ASTM B271-96

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: B 271 – 96
Standard Specification for
Copper-Base Alloy Centrifugal Castings
This standard is issued under the fixed designation B 271; 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 (e) 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 * 4.2 The following are optional and should be specified in
the purchase order when required:
1.1 This specification establishes requirements for centrifu-
4.2.1 Chemical analysis of residual elements (Section 6.3),
gal castings of copper-base alloys having the nominal compo-
4.2.2 Pressure test or soundness requirements (Specification
sitions shown in Table 1.
B 824),
1.2 The values stated in inch-pound units are the standard.
4.2.3 Approval of weld repair (Section 8),
SI values in parentheses are given for information only.
4.2.4 Certification (Specification B 824),
2. Referenced Documents
4.2.5 Foundry test report (Specification B 824),
4.2.6 Witness inspection (Specification B 824),
2.1 The following documents in the current issue of the
4.2.7 Product marking (Specification B 824), and
Book of Standards form a part of this specification to the extent
4.2.8 Castings for seawater service (Section 5.2).
referenced herein:
2.2 ASTM Standards:
5. Materials and Manufacture
B 208 Practice for Preparing Tension Test Specimens for
5.1 Castings in Copper Alloy UNS Nos. C95300, C95400,
Copper-Base Alloys for Sand, Permanent Mold, Centrifu-
C95410, and C95500 may be supplied in the heat treated
gal, and Continuous Castings
condition to obtain the higher mechanical properties shown in
B 824 Specification for General Requirements for Copper
Table 2. Suggested heat treatments for these alloys and Copper
Alloy Castings
2 Alloy UNS No. C95520 are given in Table 3. Actual practice
B 846 Terminology for Copper and Copper Alloys
may vary by manufacturer.
3. Terminology 5.2 For better corrosion resistance in seawater applications,
castings in Copper Alloy UNS No. C95800 shall be given a
3.1 Definitions of terms relating to copper alloys can be
temper anneal heat treatment at 1250 6 50°F (675 6 10°C) for
found in Terminology B 846.
6 h minimum. Cooling shall be by the fastest means possible
4. Ordering Information
that will not cause distortion or cracking which renders the
castings unusable for the intended application.
4.1 Orders for centrifugal castings under this specification
5.3 Castings in Copper Alloy UNS No. C95900 are nor-
should include the following information:
mally supplied annealed between 1100°F (595°C) and 1300°F
4.1.1 Specification title, number, and year of issue,
(705°C) for 4 h followed by air cooling.
4.1.2 Quantity (length or number) of castings,
5.4 Castings in Copper Alloy UNS No. C95520 are used in
4.1.3 Copper Alloy UNS Number (Table 1) and temper
the heat treated condition only.
(as-cast, heat-treated, etc.),
4.1.4 Dimensions or drawing number and condition (as-
6. Chemical Composition
cast, machined, etc.),
6.1 The centrifugal castings shall conform to the chemical
4.1.5 ASME Boiler and Pressure Vessel Code requirements
requirement shown in Table 4 for the Copper Alloy UNS
(Section 9),
Numbers specified in the purchase order.
4.1.6 When castings are purchased for agencies of the U.S.
6.2 These specification limits do not preclude the presence
Government, the Supplementary Requirements in Specification
of other elements. Limits may be established and analysis
B 824 may be specified.
required for unnamed elements agreed upon between the
manufacturer or supplier and the purchaser. Copper or zinc
This specification is under the jurisdiction of ASTM Committee B05 on Copper
may be given as remainder and may be taken as the difference
and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on
between the sum of all elements analyzed and 100 %. When all
Castings and Ingots for Remelting.
named elements in Table 2 are analyzed, their sum shall be as
Current edition approved Sept. 10, 1996. Published November 1996. Originally
published as B 271 – 54. Last previous edition B 271 – 95.
specified in Table 5.
Annual Book of ASTM Standards, Vol 02.01.
*A Summary of Changes section appears at the end of this standard.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B271–96
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 . . . . .
C85700 leaded naval brass 61 1 1 37 . . . . .
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 . . . .
6.3 It is recognized that residual elements may be present in more. Pressure-containing castings weighing less than 50 lb
cast copper-base alloys. Analysis shall be made for residual (22.7 kg) shall be marked with either the heat number or a
elements only when specified in the purchase order. 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
7. Mechanical Properties
not injure the usefulness of the casting.
7.1 Mechanical properties shall be determined from test bar
10. General Requirements
castings cast in accordance with Practice B 208 and shall meet
the requirements shown in Table 2. 10.1 The following sections of Specification B 824 form a
part of this specification. In the event of a conflict between this
8. Weld Repair
specification and Specification B 824, the requirements of this
8.1 The castings shall not be weld repaired without cus- specification shall take precedence.
tomer approval. 10.1.1 Terminology (Section 3),
10.1.2 Other Requirements (Section 6),
9. ASME Requirements
10.1.3 Dimensions, Mass, and Permissible Variations (Sec-
9.1 When specified in the purchase order to meet ASME tion 7),
Boiler and Pressure Vessel Code requirements castings in 10.1.4 Workmanship, Finish, and Appearance (Section 8),
Copper Alloy UNS Nos. C95200 and C95400 shall comply 10.1.5 Sampling (Section 9),
with the following: 10.1.6 Number of Tests and Retests (Section 10),
9.1.1 Certification requirements of Specification B 824. 10.1.7 Specimen Preparation (Section 11),
9.1.2 Foundry test report requirements of Specification 10.1.8 Test Methods (Section 12),
B 824. 10.1.9 Significance of Numerical Limits (Section 13),
9.1.3 Castings shall be marked with the manufacturer’s 10.1.10 Inspection (Section 14),
name, the Copper Alloy UNS No., and the casting quality 10.1.11 Rejection and Rehearing (Section 15),
factor. In addition, heat numbers or serial numbers that are 10.1.12 Certification (Section 16),
traceable to heat numbers shall be marked on all pressure- 10.1.13 Test Report (Section 17),
containing castings individually weighing 50 lb (22.7 kg) or 10.1.14 Packaging and Package Marking (Section 19), and
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B271–96
TABLE 2 Mechanical Requirements
A
Tensile Strength, min Yield Strength, min
...