standard Specification for Copper-Base Alloy Centrifugal Castings
Standard Specification for Copper-Base Alloy Centrifugal Castings
ABSTRACT
This specification establishes the requirements for copper-based brass or bronze centrifugal castings. Mechanical properties are determined from test bar castings and should meet the requirements listed herein. Brinell hardness readings should be taken on the grip end of tension test bars. All castings should not be repaired by welding without customer approval. UNS C95520 copper alloy castings are used in the heat treated condition only.
SCOPE
1.1 This specification covers requirements for centrifugal castings of copper-base alloys having the nominal compositions shown in Table 1.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 non-conformance with the standard.
1.3 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.
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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: B271/B271M − 23
Standard Specification for
1
Copper-Base Alloy Centrifugal Castings
This standard is issued under the fixed designation B271/B271M; 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* 3. Terminology
3.1 Definitions of terms relating to copper alloys can be
1.1 This specification covers requirements for centrifugal
found in Terminology B846.
castings of copper-base alloys having the nominal composi-
tions shown in Table 1.
4. Ordering Information
1.2 The values stated in either SI units or inch-pound units
4.1 Orders for centrifugal castings under this specification
are to be regarded separately as standard. The values stated in
should include the following information:
each system may not be exact equivalents; therefore, each
4.1.1 Specification title, number, and year of issue;
system shall be used independently of the other. Combining
4.1.2 Quantity (length or number) of castings;
values from the two systems may result in non-conformance
4.1.3 Copper Alloy UNS Number (Table 1) and temper
with the standard.
(as-cast, heat-treated, and so forth);
1.3 This international standard was developed in accor-
4.1.4 Dimensions or drawing number and condition (as-
dance with internationally recognized principles on standard-
cast, machined, and so forth);
ization established in the Decision on Principles for the
4.1.5 ASME Boiler and Pressure Vessel Code requirements
Development of International Standards, Guides and Recom-
(Section 9); and
mendations issued by the World Trade Organization Technical
4.1.6 When castings are purchased for agencies of the U.S.
Barriers to Trade (TBT) Committee.
Government, the Supplementary Requirements in Specification
B824 may be specified.
2. Referenced Documents
4.2 The following are optional and should be specified in
2.1 The following documents in the current issue of the
the purchase order when required:
Book of Standards form a part of this specification to the extent
4.2.1 Pressure test or soundness requirements (Specification
referenced herein:
B824),
2
2.2 ASTM Standards: 4.2.2 Approval of weld repair (Section 8),
B208 Practice for Preparing Tension Test Specimens for
4.2.3 Certification (Specification B824),
Copper Alloy Sand, Permanent Mold, Centrifugal, and 4.2.4 Foundry test report (Specification B824),
Continuous Castings
4.2.5 Witness inspection (Specification B824),
B824 Specification for General Requirements for Copper 4.2.6 Product marking (Specification B824), and
Alloy Castings
4.2.7 Castings for seawater service (Section X1.2).
B846 Terminology for Copper and Copper Alloys
5. Materials and Manufacture
E10 Test Method for Brinell Hardness of Metallic Materials
3
5.1 Castings in Copper Alloy UNS No. C95520 are used in
2.3 ASME Code:
the heat-treated condition only.
Boiler and Pressure Vessel Code
5.2 For improved corrosion resistance for sea water
applications, castings of Copper Alloy UNS No. C95800 may
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper
be given a temper anneal heat treatment at 1200 °F to 1300 °F
and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on
Castings and Ingots for Remelting.
[650 °C to 705 °C] for 6 h minimum. Cooling shall be by the
Current edition approved Oct. 1, 2023. Published October 2023. Originally
fastest means possible that will not cause excess distortion or
approved in 1954. Last previous edition approved in 2018 as B271/B271M – 18.
racking. Propeller castings shall be exempt from this require-
DOI: 10.1520/B0271_B0271M-23.
2
ment.
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
6. Chemical Composition
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.1 The centrifugal castings shall conform to the chemical
3
Available from American Society of Mechanical Engineers (ASME), ASME
requirement shown in Table 2 for the Copper Alloy UNS
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org. Numbers specified in the purchase order.
*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
---------------------- Page: 1 ----------------------
B271/B271M − 23
TABLE 1 Nominal Compositions
Copper Alloy
...
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: B271/B271M − 18 B271/B271M − 23
Standard Specification for
1
Copper-Base Alloy Centrifugal Castings
This standard is issued under the fixed designation B271/B271M; 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 establishescovers requirements for centrifugal castings of copper-base alloys having the nominal
compositions shown in Table 1.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 non-conformance with the standard.
1.3 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 The following documents in the current issue of the Book of Standards form a part of this specification to the extent referenced
herein:
2
2.2 ASTM Standards:
B208 Practice for Preparing Tension Test Specimens for Copper Alloy Sand, Permanent Mold, Centrifugal, and Continuous
Castings
B824 Specification for General Requirements for Copper Alloy Castings
B846 Terminology for Copper and Copper Alloys
E10 Test Method for Brinell Hardness of Metallic Materials
3
2.3 ASME Code:
Boiler and Pressure Vessel Code
3. Terminology
3.1 Definitions of terms relating to copper alloys can be found in Terminology B846.
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on Castings
and Ingots for Remelting.
Current edition approved Oct. 1, 2018Oct. 1, 2023. Published October 2018October 2023. Originally approved in 1954. Last previous edition approved in 20152018 as
B271/B271MB271/B271M – 18.–15. DOI: 10.1520/B0271_B0271M–18.10.1520/B0271_B0271M-23.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.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
---------------------- Page: 1 ----------------------
B271/B271M − 23
TABLE 1 Nominal Compositions
Copper Alloy Commercial Alum- Mang-
Classification Copper Tin Lead Zinc Nickel Iron Silicon
UNS No. Designation inum anese
Leaded red brass C83600 85-5-5-5 85 5 5 5 . . . . .
C83800 83-4-6-7 or commercial red brass 83 4 6 7 . . . . .
Leaded semi-red brass C84400 81-3-7-9 or valve composition 81 3 7 9 . . . . .
1 1 1 1
C84800 76-2 ⁄2-6 ⁄2-15 or semi-red brass 76 2 ⁄2 6 ⁄2 15 . . . . .
Leaded yellow brass C85200 high copper yellow brass 72 1 3 24 . . . . .
C85400 commercial No. 1 yellow brass 67 1 3 29 . . . . .
A
Yellow brass C85470 62.5 2.5 . 34.3 . . 0.5 . .
Leaded yellow brass C85700 leaded naval brass 61 1 1 37 . . . . .
Manganese bronze C86100 manganese bronze 67 . . . . 3 5 4 .
High-strength yellow brass C86200 high-strength manganese bronze 63 . . 27 . 3 4 3 .
C86300 high-strength manganese bronze 61 . . 27 . 3 6 3 .
1 1
C86400 leaded manganese bronze 58 1 1 38 . 1 ⁄2 ⁄2 .
C86500 No. 1 manganese bronze 58 . . 39 . 1 1 1 .
C86700 leaded manganese bronze 58 1 1 34 . 2 2 2 .
Silicon bronze and silicon C87300 silicon bronze 95 . . . . . . 1 4
1 1
brass C87400 silicon brass 82 . ⁄2 14 . . . . 3 ⁄2
C87500 silicon brass 82 . . 14 . . . . 4
C87600 silicon bronze 89 . . 6 . . . . 5
Tin bronze and leaded C90300 88-8-0-4, or modified “G” bronze 88 8 . 4 . . . . .
tin bronze C90500 88-10-0-2, or “G” bronze 88 10 . 2
...
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