ASTM B176-18

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: B176 − 17 B176 − 18
Standard Specification for
Copper-Alloy Die Castings
This standard is issued under the fixed designation B176; 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-alloy die castings. The alloys specified are Copper Alloy UNS
Nos. C85470, C85700, C85800, C86500, C87800, C99700, and C99750.
1.2 Units—The values stated in inch-pound 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.
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 ASTM Standards:
B824 Specification for General Requirements for Copper Alloy Castings
B846 Terminology for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E23 Test Methods for Notched Bar Impact Testing of Metallic Materials
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.2 ADCI/NADCA Standards:
“E” Series Product Standards
2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
2.4 Military Standards:
MIL-STD-129 Marking for Shipment and Storage (Military Agencies)
MIL-P-116 Methods of Preservation
3. General Requirements
3.1 The following sections of Specification B824 constitute a part of this specification.
3.1.1 Terminology (Section 3),
3.1.2 Number of Tests and Retests (Section 11) (Note to users: Paragraph 10.3 of Specification B824 applies only when
mechanical requirements are specified in the purchase order.),
3.1.3 Test Methods (Section 13),
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, 2017March 1, 2018. Published May 2017March 2018. Originally approved in 1942. Last previous edition approved in 20142017 as
B176-14.-17. DOI: 10.1520/B0176-17.10.1520/B0176-18.
The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of a
prefix “C” and a suffix “00.” The suffix can be used to accommodate composition variations of the base alloy.
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 North American Die Casting Association (NADCA), 3250 Arlington Heights Rd., Suite 101, Arlington Heights, IL 60004, http://
www.diecasting.org.http://www.diecasting.org.
Available from DLA Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/http://quicksearch.dla.mil/.
*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
B176 − 18
3.1.4 Significance of Numerical Limits (Section 14),
3.1.5 Inspection (Section 15),
3.1.6 Rejection and Rehearing (Section 16),
3.1.7 Certification (Section 17),
3.1.8 Test Report (Section 18),
3.1.9 Product Marking (Section 19), and
3.1.10 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 B824.
4. Terminology
4.1 For general terms related to copper and copper alloys, refer to Terminology B846.
5. Ordering Information
5.1 Include the following information when placing orders for die castings under this specification as applicable:
5.1.1 Specification title, number, and year of issue,
5.1.2 Part name and number,
5.1.3 Copper Alloy UNS Number,
5.1.4 Quantity and delivery schedule, as required,
5.1.5 Engineering drawing of die casting, when required, giving all necessary dimensions and tolerances and showing latest
revisions and allowances for machining, if any. Location of ejector pin marks or parting lines shall be at the option of the
manufacturer unless specifically designated on the drawing.
5.1.6 When die castings are purchased for agencies of the U.S. Government the Supplementary Requirements of Specification
B824 may be specified.
5.2 The following requirements are optional and should be specified in the purchase order when required.
5.2.1 Inspection lot sampling (Section 9),
5.2.2 Soundness requirements (10.1),
5.2.3 Mechanical requirements (Section 7),
5.2.4 Special requirements (Section 10),
5.2.5 Certification (Specification B824),
5.2.6 Foundry test report (Specification B824),
5.2.7 Witness inspection (Specification B824),
TABLE 1 Chemical Requirements
Composition, % max (unless shown as a range or min)
Copper
Alloy
Nickel
UNS
Copper Tin Lead Zinc Iron including Aluminum Manganese Antimony SulfurPhosphorus Silicon
No.
Cobalt
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 B
C85800 57.0 min 1.5 1.5 31.0–41.0 0.50 0.50 0.55 0.25 0.05 0.05 0.01 0.25
A
C86500 55.0–60.0 1.0 0.40 36.0–42.0 0.40–2.0 1.0 0.50–1.5 0.10–1.5 . . . .
A B,C
C87800 80.0 min 0.25 0.09 12.0–16.0 0.15 0.20 0.15 0.15 0.05 0.05 0.01 3.8–4.2
A
C99700 54.0 min 1.0 2.0 19.0–25.0 1.0 4.0–6.0 0.50–3.0 11.0–15.0 . . . .
D
C99750 55.0–61.0 . 0.50–2.5 17.0–23.0 1.0 5.0 0.25–3.0 17.0–23.0 . . . .
TABLE 1 Chemical Requirements
Copper
Composition, % max (unless shown as a range or min)
Alloy
Nickel
UNS
Copper Tin Lead Zinc Iron Aluminum Manganese Magnesium Antimony Sulfur Phosphorus Silicon Arsenic
No.
C85470 60.0–65.0 1.0–4.0 0.09 Rem 0.20 . 0.10–1.0 . . . . 0.02–0.25 . .
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 B
C85800 57.0 min 1.5 1.5 31.0–41.0 0.50 0.50 0.55 0.25 . 0.05 0.05 0.01 0.25 0.05
A B
C86500 55.0–60.0 1.0 0.40 36.0–42.0 0.40–2.0 1.0 0.50–1.5 0.10–1.5 . . . . . .
B
C87800 80.0 min 0.25 0.09 12.0–16.0 0.15 0.20 0.15 0.15 0.01 0.05 0.05 0.01 3.8–4.2 0.05
C99700 54.0 min 1.0 2.0 19.0–25.0 1.0 4.0–6.0 0.50–3.0 11.0–15.0 . . . . . .
C99750 55.0–61.0 . 0.50–2.5 17.0–23.0 1.0 5.0 0.25–3.0 17.0–23.0 . . . . . .
A
In determining copper min, copper may be determined as copper plus nickel.
B
Arsenic 0.05 max. Nickel value includes Cobalt.
C
Magnesium 0.01 max.
D
Iron content above the nickel content may cause hard spots resulting in decreased machinability.
B176 − 18
5.2.8 Product marking (Specification B824), and
5.2.9 Packaging requirements (Section 12).
6. Chemical Composition
6.1 The castings shall conform to the requirements for major elements as shown in Table 1.
6.2 These specification composition 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 1 are analyzed, their sum shall be as specified in Table 2.
6.3 It is recognized that residual elements may be present in cast copper-base alloys. Analysis shall be made for residual
elements only when specified in the purchase order.
6.4 If the producer’s or supplier’s method of composition control is acceptable, sampling for chemical analysis may be waived
at the discretion of the purchaser.
7. Mechanical Property Requirements
7.1 Unless specified in the purchase order, acceptance of die castings under this specification shall not depend on mechanical
properties determined by tension or impact tests. Table X1.1 shows typical mechanical properties.
7.2 When minimum mechanical properties are specified in the purchase order the mechanical properties shall be agreed upon
between the manufacturer or supplier and the purchaser.
8. Dimensions, Mass, and Permissible Variations
8.1 Permissible variations in dimensions shall be within the limits specified on the drawings or in the contract or purchase order.
8.1.1 Any dimensions for which a tolerance is not
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