ASTM_B_93_-_B_93M_-_15.pdf

Designation:B93/B93M15Standard Specification forMagnesium Alloys in Ingot Form for Sand Castings,Permanent Mold Castings,and Die Castings1This standard is issued under the fixed designation B93/B93M;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers magnesium alloys in ingotform for remelting for the manufacture of sand castings,permanent mold castings,investment castings,and die cast-ings.NOTE1Supplementary information pertaining to the alloys coveredby this specification when used in the form of castings is given inSpecifications B80,B94,B199 and B403.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.The values stated ineach system are not exact equivalents;therefore,each systemshall be used independently of the other.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility 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.2.Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B80 Specification for Magnesium-Alloy Sand CastingsB94 Specification for Magnesium-Alloy Die CastingsB199 Specification for Magnesium-Alloy Permanent MoldCastingsB403 Specification for Magnesium-Alloy Investment Cast-ingsB660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB666 Practice for Identification Marking of Aluminum andMagnesium ProductsB951 Practice for Codification of Unalloyed Magnesium andMagnesium-Alloys,Cast and WroughtB953 Practice for Sampling Magnesium and MagnesiumAlloys 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Data toDetermine Conformance with SpecificationsE35 Test Methods for Chemical Analysis of Magnesium andMagnesium Alloys(Withdrawn 2008)3E527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)3.Ordering Information3.1 Orders for ingot to this specification shall include thefollowing information:3.1.1 Quantity in pounds(kilograms)3.1.2 Alloy(Section 4 and Table 1 or Table 2),and3.1.3 Form:as agreed upon between the purchaser andseller.3.1.4 Inspection required at the manufacturers works(see8.1).3.1.5 For inch-pound orders specify B93;for metric ordersspecify B93M.Do not mix units.4.Chemical Composition4.1 The ingots shall conform to the chemical compositionlimits prescribed in Table 1 for sand cast alloys and permanentmold-cast alloys and in Table 2 for die-cast alloys.Confor-mance shall be determined by the manufacturer by analyzingsamples taken at the time the ingots are poured or samplestaken from the ingots.If the manufacturer has determined thechemical composition of the material during manufacture,heshall not be required to sample and analyze the ingots.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 1,2015.Published May 2015.Originallyapproved in 1934.Last previous edition approved in 2009 as B93/B93M 09.DOI:10.1520/B0093_B0093M-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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Chemical Requirements for Alloy Ingot for Remelt to Sand,Permanent Mold and Investment CastingsComposition%AlloyAASTMUNSMag-nesiumAlumi-numCopper,maxGadol-iniumIron,maxLithium,maxManga-neseNeody-miumNickel,maxRareEarthsSilicon,maxSilverYttriumZincZir-coniumOtherseach,maxBTotalOthers,maxBAM100AM10101remainder9.410.60.08.0.130.35.0.010.0.20.0.2 max.0.30AZ63AM11631remainder5.56.50.20.0.150.35.0.010.0.20.2.73.3.0.30AZ81AM11811remainder7.28.00.08.0.150.35.0.010.0.20.0.50.9.0.30AZ91CM11915remainder8.39.20.08.0.150.35.0.010.0.20.0.450.9.0.30AZ91EM11918remainder8.39.20.015.0.005.0.170.50.0.0010.0.20.0.450.9.0.010.30AZ92AM11921remainder8.59.50.20.0.130.35.0.010.0.20.1.72.3.0.30EQ21AM18330remainder.0.050.10.0.011.53.0C0.011.31.7.0.31.0.0.30EV31ADM12311remainder.0.011.01.70.010.2.63.10.00200.4E.0.05 max.0.2