ASTM_B_768_-_11_2016.pdf

Designation:B76811(Reapproved 2016)Standard Specification forCopper-Cobalt-Beryllium Alloy and Copper-Nickel-BerylliumAlloy Strip and Sheet1This standard is issued under the fixed designation B768;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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 forcopper-cobalt-beryllium and copper-nickel-beryllium strip andsheet of the following alloys:Nominal Composition,%Copper Alloy UNS No.2BerylliumCobaltNickelC174100.30.5.C174500.3.0.8C174600.3.1.21.2 UnitsValues stated in inch-pound units are to beregarded as the standard.The values given in parentheses aremathematical conversions to SI units,which are provided forinformation only and are not considered standard.1.3 The following safety hazard caveat pertains only to thetest methods described in this specification:1.3.1 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:3B194 Specification for Copper-BerylliumAlloy Plate,Sheet,Strip,and Rolled BarB248 Specification for General Requirements for WroughtCopper and Copper-Alloy Plate,Sheet,Strip,and RolledBarB601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)3.Terminology3.1 For definitions of terms related to copper and copperalloys,refer to Terminology B846.4.General Requirements4.1 The following sections of Specification B248 constitutesa part of this specification4.1.1 Terminology.4.1.2 Materials and Manufacture.4.1.3 Workmanship,Finish,and Appearance.4.1.4 Sampling.4.1.5 Number of Tests and Retests.4.1.6 Specimen Preparation.4.1.7 Test Methods.4.1.8 Significance of Numerical Limits.4.1.9 Inspection.4.1.10 Rejection and Rehearing.4.1.11 Certification.4.1.12 Test Report.4.1.13 Packaging and Marking.4.1.14 Supplementary Requirements.4.2 In addition,when a section with a title identical to thatreferenced in 5.1 appears in this specification,it containsadditional requirements which supplement those appearing inSpecification B248.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand CopperAlloys and is the direct responsibility of Subcommittee B05.01 on Plate,Sheet,and Strip.Current edition approved Oct.1,2016.Published October 2016.Originallyapproved in 1987.Last previous edition approved in 2011 as B76811.DOI:10.1520/B0768-11R16.2The UNS system for copper and copper alloys(see Practice E527)is a simpleexpansion of the former standard designation system accomplished by the additionof a prefix“C”and a suffix“00.”The suffix can be used to accommodatecomposition variations of the base alloy.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Ordering Information5.1 Include the following information when placing ordersfor product under this specification,as applicable:5.1.1 ASTM designation and year of issue,5.1.2 Copper alloy UNS No.designation(1.1),5.1.3 Form of material:strip or sheet,5.1.4 Temper(Section 8),5.1.5 Tension test,if required(Section 9),5.1.6 Dimensions:thickness and width,and length as appli-cable(Section 11),5.1.7 How furnished:rolls,stock lengths with or withoutends,specific lengths with or without ends(Section 11),5.1.8 Type of edge,if required:slit,sheared,sawed,squarecorners,rounded corners,rounded edges,or full rounded edges(see 11.6),5.1.9 Special thickness tolerances,if required(Section 11),5.1.10 Hardness test,if required,5.1.11 Special marking or packaging,if required,5.1.12 Mill test report,if required,5.1.13 Special tests or exceptions,if any,and5.1.14 Certification,if required.5.2 If product is purchased for agencies of the U.S.Gov-ernment(see the Supplement