Designation:B283/B283M−17StandardSpecificationforCopperandCopper-AlloyDieForgings(Hot-Pressed)1ThisstandardisissuedunderthefixeddesignationB283/B283M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationestablishestherequirementsforcop-perandcopperalloydieforgingsproducedbythehotpressingmethod.Thefollowingcopperandcopperalloysareincluded:CopperorCopperAlloyUNSNo.NameC11000copperC14500copper-telluriumC14700copper-sulfurC27450plumbingbrassC27451plumbingbrassC27453copperzincalloyC28500copper-zincbrassC35330leadedbrassC36500leadedMuntzmetalC37000free-cuttingMuntzmetalC37700forgingbrassC46400navalbrassC46750tinbrassC48200mediumleadednavalbrassC48500leadednavalbrassC48600navalbrassC49250copper-zinc-bismuthalloyC49255copper-zinc-bismuth-nickelalloyC49260copper-zinc-bismuthalloyC49265copper-zinc-tin-bismuth,lowleadedC49300copper-zinc-tin-bismuthalloyC49340copper-zinc-tin-bismuthalloyC49345copper-zinc-tin-bismuth,lowleadedC49350copper-zinc-tin-bismuthalloyC49355bismuthbrassC61900aluminumbronzeC62300aluminumbronze,9%C63000aluminum-nickelbronzeC63200aluminum-nickelbronzeC64200aluminum-siliconbronzeC64210aluminum-siliconbronze,6.7%C65500high-siliconbronze(A)C67500manganesebronze(A)C67600...C69300copper-zinc-siliconC70620copper-nickel90-10C71520copper-nickel70-30C77400nickelsilver,45-10C87700siliconbronzeC87710siliconbronze1.2Units—ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.NOTE1—NominalcompositionandrelativeforgeabilityratingsaregiveninAppendixX1.Copper-nic...
