ASTM B271/B271M-23

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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
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 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
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.
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.
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.
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
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 . . . . .
C92200 88-6-2-4 or “M” bronze 88 6 2 4 . . . . .
C92300 87-8-1-4, or Navy PC 87 8 1 4 . . . . .
High-lead tin bronze C93200 83-7-7-3 83 7 7 3 . . . . .
C93500 85-5-9-1 85 5 9 1 . . . . .
C93600 81-7-12 81 7 12 . . . . . .
C93700 80-10-10 80 10 10 . . . . . .
C93800 78-7-15 78 7 15 . . . . . .
C94300 71-5-24 71 5 24 . . . . . .
Aluminum bronze C95200 Grade A 88 . . . . 3 9 . .
C95300 Grade B 89 . . . . 1 10 . .
C95400 Grade C 85 . . . . 4 11 . .
C95410 84 . . . 2 4 10 . .
C95900 82.5 . . . . 4.5 13 . .
Nickel aluminum bronze C95500 Grade D 81 . . . 4 4 11 . .
C95520 78.5 . . . 5.5 5.0 11 . .
C95800 81.3 . . . 4.5 4 9 1.2 .
Leaded nickel bronze C97300 12 % leaded nickel silver 57 2 9 20 12 . . . .
C97600 20 % leaded nickel silver 64 4 4 8 20 . . . .
C97800 25 % leaded nickel silver 66 5 2 2 25 . . . .
A
Phosphorus 0.13
4. Ordering Information
4.1 Orders for centrifugal castings under this specification should include the following information:
4.1.1 Specification title, number, and year of issue;
4.1.2 Quantity (length or number) of castings;
4.1.3 Copper Alloy UNS Number (Table 1) and temper (as-cast, heat-treated, and so forth);
4.1.4 Dimensions or drawing number and condition (as-cast, machined, and so forth);
4.1.5 ASME Boiler and Pressure Vessel Code requirements (Section 9); and
4.1.6 When castings are purchased for agencies of the U.S. Government, the Supplementary Requirements in Specification B824
may be specified.
4.2 The following are optional and should be specified in the purchase order when required:
4.2.1 Pressure test or soundness requirements (Specification B824),
4.2.2 Approval of weld repair (Section 8),
B271/B271M − 23
4.2.3 Certification (Specification B824),
4.2.4 Foundry test report (Specification B824),
4.2.5 Witness inspection (Specification B824),
4.2.6 Product marking (Specification B824), and
4.2.7 Castings for seawater service (Section X1.2).
5. Materials and Manufacture
5.1 Castings in Copper Alloy UNS No. C95520 are used in the heat-treated condition only.
5.2 For improved corrosion resistance for sea water applications, castings of Copper Alloy UNS No. C95800 may be given a
temper anneal heat treatment at 1200 °F to 1300 °F [650 °C to 705 °C] for 6 h minimum. Cooling shall be by the fastest means
possible that will not cause excess distortion or racking. Propeller castings shall be exempt from this requirement.
6. Chemical Composition
6.1 The centrifugal castings shall conform to the chemical requirement shown in Table 2 for the Copper Alloy UNS Numbers
specified in the purchase order.
6.2 These specification limits do not preclude the presence of other elements. Limits may be established and analysis required for
unnamed elements agreed upon between the manufacturer or supplier and the purchaser. Copper or zinc may be given as remainder
and may be taken as the difference between the sum of all elements analyzed and 100 %. When all named elements in Table 2 are
analyzed, their sum shall be as specified in Table 3.
7. Mechanical Properties
7.1 Mechanical properties shall be determined from test bar castings cast in accordance with Practice B208 and shall meet the
requirements shown in Table 4.
8. Weld Repair
8.1 The castings shall not be weld repaired without customer approval.
9. ASME Requirements
9.1 When specified in the purchase order to meet ASME Boiler and Pressure Vessel Code requirements castings in Copper Alloy
UNS Nos. C95200 and C95400 shall comply with the following:
9.1.1 Certification requirements of Specification B824.
9.1.2 Foundry test report requirements of Specification B824.
9.1.3 Castings shall be marked with the manufacturer’s name, the Copper Alloy UNS No., and the casting quality factor. In
addition, heat numbers or serial numbers that are traceable to heat numbers shall be marked on all pressure-containing castings
individually weighing 50 lb [22.7 kg] or more. Pressure-containing castings weighing less than 50 lb [22.7 kg] shall be marked
with either the heat number or a serial number that will identify the casting as to the month in which it was poured. Marking shall
be in such a position as to not injure the usefulness of the casting.
10. General Requirements
10.1 The following sections of Specification B824 form a part of this specification. In the event of a conflict between this
specification and Specification B824, the requirements of this specification shall take precedence.
B271/B271M − 23
TABLE 2 Chemical Requirements
Composition, % max Except as Indicated
Copper Alloy Nickel incl
Copper Tin Lead Zinc Iron Aluminum Manganese Antimony Sulfur Phosphorus Other Silicon
UNS No. Cobalt
A B
C83600 84.0–86.0 4.0–6.0 4.0–6.0 4.0–6.0 0.30 1.0 0.005 . 0.25 0.08 0.05 . 0.005
A B
C83800 82.0–83.8 3.3–4.2 5.0–7.0 5.0–8.0 0.30 1.0 0.005 . 0.25 0.08 0.03 . 0.005
A B
C84400 78.0–82.0 2.3–3.5 6.0–8.0 7.0–10.0 0.40 1.0 0.005 . 0.25 0.08 0.02 . 0.005
A B
C84800 75.0–77.0 2.0–3.0 5.5–7.0 13.0–17.0 0.40 1.0 0.005 . 0.25 0.08 0.02 . 0.005
A
C85200 70.0–74.0 0.7–2.0 1.5–3.8 20.0–27.0 0.6 1.0 0.005 . 0.20 0.05 0.02 . 0.05
A
C85400 65.0–70.0 0.50–1.5 1.5–3.8 24.0–32.0 0.7 1.0 0.35 . . . . . 0.05
C85470 60.0–65.0 1.0–4.0 0.09 Rem 0.20 . 0.10–1.0 . . . 0.02–0.25 . .
A
C85700 58.0–64.0 0.50–1.5 0.8–1.5 32.0–40.0 0.7 1.0 0.8 . . . . . 0.05
A
C86100 66.0–68.0 0.20 0.20 Rem 2.0–4.0 . 4.5–5.5 2.5–5.0 . . . . .
A
C86200 60.0–66.0 0.20 0.20 22.0–28.0 2.0–4.0
...