1、Designation: B951 11 (Reapproved 2018)Standard Practice forCodification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought1This standard is issued under the fixed designation B951; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r
2、evision, 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. Scope*1.1 This practice provides a system for designating unal-loyed magnesium and magnesium-alloys that h
3、ave been usedcommercially since 1952, and thus is intended to be theregistration source for unalloyed magnesium and magnesium-alloys. A record of designations along with the establishedcompositions is given in Table 2.1.2 The equivalent Unified Numbering System (UNS) alloydesignations shown in the a
4、ppendixes are in accordance withPractice E527.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the
5、 World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents form a part of this practice tothe extent referenced herein:2.2 ASTM Standards:2B80 Specification for Magnesium-Alloy Sand CastingsB90/B90M Specification for Magnesium-Alloy Sheet
6、andPlateB91 Specification for Magnesium-Alloy ForgingsB92/B92M Specification for Unalloyed Magnesium Ingotand Stick For RemeltingB93/B93M Specification for Magnesium Alloys in IngotForm for Sand Castings, Permanent Mold Castings, andDie CastingsB94 Specification for Magnesium-Alloy Die CastingsB107/
7、B107M Specification for Magnesium-Alloy ExtrudedBars, Rods, Profiles, Tubes, and WireB199 Specification for Magnesium-Alloy Permanent MoldCastingsB403 Specification for Magnesium-Alloy Investment Cast-ingsB843 Specification for Magnesium Alloy Anodes for Ca-thodic ProtectionE527 Practice for Numberi
8、ng Metals and Alloys in theUnified Numbering System (UNS)3. Basis of Codification3.1 The designations for alloys and unalloyed metals arebased on their chemical composition limits.NOTE 1For unalloyed magnesium, magnesium-alloys, cast andwrought, standard limits for alloying elements and impurities a
9、re ex-pressed to the following places:Less than 0.0001 % (used only for magnesium alloys) 0.0000X0.0001 to 0.001 % 0.000X0.001 to 0.01 % 0.00X0.01 to 0.10 %Unalloyed aluminum made by a refining process 0.0XXAlloys and unalloyed aluminum or magnesium notmade by a refining process0.0X0.10 through 0.55
10、 % 0.XXOver 0.55 % 0.X, X.X, XX.X3.2 Designations shall be assigned, revised, and cancelledby Subcommittee B07.04 of ASTM Committee B07 on LightMetals and Alloys on written requests to its chairman. Com-plete chemical composition limits shall be submitted withrequest for assignment or revision of de
11、signations. Arbitraryassignments by other subcommittees or committees will not berecognized.4. Alloys4.1 Designation for alloys shall consist of not more than twoletters representing the alloying elements (Note 2) specified inthe greatest amount, arranged in order of decreasingpercentages, or in alp
12、habetical order if of equal percentages,followed by the respective percentages rounded off to wholenumbers and a serial letter (Note 3). The full name of the basemetal precedes the designation, but it is omitted for brevitywhen the base metal being referred to is obvious.NOTE 2For codification, an a
13、lloying element is defined as an element(other than the base metal) having a minimum content greater than zero1This practice 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.C
14、urrent edition approved May 1, 2018. Published May 2018. Originallyapproved in 2007. Last previous edition approved in 2011 as B951 11. DOI:10.1520/B0951-11R18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
15、 ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.*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 StatesThis international stan
16、dard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1eithe
17、r directly specified or computed in accordance with the percentagesspecified.NOTE 3The serial letter is arbitrarily assigned in alphabetical se-quence starting with “A” (omitting “I” and “O”) and serves to differentiateotherwise identical designations. A serial letter is necessary to completeeach de
18、signation.4.2 The letters used to represent the two greatest amounts ofthe alloying elements shall be those in Table 1.4.3 In rounding percentages, the nearest whole number shallbe used. If two choices are possible as when the decimal isfollowed by a 5 only, or a 5 followed only by zeros, the neares
19、teven whole number shall be used.4.4 When a range is specified for the alloying element, therounded mean shall be used in the designation.4.5 When only a minimum percentage is specified for thealloying element, the rounded minimum percentage shall beused in the designation.5. Unalloyed Metals5.1 Des
20、ignations for unalloyed metals consist of the speci-fied minimum purity, all digits retained but dropping thedecimal point, followed by a serial letter (Note 3). The fullname of the base metal precedes the designation, but it isomitted for brevity when the base metal being referred to isobvious.6. K
21、eywords6.1 magnesium; UNS designationsTABLE 1 Letters Representing Alloying ElementsAAluminum QSilverCCopper SSiliconERare earths TTin*HThorium* VGadoliniumJStrontium WYttriumKZirconium ZZincLLithium* *For historical referenceMManganeseB951 11 (2018)2TABLE2UnalloyedMagnesiumandMagnesium-AlloyRegistr
22、ation(ARegistrationRecordofMagnesiumAlloyswithEstablishedDesignationsandChemicalComposition)NOTE1Castorwroughtproductcompositionsmaydifferfromcastingingotcompositions.DesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumMa
23、nganeseNeodymiumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotal9980AM19980B92/ B92M99.80min0.020.100.0010.01Sn0.01Pb0.006Na0.059980BM19991B92/ B92M99.80min0.020.100.0050.01Sn0.01Pb0.059990AAM19990B92/ B92M99.90min0.0030.040.0040.0010.0050.019995AAM19995B92/ B
24、92M99.95min0.010.0030.0040.0010.0050.01Ti0.0059998AAM19998B92/ B92M99.98min0.0040.00050.0020.0020.00050.0030.001Ti0.001Pb0.005AJ52ABM17520B94C4.5-5.50.0100.004D0.24-0.6D0.0010.101.7-2.30.220.01AJ52ABEM17521B93/ B93MC4.6-5.50.0080.0040.26-0.50.0010.081.8-2.30.200.01AJ62ABM17620B94C5.5-6.60.0100.004D0
25、.24-0.6D0.0010.102.0-2.80.220.01AJ62ABEM17621B93/ B93MC5.6-6.60.0080.0040.26-0.050.0010.082.1-2.80.200.01AM50AM10500B94C4.4-5.40.0100.004D0.26-0.6D0.0020.100.220.02AM50AEM10501B93/ B93MC4.5-5.30.0080.0040.28-0.500.0010.080.200.01AM60AM10600B94C5.5-6.50.350.13-0.60.030.500.22AM60AM10601B93/ B93MC5.6-
26、6.40.250.15-0.500.010.200.200.30AM60BM10602B94C5.5-6.50.0100.005D0.24-0.6D0.0020.100.220.02AM60BEM10603B93/ B93MC5.6-6.40.0080.0040.26-0.500.0010.080.200.01AM100AM10100B80 B199 B403C9.3-10.70.100.10-0.350.010.300.300.30AM100AM10101B93/ B93MC9.4-10.60.080.13-0.350.0100.200.20.30AS21AM10210B94C1.8-2.5
27、0.010.0050.18-0.70.0010.7-1.20.200.01AS21AEM10211B93/ B93MC1.9-2.50.0080.0040.2-0.60.0010.7-1.20.200.01AS21BBM10212B94C1.8-2.50.0080.00350.05-0.150.0010.06-0.250.7-1.20.250.01AS21BBEM10213B93/ B93MC1.9-2.50.0080.00350.05-0.150.0010.06-0.250.7-1.20.250.01AS41AM10410B94C3.5-5.00.060.20-0.500.030.50-1.
28、50.12AS41AM10411B93/ B93MC3.7-4.80.040.22-0.480.010.60-1.40.100.30AS41BM10412B94C3.5-0.7D0.020.0035D0.35-0.70.0020.50-1.50.120.02AS41BEM10413B93/ B93MC3.7-4.80.0150.00350.35-0.60.0010.60-1.40.100.01AZ31BM11311B90/ B90M B91 B107/ B107M B843C2.5-3.50.040.050.0050.20-1.00.0050.100.6-1.40.30B951 11 (201
29、8)3TABLE2ContinuedDesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeodymiumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotalAZ31CM11312B107/ B107MC2.4-3.60.100.15-1.0F0.
30、030.100.50-1.50.30AZ31DM11313B843C2.5-3.50.040.040.0020.20-1.00.00100.050.6-1.40.010.30AZ61AM11610B91 B107/ B107MC5.8-7.20.050.0050.15-0.50.0050.100.40-1.50.30AZ63AM11630B80C5.3-6.70.250.15-0.350.010.302.5-3.50.30AZ63AM11631B93/ B93MC5.5-6.50.200.15-0.350.0100.202.7-3.30.30AZ63BM11632B843C5.3-6.70.0
31、20.0030.15-0.70.0020.102.5-3.50.30AZ63CM11634B843C5.3-6.70.050.0030.15-0.70.0030.302.5-3.50.30AZ63DM11636B843C5.0-7.00.100.0030.15-0.70.0030.302.0-4.00.30AZ80AM11800B91 B107/ B107MC7.8-9.20.050.0050.12-0.50.0050.100.20-0.80.30AZ81AM11810B80 B199 B403C7.0-8.10.100.13-0.350.010.300.40-1.00.30AZ81AM118
32、11B93/ B93MC7.2-8.00.080.15-0.350.0100.200.5-0.90.30AZ91AM11910B94C8.3-9.70.100.13-0.500.030.500.35-1.0AZ91AM11911B93/ B93MC8.5-9.50.080.15-0.400.010.200.45-0.90.30AZ91BM11912B94C8.3-9.70.350.13-0.500.030.500.35-1.0AZ91BM11913B93/ B93MC8.5-9.50.250.15-0.400.010.200.45-0.90.30AZ91CM11914B80 B199 B403
33、C8.1-9.30.100.13-0.350.010.300.40-1.00.30AZ91CM11915B93/ B93MC8.3-9.20.080.15-0.350.0100.200.45-0.90.30AZ91DM11916B94C8.3-9.70.0300.005D0.15- 0.50D0.0020.100.35-1.00.02AZ91DEM11917B93/ B93MC8.5-9.50.0250.0040.17-0.400.0010.080.45-0.90.01AZ91EM11919B80 B199 B403C8.1-9.30.0150.005G0.17-0.350.00100.200
34、.40-1.00.010.30AZ91EM11918B93/ B93MC8.3-9.20.0150.0050.17-0.500.00100.200.45-0.90.010.30AZ92AM11920B80 B199C8.3-9.70.250.10-0.350.010.301.6-2.40.30AZ92AM11920B403C8.3-9.70.100-0.350.010.301.6-2.40.30AZ92AM11921B93/ B93MC8.5-9.50.200.13-0.350.0100.201.7-2.30.30AZ101AHM11101C9.5-10.50.050.0050.130.005
35、0.050.75-1.250.30EQ21AM18330B80 B199 B403C0.05-0.100.011.5-3.0I1.3-1.70.40-1.00.30EQ21AM18330B93/ B93MC0.05-0.100.011.5-3.0I0.011.3-1.70.30-1.00.30EV31AJM12310B80C0.011.0-1.70.0102.6-3.10.00200.4K0.050.20-0.500.40-1.00.01B951 11 (2018)4TABLE2ContinuedDesignationChemicalComposition,%maxunlessshownasa
36、rangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeodymiumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotalEV31AJM12311B93/ B93MC0.011.0-1.70.0102.6-3.10.00200.4K0.050.20-0.500.3-1.00.01EZ33AM12330B80 B199 B403C0.100.01
37、2.5-4.0L2.0-3.10.50-1.00.30EZ33AM12331B93/ B93MC0.030.0102.6-3.9L0.012.0-3.00.3-1.00.30K1AM18010B80 B403C0.40-1.00.30K1AM18011B93/ B93MC0.030.0100.010.30-1.00.30M1AM15100B107/ B107MC0.300.051.2-2.00.010.100.30M1CM15102B843C0.010.020.030.50-1.30.0010.050.050.30QE22AM18220B80 B199 B403C0.100.011.8-2.5
38、I2.0-3.00.40-1.00.30QE22AM18221B93/ B93MC0.030.150.0101.9-2.4I0.012.0-3.00.20.30-1.00.30WE54AM18410B80C0.030.20.031.5-2.00.0052.0M0.014.75-5.50.200.40-1.00.20WE54AM18410B93/ B93MC0.03.200.151.5-2.00.0052.0M0.014.75-5.50.200.3-1.00.30WE54AM18410B107/ B107MC0.030.20.031.5-2.00.0052.0M0.014.75-5.50.200
39、.40-1.00.2WE43AM18430B80C0.030.010.20.152.0-2.50.0051.9M0.013.7-4.30.200.40-1.00.2WE43AM18431B93/ B93MC0.030.180.152.0-2.50.0051.9M0.013.7-4.30.200.3-1.00.30WE43BM18432B80C0.020.0100.20.032.0-2.50.0051.9MN3.7-4.3N0.40-1.00.01WE43BM18432B107/ B107MC0.020.0100.20.032.0-2.50.0051.9MN3.7-4.3N0.40-1.00.0
40、1WE43BM18433B93/ B93MC0.010.180.032.0-2.50.0041.9MO3.7-4.3O0.3-1.00.01WE43CM18434B90/ B90M B107/ B107MC0.02P0.0050.050.032.0-2.50.00200.30-1.0P3.7-4.30.060.2-1.00.01ZC63AM16331B80C2.4-3.00.25-0.750.010.205.5-6.50.30ZC63AM16331B93/ B93MC2.4-3.000.25-0.750.0010.205.5-6.50.30ZE41AM16410B80 B403C0.100.1
41、50.010.75- 1.75L3.5-5.00.40-1.00.30ZE41AM16411B93/ B93MC0.030.150.011.0-1.75L0.013.7-4.80.30-1.00.30ZK40AM16400B107/ B107MC3.5-4.50.45min0.30ZK51AM16510B80C0.100.013.6-5.50.50-1.00.30ZK51AM16511B93/ B93MC0.030.0100.013.8-5.30.3-1.00.30ZK60AM16600B91 B107/ B107MC4.8-6.20.45min0.30B951 11 (2018)5TABLE
42、2ContinuedDesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeodymiumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotalZK61AM16610B80 B403C0.100.015.5-6.50.6-1.00.30ZK61AM1
43、6611B93/ B93MC0.030.0100.015.7-6.30.3-1.00.30AFornuclearapplicationsthecadmiumandboron(high-capturecross-sectionelements)shallbespecifiedasfollows:Cadmium,max,%0.0001or0.00005Boron,max,%0.00007or0.00003BAlloysAJ52A,AJ62A,andAS21Barepatentedcompositionsforelevatedtemperatureapplications.Interestedpar
44、tiesareinvitedtosubmitinformationregardingtheidentificationofalternativestothesecompositionstoASTMInternational.yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinco
45、nnectionwithanyitemmentionedinthisspecification.Usersofthisspecificationareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.CRemainder.DForalloysAS41B,AM50A,AJ52A,AM60B,AJ62A,andAZ91D,ifeithertheminimumManganes
46、eormaximumIroncontentisnotmet,thenthepermissibleIrontoManganeseratioshallnotexceed0.010,0.015,0.021,and0.032,respectively.EBeryllium0.00050.0015.FManganeseminimumlimitneednotbemetifIronis0.005%orless.GIftheironcontentexceeds0.005%,theIrontoManganeseratioshallnotexceed0.032forAZ91Ealloy.HRodforweldin
47、gAZ91andAZ92alloys.IRareearthelementsareintheformofDidymium,withnotlessthan70%NeodymiumandremaindersubstantiallyPraesodymium.JAlloysEV31AandWE43Carepatentedcompositions,bothsuitableforelevatedtemperatureapplications.Interestedpartiesareinvitedtosubmitinformationregardingtheidentificationofalternativ
48、estothesecompositionstoASTMInternational.Commentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisspecification.Usersofthisspecificationare
49、expresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.KOtherRareEarthsmayalsobepresenttoatotalmaximumof0.4%.TheseRareEarthsshallprincipallybeCerium,Lanthanum,andPraseodymium.LTotalRareEarths(TRE)areprincipallyamixtureofCerium,Lanthanum,NeodymiumandPraseodymium.TheCeriumcontentshouldnotbelessthan45%oftheTRE.MOtherRareEarthsshallbeprincipallyheavyrareearths,suchasGadolinium,Dysprosium,Erbium,andYtterbium.OtherRareEarthsarederivedfromtheYttrium,typically80%Yttriumand20%heavy
