1、Designation:B82315Standard Specification forMaterials for Copper Base Powder Metallurgy(PM)Structural Parts1This standard is issued under the fixed designation B823;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers a variety of copper basepowder metallurgy(PM)structural materials,including thoseused in applications wh
3、ere high electrical conductivity isrequired.It includes a classification system,or material desig-nation code.With the classification system,this specificationincludes chemical composition and minimum tensile yieldstrength.NOTE1Paragraphs 6.1 and 8.1 govern material classification by thedesignation
4、code.The classification system is explained in the Appendix.NOTE2Materials classified as C-0000 are expected to be used inapplications where high electrical conductivity is required.1.2 With the exception of density values,for which thecubic centimetre(g/cm3)unit is the industry standard,thevalues s
5、tated in inch-pound units are to be regarded as thestandard.Values in SI units result from conversion.They maybe approximate and are for information only.2.Referenced Documents2.1 ASTM Standards:2B243 Terminology of Powder MetallurgyB925 Practices for Production and Preparation of PowderMetallurgy(P
6、M)Test SpecimensB962 Test Methods for Density of Compacted or SinteredPowder Metallurgy(PM)Products Using ArchimedesPrincipleB963 Test Methods for Oil Content,Oil-ImpregnationEfficiency,and Surface-Connected Porosity of SinteredPowder Metallurgy(PM)Products Using ArchimedesPrincipleE8 Test Methods f
7、or Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 MPIF Standard:MPIF Standard 35,Materials Standards for PM StructuralParts33.Terminology3.1 DefinitionsDefinitions of powder metallurgy termscan be found in Te
8、rminology B243.Additional descriptiveinformation is available in the Related Materials section of Vol02.05 of the Annual Book of ASTM Standards.4.Ordering Information4.1 Materials for parts covered by this specification shall beordered by materials designation code.4.2 Orders for parts under this sp
9、ecification may include thefollowing information:4.2.1 Certification,if required(see Section 13),4.2.2 Dimensions(see Section 9),4.2.3 Chemical composition(see 6.1,10.1,and Table 1),4.2.4 Test methods and mechanical properties(see 8.2,8.3,Table 2,Table X1.1,and Table X1.2),4.2.5 Density(see 7.1 and
10、Table 3),4.2.6 Porosity and oil content(see 7.3),4.2.7 Electrical properties(see 7.3 and Table X2.1),and4.2.8 Special packaging,if required.5.Materials and Manufacture5.1 Structural parts shall be made by compacting andsintering metal powders.Parts may also be made by repressingand resintering sinte
11、red parts,if necessary,to produce finishedparts in conformance with the requirements of this specifica-tion.6.Chemical Composition6.1 The material shall conform to the requirements providedin Table 1.6.2 Chemical analysis shall be performed in accordancewith the methods prescribed in Vol 03.05 of th
12、e Annual Book1This test method is under the jurisdiction of ASTM Committee B09 on MetalPowders and Metal Powder Products and is the direct responsibility of Subcom-mittee B09.05 on Structural Parts.Current edition approved Oct.1,2015.Published November 2015.Originallyapproved in 1992.Last previous e
13、dition approved in 2009 as B823 09.DOI:10.1520/B0823-15.2For 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.3Available
14、 from Metal Powder Industries Federation(MPIF),105 College Rd.East,Princeton,NJ 08540,http:/www.mpif.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 States1 of ASTM Standards,or
15、 by any other approved method agreedupon between the producer and the purchaser.NOTE3Iron contamination should be avoided.Iron in solid solutionin copper has a deleterious effect on both electrical and thermal conduc-tivity.Iron not in solid solution(admixed)has a much lesser effect onconductivity.A
16、n example of the effect of iron on conductivity is shown inFig.X2.1.7.Physical Properties7.1 Density:7.1.1 High Electrical Conductivity Application:In applica-tions where high electrical conductivity is required,if thedensity does not vary more than 0.3 g/cm3from one section ofthe structural part to any other section,the overall density shallfall within the limits prescribed in Table 3.If the density variesmore than 0.3 g/cm3from one section of the part to another,theproducer and the purchaser s