ASTM B441-22

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: B441 − 16 B441 − 22
Standard Specification for
Copper-Cobalt-Beryllium, Copper-Nickel-Beryllium, and
Copper-Nickel-Lead-Beryllium Copper-Cobalt-Beryllium
Alloy, Copper-Nickel-Beryllium Alloy, Copper-Nickel-Lead-
Beryllium Alloy, and Copper-Nickel-Cobalt Alloy Rod and
Bar (UNS Nos. C17500, C17510, and C17465)
This standard is issued under the fixed designation B441; 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-cobalt-beryllium alloy (UNS No. C17500), copper-nickel-beryllium
alloy (UNS No. C17510), and copper-nickel-lead-beryllium alloy (UNS No. C17465) Copper Alloy UNS Nos. C17500, C17510,
C17540, and C17465 rod and bar in straight lengths.
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, which are provided for information only and are not considered standard.
1.3 The following safety hazard caveat pertains only to the test method(s) described in this specification.
1.3.1 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 to determine the
applicability of regulatory limitations prior to use.
1.4 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:
B193 Test Method for Resistivity of Electrical Conductor Materials
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B249/B249M Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings
B846 Terminology for Copper and Copper Alloys
E8/E8M Test Methods for Tension Testing of Metallic Materials
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod, Bar,
Wire, Shapes and Forgings.
Current edition approved Oct. 1, 2016Nov. 1, 2022. Published November 2016November 2022. Originally approved in 1966. Last previous edition approved in 20102016
as B441–04(2010).B441–16. DOI: 10.1520/B0441-16.10.1520/B0441-22.
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.
*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
B441 − 22
E18 Test Methods for Rockwell Hardness of Metallic Materials
E1004 Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method
3. General Requirements
3.1 The following sections of Specification B249/B249M constitute a part of this specification:
3.1.1 Terminology,Terminology
3.1.2 Materials and Manufacture,Manufacture
3.1.3 Dimensions and Permissible Variations,Variations
3.1.4 Workmanship, Finish, and Appearance,Appearance
3.1.5 Sampling,Sampling
3.1.6 Number of Tests and Retests,Retests
3.1.7 Specimen Preparation,Preparation
3.1.8 Test Methods,Methods
3.1.9 Significance of Numerical Limits,Limits
3.1.10 Inspection,Inspection
3.1.11 Rejection and Rehearing,Rehearing
3.1.12 Certification,Certification
3.1.13 Test Report,Report
3.1.14 Packaging and Package Marking, andMarking
3.1.15 Supplementary Requirements.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 that supplement those appearing in Specification B249/B249M.
4. Terminology
4.1 For definition of terms related to copper and copper alloys, refer to Terminology B846.
5. Ordering Information
5.1 Include the following specified choices when placing orders for product under this specification, as applicable:
5.1.1 ASTM designation and year of issue,
5.1.2 Copper [Alloy]Alloy UNS No. designation,
5.1.3 Temper (Section 7),
5.1.4 Form of product (cross section such as round, hexagonal, octagonal, rectangular, or square),
5.1.5 Dimensions (diameter or distance between parallel surfaces),
B441 − 22
5.1.6 Edge contours,
5.1.7 Length,
5.1.8 Quantity—total weight, or total length, or number of pieces for each form, temper, size, and copper alloy,
5.1.9 Intended application.
5.2 The following options are available but may not be included unless specified at the time of placing of the order when required:
5.2.1 Heat identification or traceability details (Specification details,B249/B249M),
5.2.2 Tensile strength test (9.1),
5.2.3 Certification (Specification Certification,B249/B249M),
5.2.4 Mill Test Report (Specification Report,B249/B249M),
5.2.5 When product is purchased for agencies of the U.S. government.government, see the Supplementary Requirements section
of B249/B249M for additional requirements, if specified.
6. Chemical Composition
6.1 The material shall conform to the chemical composition requirements in Table 1 for the copper [alloy]alloy UNS No.
designation specified in the ordering information.
6.1.1 Results of analysis on a check sample shall conform to the composition requirements within the permitted analytical variance
specified in Table 1.
6.1.2 These composition limits do not preclude the presence of other elements. By agreement between manufacturer and
purchaser, limits may be established and analysis required for unnamed elements.
TABLE 1 Chemical Composition
Concentration, %
Copper Alloy Copper Alloy Copper Alloy
Element UNS No. UNS No. UNS No.
C17500 C17510 C17465
Beryllium 0.4–0.7 0.2–0.6 0.15–0.50
Cobalt 2.4–2.7 0.3 max .
A
Nickel . 1.4–2.2 1.0–1.4
Iron, max 0.10 0.10 0.20
Aluminum, max 0.20 0.20 0.20
Silicon, max 0.20 0.20 0.20
Tin, max . . 0.25
Zirconium, max . . 0.50
Lead . . 0.20–0.6
Copper remainder remainder remainder
TABLE 1 Chemical Requirements
Composition, %
Copper Alloy UNS No.
Element C17500 C17510 C17540 C17465
Beryllium 0.4–0.7 0.2–0.6 0.4–0.7 0.15–0.50
Cobalt 2.4–2.7 0.3 max 0.8–1.3 .
A
Nickel . 1.4–2.2 0.8–1.3 1.0–1.4
Iron, max 0.10 0.10 0.2 0.20
Aluminum, max 0.20 0.20 . 0.20
Silicon, max 0.20 0.20 0.2 0.20
Tin, max . . . 0.25
Zirconium, max . . . 0.50
Lead . . . 0.20–0.6
Copper remainder remainder remainder remainder
A
Incl. Co.
B441 − 22
TABLE 4 Precipitation Heat-Treatment Time for Acceptance Tests
Copper Alloy UNS
Temper Designation
Copper Alloy UNS Nos. C17510, C17540, and C17465
No. C17500 at
at
A
900 °F (482 °C), h 850 °F (454 °C) or
Standard Former
A
900 °F (482 °C), h
TB00 Solution Heat-Treated (A) 3 3
TD04 Solution Heat-Treated and Cold-Worked: Hard (H) 2 2
A
Specific temperature used must conform with supplier’s certification.
6.2 For the alloys in which copper is listed as the “remainder,” copper is the difference between the sum of results forof all
elements determined and 100 %. When all elements specified in Table 1 are determined, the sum of results shall be 99.5 % min.
7. Temper
7.1 The standard tempers for products described in this specification are given in Table 2, Table 3, and and Table 43.
7.1.1 TB00 (solution heat treated (A),
7.1.2 TF00 (precipitation hardened (AT),
7.1.3 TD04 (solution heat treated and cold worked: hard (H),
7.1.4 TH04 (hard and precipitation heat treated (HT).
NOTE 1—Although not produced under this specification, non-standard tempers are available by special order and the properties of such product are
subject to negotiation between the manufacturer and the purchaser.
8. Physical Property Requirements
8.1 Electrical Conductivity: Conductivity Requirement:
8.1.1 Electrical conductivity shall be the product accept/reject criterion when tested in accordance with Test Method E1004 for
product equal to or larger than ⁄8 in. (9.5 mm) in nominal diameter or distance between parallel surfaces and other shapes having
2 2
a nominal cross-sectional area equal to or exceeding 0.141 in. (91 mm ).
8.1.2 The electrical conductivity requirements are given in Table 2 and Table 3.
8.1.3 The product furnished shall conform to the electrical conductivity requirement prescribed in Electrical resistivity shall be
the product acceptance criterion Table 2 and Table 4 for the applicable temper, when tested in accordance with Test Method
E1004B193 for product equal to and greater smaller than ⁄8 in. in. (9.5 mm) in nominal diameter or distance between parallel
TABLE 2 Tensile Strength and Rockwell HardnessMechanical and Physical Property Requirements for Rod and Bar (C17500, C17510,
A
and C17540)
Temper Designation As Supplied
Electrical
Tensile Strength, Rockwell Hardness,
StandardCode FormerName Conductivity
B
...