1、Designation:B19917Standard Specification forMagnesium-Alloy Permanent Mold Castings1This standard is issued under the fixed designation B199;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 parent
2、heses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1This specification covers magnesium alloy permanentmold casting alloys
3、 designated as shown in Table 1.1.2 The values stated in inch-pound units are to be regardedas the standard.The SI values given in parentheses areprovided for information only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibili
4、ty of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
5、 Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this sp
6、ecification to theextent referenced herein:2.2 ASTM Standards:2B93/B93M Specification for Magnesium Alloys in IngotForm for Sand Castings,Permanent Mold Castings,andDie CastingsB296 Practice for Temper Designations of MagnesiumAlloys,Cast and WroughtB557 Test Methods for Tension Testing Wrought and
7、CastAluminum-and Magnesium-Alloy ProductsB660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB661 Practice for Heat Treatment of Magnesium AlloysB951 Practice for Codification of Unalloyed Magnesium andMagnesium-Alloys,Cast and WroughtB953 Practice for Sampling Magnesium and Magnes
8、iumAlloys for Spectrochemical AnalysisB954 Test Method for Analysis of Magnesium and Magne-sium Alloys by Atomic Emission SpectrometryE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form f
9、or Determination of Chemical CompositionE94 Guide for Radiographic ExaminationE155 Reference Radiographs for Inspection of Aluminumand Magnesium CastingsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)
10、2.3 Federal Standards:Fed.Std.No.123 Marking for Shipment(Civil Agencies)32.4 Aerospace Materials Specification:4AMS 2768 Heat Treatment of Magnesium Alloy Castings3.Terminology3.1 Definitions:3.1.1 permanent mold casting,na metal object producedby introducing molten metal by gravity or low pressure
11、 into amold constructed of durable material,usually iron or steel,andallowing it to solidify.3.1.2 semipermanent mold casting,na permanent moldcasting which is made using an expendable core such asbonded sand.4.Ordering Information4.1 Orders for castings under this specification shall includethe fol
12、lowing information:1This specification is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.04 onMagnesium Alloy Cast and Wrought Products.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1945.Last
13、previous edition approved in 2012 as B199 12.DOI:10.1520/B0199-17.2For 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.
14、3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096-0001,http:/www.sae.org.*A Summary of Changes section appears at the end of th
15、is standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of
16、 International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.1.1 Quantity of each casting,4.1.2 Alloy(Section 7 and Table 1),4.1.3 Temper(Section 8 and Table 2),4.1.4 Minimum properties of specimens cut from castings,if required(see 9.3),4.1.5 Drawing showing dimensions of the castings(theamount of stock left for machine finish should be indicated),4.1.6 Surface treatment(see 10.1),4.1.7 Whether inspection is required at
