1、Designation:F7512Standard Specification forCobalt-28 Chromium-6 Molybdenum Alloy Castings andCasting Alloy for Surgical Implants(UNS R30075)1This standard is issued under the fixed designation F75;the number immediately following the designation indicates the year of originaladoption or,in the case
2、of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers the chemical,mechanical,andmetallurgical requirements for cobalt-28 chromi
3、um-6 molyb-denum alloy unfinished investment product castings for surgi-cal implant applications and casting alloy in the form of shot,bar,or ingots to be used in the manufacture of surgicalimplants.This specification does not apply to completedsurgical implants made from castings.1.2 The values sta
4、ted 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.Referen
5、ced Documents2.1 ASTM Standards:2A957 Specification for Investment Castings,Steel andAlloy,Common Requirements,for General Industrial UseE3 Guide for Preparation of Metallographic SpecimensE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE18 Test Methods for Rockwell Hardness of Metalli
6、c 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 All
7、oysE407 Practice for Microetching Metals and AlloysE601 Test Method for Measuring Electromotive Force(emf)Stability of Base-Metal Thermoelement Materials withTime in AirF629 Practice for Radiography of Cast Metallic SurgicalImplantsF981 Practice for Assessment of Compatibility of Biomate-rials for S
8、urgical Implants with Respect to Effect ofMaterials on Muscle and Bone2.2 Aerospace Material Specification:3AMS 2248 Chemical Check Analysis Limits:Corrosion andHeat Resistant Steels and Alloys,Maraging and OtherHighly-Alloyed Steels,and Iron AlloysAMS 2269 Chemical Check Analysis Limits:Nickel,Nick
9、elAlloys and Cobalt Alloys2.3 ISO Standards:4ISO 5832-4 Implants for SurgeryMetallic MaterialsPart4:Cobalt-Chromium-Molybdenum Casting AlloyISO 6892 Metallic MaterialsTensile Testing at AmbientTemperatureISO 9001 Quality Management SystemsRequirements3.Terminology3.1 Definitions of Terms Specific to
10、 This Standard:3.1.1 investment casting,na metal casting that is producedin a mold obtained by investing(surrounding)an expendablepattern with a ceramic slurry that is allowed to solidify.Theexpendable pattern may consist of wax,plastic,or othermaterial and is removed prior to filling the mold with
11、liquidmetal.3.1.2 master heat,na quantity of metal processed in asingle furnace or refining vessel at one time in such a manneras to produce the desired composition and properties.3.1.3 sub-heat,na portion of a master heat remeltedwithout additional processing for pouring into castings.Syn-onyms:mel
12、t,production heat.NOTE1Terminology section in accordance with Specification A957.1This 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
13、 May 15,2012.Published June 2012.Originallyapproved in 1967.Last previous edition approved in 2007 as F75 075.DOI:10.1520/F0075-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information
14、,refer to the standards Document Summary page onthe ASTM website.3Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.or
15、g.*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 4.Ordering Information4.1 Include with inquiries and orders for material under thisspecification the following information:
16、4.1.1 Quantity(number of product castings or weight ofcasting alloy),4.1.2 ASTM designation and date of issue,4.1.3 Units to be certifiedSI or inch-pound.4.1.4 Form(product casting,shot,bar,ingot),4.1.5 Applicable dimensions or drawing number,4.1.6 Condition(as-cast,hot isostatically pressed(HIP),solution annealed,and so forth),4.1.7 Special tests,if any,and4.1.8 Other requirements.5.Materials and Manufacturing Requirements forProduct Castings5.1 Final thermal processing for castings,if any,shal
