ASTM B369/B369M-20

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: B369 − 09 (Reapproved 2016) B369/B369M − 20
Standard Specification for
Copper-Nickel Alloy Castings
This standard is issued under the fixed designation B369;B369/B369M; 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-nickel alloy castings with nominal compositions shown in Table
1. These are as follows:
Copper Alloy UNS No. Previous Designation
C96200 Alloy A
C96400 Alloy B
1.2 Castings of these alloys are used primarily for corrosion-resistance applications such as in construction and for or pressure
vessels, particularly infor marine pumps, valves, and fittings.
1.3 These alloys are considered weldable, but they may be ordered with a weld test to ensure weldability. When extensive
welding is to be performed on the casting, weldability tests should be specified in the ordering information (5.2.6) to ensure proper
welding characteristics.
1.4 Units—The values stated in either inch-pound units or SI units are to be regarded as standard. The values given in
parentheses are mathematical conversions to SI units that are provided for information only and are not considered
standard.separately as standard. Within the text, SI units are shown in brackets. 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.
1.5 The following hazard statement applies only to Section 8, Weldability Test, of 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
limitations prior to use.
1.6 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:
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
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 ASME Code:
ASME Boiler and Pressure Vessel Code
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 April 1, 2016April 1, 2020. Published May 2016April 2020. Originally approved in 1961. Last previous edition approved in 20092016 as
B369 – 09.B369 – 09 (2016). DOI: 10.1520/B0369-09R16.10.1520/B0369_B0369M–20.
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.
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
B369/B369M − 20
TABLE 1 Nominal Compositions
Composition, %
Copper Alloy UNS No.
Copper Nickel Iron Silicon Manganese Niobium
C96200 87.5 10.0 1.5 0.1 0.9 .
C96400 67.0 30.0 0.7 0.5 0.8 1.0
2.3 AWS Standard:
AWS A5.6 Specification for Copper and Copper-Alloy Arc-Welding Electrodes
3. General Requirements
3.1 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.
3.1.1 Terminology (Section 3),
3.1.2 Other Requirements (Section 7),
3.1.3 Dimensions, Mass, and Permissible Variations (Section 8),
3.1.4 Workmanship, Finish, and Appearance (Section 9),
3.1.5 Sampling (Section 10),
3.1.6 Number of Tests and Retests (Section 11),
3.1.7 Specimen Preparation (Section 12),
3.1.8 Test Methods (Section 13),
3.1.9 Significance of Numerical Limits (Section 14),
3.1.10 Inspection (Section 15),
3.1.11 Rejection and Rehearing (Section 16),
3.1.12 Certification (Section 17),
3.1.13 Test Report (Section 18),
3.1.14 Product Marking (Section 19), and
3.1.15 Packaging and Package Marking (Section 20).
4. Terminology
4.1 For definitions of terms relating to copper alloys, refer to Terminology B846.
5. Ordering Information
5.1 Orders for castings under this specification should include the following information:
5.1.1 Specification title, number, and year of issue;
5.1.2 Quantity of castings;
5.1.3 Copper Alloy UNS Number (Table 2);
5.1.4 Pattern or drawing number and condition (as-cast, machined, and so forth);
5.1.5 ASME Boiler and Pressure Vessel Code Requirements (Section 12); and
5.1.6 When material is purchased for agencies of the U.S. Government, the Supplementary Requirements of this specification
may be specified.
TABLE 2 Chemical Requirements
Copper Alloy UNS No. Copper Alloy UNS No.
C96200 C96400
Min, % Max, % Min, % Max, %
Copper balance balance
Lead . 0.01 . 0.01
Iron 1.0 1.8 0.25 1.5
Nickel, incl cobalt 9.0 11.0 28.0 32.0
Manganese . 1.5 . 1.5
Silicon . 0.50 . 0.50
A
Niobium . 1.0 0.50 1.5
Phosphorus . 0.02 . 0.02
Sulfur . 0.02 . 0.02
Carbon . 0.10 . 0.15
A
When product or casting is intended for subsequent welding applications, and so
specified by the purchaser, the niobium content shall be 0.40 % max.
Available from American Welding Society (AWS), 8669 NW 36 St., #130, Miami, FL 33166-6672, http://www.aws.org.
B369/B369M − 20
5.2 The following are optional and should be specified in the purchase order when required:
5.2.1 Pressure test or soundness requirements (Specification B824);
5.2.2 Witness inspection (Specification B824);
5.2.3 Certification (Specification B824);
5.2.4 Foundry test report (Specification B824);
5.2.5 Product marking (Specification B824);
5.2.6 Weldability test (1.3, Section 8, and Table 2); and
5.2.7 Approval of weld procedure and records of repairs (Section 9).
6. Chemical Composition
6.1 The castings shall conform to the chemical requirements 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 may be given as remainder
and may be taken as the difference between the sum of all elements analyzed and 100 %. When all the elements in the table are
analyzed, their sum shall be 99.5 % minimum.
7. Mechanical Properties
7.1 Mechanical properties shall be determined from separately cast test bar castings, and shall meet conform to the requirements
shown in Table 3.
8. Weldability Test
8.1 When specified in the purchase order at least one test cast as shown in Fig. 1 shall be prepared for each lot of welding grade
castings (5.2.6).
8.2 The block shall be molded, gated, and risered in such a manner to produce a sound casting without defects that might
interfere with welding or the interpretation of the results of the test.
8.3 The groove in the test block shall be completely filled with weld deposit metal, using the manual metallic-arc process with
1 5
⁄8-in. (12.7-mm) 0.125 in. [3.18 mm] or ⁄32-in. (3.97-mm) 0.156 in. [3.97 mm] diameter copper-nickel (70-30) coated electrodes
conforming to classification AWS ECuNi of AWS Specification A5.6. The interpass temperature need not be controlled, unless it
is to be controlled in fabrication.
8.4 One ⁄8-in. (9.52-mm) 0.375 in. [9.52 mm] minimum thick bend coupon (see Fig. 2), shall be removed longitudinally from
the center of the welded block by machining, sawing, abrasive cutting, or other suitable means. Cut surfaces and edges should be
sanded smooth if necessary. The side bend side-bend specimen then shall be bent 180° in a guided bend jig around a mandrel 11.5 ⁄2
in. (38.1 mm)[38.1 mm] in diameter with the weld located at the center of the bend.
8.5 Cracks or other open defects exceeding ⁄80.125 in. (3.2 mm) [3.18 mm] measured in any direction in the fusion zone or
heat-affected zone on the convex surface of the specimen after bending shall be cause for rejection. Cracks originating at weld-bead
undercuts, at weld-slag inclusions, or at casting defects shall not be cause for reje
...