Designation:B103/B103M−15StandardSpecificationforPhosphorBronzePlate,Sheet,Strip,andRolledBar1ThisstandardisissuedunderthefixeddesignationB103/B103M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationestablishestherequirementsforcopper-tinalloy(phosphorbronze),copper-tin-leadalloy(leadedphosphorbronze),andcopper-tin-lead-zincalloy(bear-ingbronze),plate,sheet,strip,androlledbar.Thephosphorbronzescommonlyareusedfordeepdrawingintobellowsandstampingandformingintospringdevicesandintoterminalsandconnectorsforelectricalapparatusbecausetheycombinehighstrengthwithhighelongation.Theleadedphosphorbronzesareusedwherestrength,corrosionresistance,andmachinabilityarerequired.Thebearingbronzeisusedinbushings,bearings,andload-bearingthrustwashers.Thefollowingalloysarecovered:CopperAlloyUNSNo.2NominalComposition,%PreviouslyUsedDesignationCopperTinZincLeadC51000955......A1C51100964......AC51180964.........C51900946......C52100A928......CC52180928.........C524009010......DC53400945...1B1C5440088434B2ASAESpecificationCA521conformstotherequirementsofUNSNo.C52100.NOTE1—Alloftheabovealloyscontainsmallamountsofphosphorus,usedasadeoxidantinmelting,andtoenhancethemechanicalproperties.1.2Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,SIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thefollowingsafetyhazardcaveatpertainsonlytothetestmethod(s)describedinthisspecification.1.3.1Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoft...
