1、Designation: B 951 07Standard Practice forCodification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought1This standard is issued under the fixed designation B 951; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice provides a system for designating unal-loyed magnesium and magnesium-alloys that have been usedcom
3、mercially 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 appendixes are in
4、 accordance withPractice E 527.2. 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 CastingsB 90/B 90M Specification for Magnesium-Alloy Sheet andPlateB91 Specification for Magnes
5、ium-Alloy ForgingsB 92/B 92M Specification for Unalloyed Magnesium Ingotand Stick For RemeltingB 93/B 93M Specification for Magnesium Alloys in IngotForm for Sand Castings, Permanent Mold Castings, andDie CastingsB94 Specification for Magnesium-Alloy Die CastingsB 107/B 107M Specification for Magnes
6、ium-Alloy Ex-truded Bars, Rods, Profiles, Tubes, and WireB 199 Specification for Magnesium-Alloy Permanent MoldCastingsB 403 Specification for Magnesium-Alloy Investment Cast-ingsB 843 Specification for Magnesium Alloy Anodes for Ca-thodic ProtectionE 527 Practice for Numbering Metals and Alloys (UN
7、S)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 are ex-pressed to the following places:Less than 0.0001
8、% (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 magnesiumnot made by a refining process0.0X0.10 through 0.55 % 0.XXOver 0.55 % 0.X,X.X,XX.X3.2 Designations shall b
9、e 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 designations. Arbitraryassignments by other subcommittees o
10、r 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 decreasing percent-ages, or in alphabetical order if of equal percentages, followedby the
11、 respective percentages rounded off to whole numbersand a serial letter (Notes 3 and 4). 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 alloying element is defined as an element(other t
12、han the base metal) having a minimum content greater than zeroeither directly specified or computed in accordance with the percentagesspecified.1This practice is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.04 onMagnesium
13、 Alloy Cast and Wrought Products.Current edition approved April 15, 2007. Published May 2007.2For 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
14、Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 3The serial letter is arbitrarily assigned in alphabetical se-quence starting with “A” (omitting “I” and “O”) and serves to differentiateotherwise i
15、dentical designations. A serial letter is necessary to completeeach designation.NOTE 4The designation of a casting alloy in ingot form is derivedfrom the composition specified for the corresponding alloy in the form ofcastings. Thus, a casting ingot designation may consist of an alloydesignation hav
16、ing one or more serial letters, one for each productcomposition, or it may consist of one or more alloy designations.4.2 The letters used to represent the greater of the twoalloying elements shall be those in Table 1.4.3 In rounding percentages, the nearest whole number shallbe used. If two choices
17、are possible as when the decimal isfollowed by a 5 only, or a 5 followed only by zeros, the nearesteven 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
18、element, the rounded minimum percentage shall beused in the designation.5. Unalloyed Metals5.1 Designations 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
19、the designation, but it isomitted for brevity when the base metal being referred to isobvious.6. Keywords6.1 magnesium; UNS designationsTABLE 1 Letters Representing Alloying ElementsAAluminum QSilverCCopper SSiliconERare earths TTinJStrontium VGadoliniumKZirconium WYttriumLLithium ZZincMManganeseB95
20、1072TABLE2UnalloyedMagnesiumandMagnesium-AlloyRegistration(ARegistrationRecordofMagnesiumAlloyswithEstablishedDesignationsandChemicalComposition)NOTECastorwroughtproductcompositionsmaydifferfromcastingingotcompositions.DesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMM
21、agnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeodymiumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotal9980AM19980B9299.80min0.020.100.0010.01Sn0.01Pb0.006Na0.059980BM19991B9299.80min0.020.100.0050.01Sn0.01Pb0.059990AM19990B9299.90min0.0030.040.00
22、40.0010.0050.00007BA0.0001CdA0.019995AM19995B9299.95min0.010.0030.0040.0010.0050.01Ti0.00003BA0.0001CdA0.0059998AM19998B9299.98min0.0040.00050.0020.0020.00050.0030.001Ti0.00005Cd0.00003B0.001Pb0.005AJ52ABM17520B94C4.5-5.50.0100.004D0.24-0.6D0.0010.101.7-2.30.220.01AJ62ABM177620B94C5.5-6.60.0100.04D0
23、.24-0.6D0.0010.102.0-2.80.220.01AM50AM10500B94C4.4-5.40.0100.004D0.26-0.6D0.0020.100.220.02AM60AM10600B94C5.5-6.50.350.13-0.60.030.500.220.0AM60BM10602C5.5-6.50.0100.005D0.24-0.6D0.0020.100.220.02AM100AM10100B80B199B403C9.3-10.70.100.10-0.350.010.300.300.0AM100AM10101B93C9.4-10.60.080.13-0.350.010.2
24、00.200.0AS21AM10210B94C1.8-2.50.010.0050.18-0.70.0010.7-1.20.200.01AS21BBM10212B94C1.8-2.50.0080.00350.05-0.150.0010.06-0.250.7-1.20.250.01AS41AM10410B94C3.5-5.00.060.20-0.500.030.50-1.50.12AS41BM10412B94C3.5-0.7D0.020.0035D0.35-0.70.0020.50-1.50.120.02AZ31BM11311B90B91B107B843C2.5-3.50.040.050.0050
25、.20-1.00.0050.100.6-1.40.0AZ31CM11312B107C2.4-3.60.100.15-1.0E0.030.100.50-1.50.0AZ31DM11313B843C2.5-3.50.040.040.0020.20-1.00.00100.050.6-1.40.010.0AZ61AM11610B91B107C5.8-7.20.050.0050.15-0.50.0050.100.40-1.50.0AZ63AM11630B80C5.3-6.70.250.15-0.350.010.302.5-3.50.0AZ63AM11631B93C5.5-6.50.200.15-0.35
26、0.0100.202.7-3.30.0AZ63BM11632B843C5.3-6.70.020.0030.15-0.70.0020.102.5-3.50.0AZ63CM11634B843C5.3-6.70.050.0030.15-0.70.0030.302.5-3.50.0AZ63DM11636B843C5.0-7.00.100.0030.15-0.70.0030.302.0-4.00.0AZ80AM11800B91B107C7.8-9.20.050.0050.12-0.50.0050.100.20-0.80.0AZ81AM11810B80B199B403C7.0-8.10.100.13-0.
27、350.010.300.40-1.00.0AZ81AM11811B93C7.2-8.00.080.15-0.350.0100.200.5-0.90.0AZ91BM11912B94C8.3-9.70.350.13-0.500.030.500.35-1.00.020.0B951073TABLE2ContinuedDesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeody
28、miumNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotalAZ91CM11914B80B199B403C8.1-9.30.100.13-0.350.010.300.40-1.00.0AZ91CM11915B93C8.3-9.20.080.15-0.350.0100.200.45-0.90.0AZ91DM11916B94C8.3-9.70.0300.005D0.15-0.50D0.0020.100.35-1.00.02AZ91EM11919B80B199B403C8.1-
29、9.30.0150.005F0.17-0.350.00100.200.40-1.00.010.0AZ91EM11918B93C8.3-9.20.0150.0050.17-0.500.00100.200.45-0.90.010.0AZ92AM11920B80B199B403C8.3-9.70.250.10-0.350.010.301.6-2.40.0AZ92AM11921B93C8.5-9.50.200.13-0.350.0100.201.7-2.30.0EQ21AM18330B80B199B403C0.05-0.100.011.5-3.0G1.3-1.70.40-1.00.0EQ21AM183
30、30B93C0.05-0.100.011.5-3.0G0.011.3-1.70.30-1.00.0EV31AHM12310B80C0.011.0-1.70.0102.6-3.10.00200.4I0.050.20-0.500.40-1.00.01EV31AHM12311B93C0.011.0-1.70.0102.6-3.10.00200.4I0.050.20-0.500.3-1.00.01EZ33AM12330B80B199B403C0.100.012.5-4.0J2.0-3.10.50-1.00.0EZ33AM12331B93C0.030.0102.6-3.9J0.012.0-3.00.3-
31、1.00.0EZ33AM12330B93C0.100.012.5-4.0J2.0-3.10.50-1.00.0K1AM18010B80B403C0.40-1.0K0.0K1AM18011B93C0.030.0100.010.30-1.0K0.0M1AM15100B107C0.300.051.2-2.00.010.100.0M1CM15102B843C0.010.020.030.50-1.30.0010.050.0QE22AM18220B80B199B403C0.100.011.8-2.5G2.0-3.00.40-1.00.0QE22AM18221B93C0.030.150.0101.9-2.4
32、G0.012.0-3.00.20.30-1.00.0WE54AM18410B80B107C0.030.20.031.5-2.00.0051.5-4.0L0.014.75-5.50.200.40-1.00.20WE54AM18410B93C0.030.20.151.5-2.00.0051.5-4.0L0.014.75-5.50.200.3-1.00.0WE43AM18430B80C0.030.010.20.152.0-2.50.0052.4-4.4L0.013.7-4.30.200.40-1.00.20WE43AM18431B93C0.030.180.152.0-2.50.0052.4-4.4L
33、0.013.7-4.30.200.30-1.00.30WE43BM18432B80B107C0.020.0100.20.032.0-2.50.0052.4-4.4LM3.7-4.30.20M0.40-1.00.01WE43BM18433B93C0.010.180.032.0-2.50.0042.4-4.4LM3.7-4.30.30-1.00.01ZC63AM16331B80C2.4-3.00.25-0.750.010.205.5-6.50.0ZC63AM16331B80C2.4-3.00.25-0.750.0010.205.5-6.50.0ZE41AM16410B80B403C0.100.15
34、0.010.75-1.75J3.5-5.00.40-1.00.0ZE41AM16411B93C0.030.150.011.0-1.75J0.013.7-4.80.30-1.00.0ZK40AM16400B107C0.100.013.5-4.50.45min0.0B951074TABLE2ContinuedDesignationChemicalComposition,%maxunlessshownasarangeorasaminPracticeUNSSeeASTMMagnesiumAluminumCalciumCopperGadoliniumIronLithiumManganeseNeodymi
35、umNickelRareEarthsSiliconSilverStrontiumYttriumZincZirconiumOtherElementsSpecificEachTotalZK51AM16510B80C0.100.013.6-5.50.50-1.00.0ZK51AM16511B93C0.030.0100.013.8-5.30.3-1.00.0ZK60AM16600B91B107C4.8-6.20.45min0.0ZK61AM16610B80B403C0.100.015.5-6.50.6-1.00.0ZK61AM16611B93C0.030.0100.015.7-6.30.3-1.00.
36、0AFornuclearapplications.BAlloysAJ52A,AJ62A,andAS21Barepatentedcompositionsforelevatedtemperatureapplications.InterestedpartiesareinvitedtosubmitinformationregardingtheidentificationofalternativestothesecompositionstoASTMInternational.yourcommentswillreceivecarefulconsiderationatameetingoftherespons
37、ibletechnicalcommittee,whichyoumayattend.ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisspecification.Usersofthisspecificationareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrigh
38、ts,areentirelytheirownresponsibility.CRemainder.DForalloysAS41B,AM50A,AJ52A,AM60B,AJ62A,andAZ91D,ifeithertheminimumManganeseormaximumIroncontentisnotmet,thenthepermissibleIrontoManganeseratioshallnotexceed0.010,0.015,0.021,and0.032,respectively.EManganeseminimumlimitneednotbemetifIronis0.005%orless.
39、FIftheironcontentexceeds0.005%,theIrontoManganeseratioshallnotexceed0.032forAZ91Ealloy.GRareearthelementsareintheformofDidymium,withnotlessthan70%NeodymiumandremaindersubstantiallyPraesodymium.HAlloyEV31Aisapatentedcomposition,suitableforelevatedtemperatureapplications.Interestedpartiesareinvitedtos
40、ubmitinformationregardingtheidentificationofalternativestothesecompositionstoASTMInternational.Commentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemme
41、ntionedinthisspecification.Usersofthisspecificationareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.IOtherRareEarthsmayalsobepresenttoatotalmaximumof0.4%.TheseRareEarthsshallprincipallybeCerium,Lanthanum,and
42、Praseodymium.JTotalRareEarths(TRE)areprincipallyamixtureofCerium,Lanthanum,NeodymiumandPraseodymium.TheCeriumcontentshouldnotbelessthan45%oftheTRE.KZirconiumrangeforsheetandplateshallbe0.451.0.LOtherRareEarthsshallbeprincipallyheavyrareearths,suchasGadolinium,Dysprosium,Erbium,andYtterbium.OtherRare
43、EarthsarederivedfromtheYttrium,typically80%Yttriumand20%heavyrareearths.MZinc+Silvercontentshallnotexceed0.20%inWE43B.B951075APPENDIX(Nonmandatory Information)X1. EXAMPLES OF CODIFICATIONX1.1 Example 1For Alloys AZ91A, B, and C, in Speci-fication B 93/B 93M, “A” represents aluminum, the alloyingelem
44、ent specified in the greatest amount; “Z” represents zinc,the alloying element specified in the second greatest amount;“9” indicates that the rounded mean aluminum percentage liesbetween 8.6 and 9.4; “1” signifies that the rounded mean of thezinc lies between 0.6 and 1.4; and “A” as the final letter
45、indicates that this is the first alloy whose composition qualifiedassignment of the designation AZ91. The final serial letters Band C signify alloys subsequently developed whose specifiedcompositions differ slightly from the first and from one anotherbut do not differ sufficiently to effect a change
46、 in the basicdesignation.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infring
47、ement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard
48、or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views
49、known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).B951076
