ASTM_B_888_-_B_888M_-_17.pdf

Designation:B888/B888M17Standard Specification forCopper Alloy Strip for Use in Manufacture of ElectricalConnectors or Spring Contacts1This standard is issued under the fixed designation B888/B888M;the number immediately following the designation indicates the yearof 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.1.Scope*1.1 This specification establishes the requirements for cop-per alloy strip for use in the manufacture of electrical connec-tors or spring contacts produced from one of the followingCopper Alloy UNS Nos.2:C14530,C15100,C15500,C17000,C17200,C17410,C17450,C17460,C17500,C17510,C19002,C19010,C19015,C19025,C19210,C19400,C19500,C19700,C23000,C26000,C40810,C40850,C40860,C42200,C42500,C42520,C42600,C50580,C50780,C51000,C51080,C51100,C51180,C51980,C52100,C52180,C52480,C63800,C64725,C65400,C68800,C70250,C70260,C70265,C70310,C70350,C75200,andC76200.1.2 The requirements for the other copper alloys such ascopper-nickel-tin spinodal,UNS C72650,C72700,andC72900,shall be as prescribed in the current edition ofSpecification B740.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3B193 Test Method for Resistivity of Electrical ConductorMaterialsB248 Specification for General Requirements for WroughtCopper and Copper-Alloy Plate,Sheet,Strip,and RolledBarB248M Specification for General Requirements for WroughtCopper and Copper-Alloy Plate,Sheet,Strip,and RolledBar(Metric)B601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB740 Specification for Copper-Nickel-Tin Spinodal AlloyStripB820 Test Method for Bend Test for Determining the Form-ability of Copper and Copper Alloy StripB846 Terminology for Copper and Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE54 Test Methods for Chemical Analysis of Special Brassesand Bronzes(Withdrawn 2002)4E62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)4E75 Test Methods for Chemical Analysis of Copper-Nickeland Copper-Nickel-Zinc Alloys(Withdrawn 2010)4E478 Test Methods for Chemical Analysis of Copper AlloysE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 ISO Standards:5ISO 4744 Copper and Copper AlloysDetermination ofChromium ContentFlame Atomic Absorption Spectro-metric Method1This specification is under the jurisdiction of Committee B05 on Copper andCopper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,Sheet,and Strip.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1998.Last previous edition approved in 2013 as B888/B888M-13.DOI:10.1520/B0888_B0888M-17.2The 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.4The last approved version of this historical standard is referenced onwww.astm.org.5Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 ISO 7602 Copper and Copper AlloysDetermination ofTellurium Content3.Terminology3.1 DefinitionsFor definition of terms used in thisspecification,refer to Terminology B846.4.General Requirements4.1 For product furnished under this specification in Englishunits,the following sections of Specification B248 mustconstitute a part of this specification.For product furnishedunder th