ASTM_F_2886_-_10.pdf

Designation:F288610Standard Specification forMetal Injection Molded Cobalt-28Chromium-6MolybdenumComponents for Surgical Implant Applications1This standard is issued under the fixed designation F2886;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.1.Scope1.1 This specification covers the chemical,mechanical,andmetallurgical requirements for metal injection molded(MIM)cobalt-28chromium-6molybdenum components to be used inthe manufacture of surgical implants1.2 The MIM components covered by this specification mayhave been densified beyond their as-sintered density by post-sinter processing.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.2.Referenced Documents2.1 ASTM Standards:2B243 Terminology of Powder MetallurgyB311 Test Method for Density of Powder Metallurgy(PM)Materials Containing Less Than Two Percent PorosityB923 Test Method for Metal Powder Skeletal Density byHelium or Nitrogen PycnometryE3 Guide for Preparation of Metallographic SpecimensE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE354 Test Methods for Chemical Analysis of High-Temperature,Electrical,Magnetic,and Other Similar Iron,Nickel,and Cobalt AlloysE407 Practice for Microetching Metals and AlloysF75 Specification for Cobalt-28 Chromium-6 MolybdenumAlloy Castings and Casting Alloy for Surgical Implants(UNS R30075)F601 Practice for Fluorescent Penetrant Inspection of Me-tallic Surgical ImplantsF629 Practice for Radiography of Cast Metallic SurgicalImplantsF1537 Specification for Wrought Cobalt-28Chromium-6Molybdenum Alloys for Surgical Implants(UNSR31537,UNS R31538,and UNS R31539)SI 10 American National Standard for Use of the Interna-tional System of Units(SI):The Modern Metric System2.2 ISO Standards:3ISO 6892 Metallic Materials Tensile Testing at AmbientTemperatureISO 9001 Quality Management SystemsRequirements2.3 AMS Standards:4AMS 2269 Chemical Check Analysis Limits,Nickel,NickelAlloys and Cobalt AlloysAMS 2248 Chemical Check Analysis Limits,Corrosion andHeat Resistant Steels and Alloys,Maraging and OtherHighly-Alloyed Steels,and Iron Alloys2.4 MPIF Standards:5MPIF Standard 10 Determination of the Tensile Properties ofPowder Metallurgy MaterialsMPIF Standard 42 Determination of Density of Compactedor Sintered Powder Metallurgy ProductsMPIF Standard 50 Preparing and Evaluating Metal InjectionMolded Sintered/Heat Treated Tension SpecimensMPIF Standard 63 Density Determinations of MIM Compo-nents(Gas Pycnometry)MPIF Standard 64 Terms Used in Metal Injection Molding3.Terminology3.1 Definitions of Terms Specific to This Standard:1This specification is under the jurisdiction of ASTM Committee F04 onMedical and Surgical Materials and Devices and is the direct responsibility ofSubcommittee F04.12 on Metallurgical Materials.Current edition approved Dec.1,2010.Published January 2011.DOI 10.1520/F288610.2For 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 from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from American Society for Quality(ASQ),600 N.Plankinton Ave.,Milwaukee,WI 53203,http:/www.asq.org.5Available from Metal Powder Industries Federation(MPIF),105 College RoadEast,Princeton,New Jersey 08540,http:/www.mpif.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2 Definitions of powder metallurgy and MIM terms can befound in Terminology B243 and MPIF Standard 64.Additionaldescriptive information is available in the Related MaterialSection of Vol.02.05 of the Annual Book of ASTM Standards.3.3 absolute density,nthe value of density used to char-acterize a powder material with a particular chemical compo-sition as if it were a fully dense material,completely free ofporosity.3.3.1 DiscussionFor purposes of this specification,theskeletal density(also referred to as pycnometer density)measured on the raw material powders using the pycnometrymethod of Test Method B923 will be used to represent theabsolute density of the particular chemical composition.3.4 debinding,na step between molding and sinteringwhere the majority of the binder used in molding is ex