ASTM B768-22

Standard Specification for Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Beryllium Alloy Strip and Sheet

ABSTRACT
This specification establishes the requirements for strips and sheets of copper-cobalt-beryllium and copper-nickel-beryllium alloys with Copper Alloy UNS Nos. C17410, C17450, and C17460. The materials for manufacture shall be cast billets or slabs of such purity and soundness as to be suitable for processing by hot-working, cold-working, and annealing to produce a uniform wrought structure in the finished product, which shall be rolled to finished size and heat treated when required to meet temper properties. Products shall be sampled and prepared, then tested accordingly to examine their conformance to dimensional (thickness, length, width, straightness, and edge contours), mechanical (tensile and yield strength, Rockwell hardness, and elongation), electrical conductivity, and chemical composition requirements.
SCOPE
1.1 This specification establishes the requirements for copper-cobalt-beryllium and copper-nickel-beryllium strip and sheet of the following alloys:    
Nominal Composition, %  
Copper Alloy UNS No.  
Beryllium  
Cobalt  
Nickel  
C17410  
0.3  
0.5  
. . .    
C17450  
0.3  
. . .  
0.8  
C17460  
0.3  
. . .  
1.2  
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 The following safety hazard caveat pertains only to the test methods 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, health, and environmental practices and 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2022
• ICS: 77.150.30 - Copper products
• Technical Committee: B05 - Copper and Copper Alloys
• Drafting Committee: B05.01 - Plate, Sheet, and Strip

Standards Content (Sample)

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.
Designation:B768 −22
Standard Specification for
Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Beryllium
1
Alloy Strip and Sheet
This standard is issued under the fixed designation B768; 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.
2
1. Scope* 2.2 ASTM Standards:
B194 SpecificationforCopper-BerylliumAlloyPlate,Sheet,
1.1 This specification establishes the requirements for
Strip, and Rolled Bar
copper-cobalt-beryllium and copper-nickel-beryllium strip and
B248 Specification for General Requirements for Wrought
sheet of the following alloys:
Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled
Nominal Composition, %
Bar
Copper Alloy UNS No. Beryllium Cobalt Nickel
B248M SpecificationforGeneralRequirementsforWrought
Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled
C17410 0.3 0.5 . . .
C17450 0.3 . . . 0.8
Bar (Metric)
C17460 0.3 . . . 1.2
B601 ClassificationforTemperDesignationsforCopperand
1.2 Units—The values stated in inch-pound units are to be
Copper Alloys—Wrought and Cast
regarded as standard. The values given in parentheses are B846 Terminology for Copper and Copper Alloys
mathematical conversions to SI units that are provided for E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
information only and are not considered standard.
E18 Test Methods for Rockwell Hardness of Metallic Ma-
1.3 The following safety hazard caveat pertains only to the
terials
test methods described in this specification:
E255 Practice for Sampling Copper and Copper Alloys for
1.3.1 This standard does not purport to address all of the
the Determination of Chemical Composition
safety concerns, if any, associated with its use. It is the
E1004 Test Method for Determining Electrical Conductivity
responsibility of the user of this standard to establish appro-
Using the Electromagnetic (Eddy Current) Method
priate safety, health, and environmental practices and deter-
3. Terminology
mine the applicability of regulatory limitations prior to use.
3.1 For definitions of terms related to copper and copper
1.4 This international standard was developed in accor-
alloys, refer to Terminology B846.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. General Requirements
Development of International Standards, Guides and Recom-
4.1 The following sections of Specification B248 or B248M
mendations issued by the World Trade Organization Technical
constitute a part of this specification:
Barriers to Trade (TBT) Committee.
4.1.1 Terminology
4.1.2 Materials and Manufacture
2. Referenced Documents
4.1.3 Workmanship, Finish, and Appearance
2.1 The following documents of the issue in effect on date
4.1.4 Sampling
of material purchase form a part of this specification to the
4.1.5 Number of Tests and Retests
extent referenced herein:
4.1.6 Specimen Preparation
4.1.7 Test Methods
4.1.8 Significance of Numerical Limits
1
ThisspecificationisunderthejurisdictionofASTMCommitteeB05onCopper
andCopperAlloysandisthedirectresponsibilityofSubcommitteeB05.01onPlate,
2
Sheet, and Strip. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2022. Published May 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1987. Last previous edition approved in 2016 as B768–11 (2016). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0768-22. 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
1

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B768−22
4.1.9 Inspection 6.3.1 Slit edges shall be furnished unless otherwise speci-
4.1.10 Rejection and Rehearing fied in the contract or purchase order.
4.1.11 Certification
7. Chemical Composition
4.1.12 Test Report
4.1.13 Product Identification
7.1 The material shall conform to the chemical composition
4.1.14 Packaging and Package Marking
requirementsinTable1forthecopperalloyUNSNo.specified
4.1.15 Supplementary Requirements
in the ordering information.
7.1.1 Resultsofanalysisonachecksampleshallconformto
4.2 In addition, when a section with a title identical to that
the composition requirements within the permit
...

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: B768 − 11 (Reapproved 2016) B768 − 22
Standard Specification for
Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Beryllium
1
Alloy Strip and Sheet
This standard is issued under the fixed designation B768; 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 and copper-nickel-beryllium strip and sheet of the
following alloys:
Nominal Composition, %
Copper Alloy UNS No. Beryllium Cobalt Nickel
C17410 0.3 0.5 . . .
C17450 0.3 . . . 0.8
C17460 0.3 . . . 1.2
1.2 Units—Values The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are
mathematical conversions to SI units, whichunits that are provided for information only and are not considered standard.
1.3 The following safety hazard caveat pertains only to the test methods 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 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 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
1
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
Sheet, and Strip.
Current edition approved Oct. 1, 2016May 1, 2022. Published October 2016May 2022. Originally approved in 1987. Last previous edition approved in 20112016 as
B768–11. –11 (2016). DOI: 10.1520/B0768-11R16.10.1520/B0768-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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
1

---------------------- Page: 1 ----------------------
B768 − 22
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B248 Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
B248M Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
(Metric)
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
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
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E527E1004 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)Test Method for Determining
Electrical Conductivity Using the Electromagnetic (Eddy Current) Method
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
4. General Requirements
4.1 The following sections of Specification B248 constitutesor B248M constitute a part of this specificationspecification:
4.1.1 Terminology.Terminology
4.1.2 Materials and Manufacture.Manufacture
4.1.3 Workmanship, Finish, and Appearance.Appearance
4.1.4 Sampling.Sampling
4.1.5 Number of Tests and Retests.Retests
4.1.6 Specimen Preparation.Preparation
4.1.7 Test Methods.Methods
4.1.8 Significance of Numerical Limits.Limits
4.1.9 Inspection.Inspection
4.1.10 Rejection and Rehearing.Rehearing
4.1.11 Certification.Certification
4.1.12 Test Report.Report
4.1.13 Product Identifi
...