1、Designation: B94 13Standard Specification forMagnesium-Alloy Die Castings1This standard is issued under the fixed designation B94; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in parentheses i
2、ndicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers magnesium-alloy die castings.Current alloy composi
3、tions are specified under the designationsshown in Table 1.21.2 The values stated in inch-pound units are standard. TheSI values in parentheses are provided for information only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespons
4、ibility 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
5、 theextent referenced herein:2.2 ASTM Standards:3B93/B93M Specification for Magnesium Alloys in IngotForm for Sand Castings, Permanent Mold Castings, andDie CastingsB557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB660 Practices for Packaging/Packing of Alu
6、minum 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 SpectrometryE
7、23 Test Methods for Notched Bar Impact Testing of Me-tallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE505 Reference Radiograph
8、s for Inspection of Aluminumand Magnesium Die CastingsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.3 American Die Casting Institute:3“E” Series Product Standards2.4 Federal Standards:4FED-STD-123 Marking for Shipment (Civil Agencies)SAE AMS-STD-184 Identificati
9、on Marking of Aluminum,Magnesium and Titanium2.5 Military Standard:4MIL-STD-129 Marking for Shipment and Storage3. Terminology3.1 Definitions:3.1.1 die castinga metal object produced by the introduc-tion of molten metal under substantial pressure into a metal dieand characterized by a high degree of
10、 fidelity to the die cavity.4. Ordering Information4.1 Orders for die castings shall include the following basicinformation:4.1.1 This specification number and date,4.1.2 Quantity and delivery schedule, as required,4.1.3 Part name and number,4.1.4 Alloy (Table 1), and4.1.5 Drawing of die casting, wh
11、en required, giving allnecessary dimensions and showing latest revisions and allow-ances for machining, if any. Location of ejector pin marks orparting lines shall be at the option of the producer, unlessspecifically designated on the drawing.1This specification is under the jurisdiction of ASTM Com
12、mittee 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, 2013. Published June 2013. Originallyapproved in 1934. Last previous edition approved in 2007 as B94 07. DOI:10.1520/B0094-13.2SAE
13、specifications No. 501 and 501A conform to the requirements for AlloyAZ91A and AZ91B respectively.3For 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 Docu
14、ment Summary page onthe ASTM website.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbo
15、r Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 Additional tests, options, and special inspection require-ments as provided below should be justified only on the basisof need. These shall be specified in the contract or purchaseorder, as additional procedures and extended d
16、elivery time maybe involved.4.2.1 Chemical analysis (7.1.1),4.2.2 Quality assurance (Section 6),4.2.3 Special proof tests or mechanical properties (Section8),4.2.4 General quality options for internal soundness or forfinish (Section 10),4.2.5 Source inspection (Section 11),4.2.6 Certification (Secti
17、on 12),4.2.7 Marking for identification (Section 14), and4.2.8 Special packaging (Section 15).5. Materials5.1 The magnesium alloys used for the manufacture of diecastings shall be such that the die castings produced willconform to the chemical composition requirements of thisspecification. Ingot in
18、accordance with Specification B93/B93M may be used but is not restricted to this source.6. Quality Assurance6.1 Responsibility for InspectionWhen specified in thecontract or purchase order, the producer or supplier is respon-sible for the performance of all inspection and test require-ments specifie
19、d herein. Except as otherwise specified in thecontract or order, the producer or supplier may use his own orany other suitable facilities for the performance of the inspec-tion and test requirements specified herein, unless disapprovedby the purchaser. The purchaser shall have the right to performan
20、y of the inspections and tests set forth in this specification.Quality assurance standards shall be agreed upon between theproducer or supplier and purchaser at the time a contract ororder is placed.6.2 Lot DefinitionAn inspection lot shall be defined asfollows:6.2.1 An inspection lot shall consist
21、of the production fromeach die or compound die on each machine for each 24 hduring the first week of normal operation and the productionfor each 48 h thereafter of normal operation. Any significantchange in the machine, composition, die, or continuity ofoperation shall be considered as the start of
22、a new lot. Diecastings inspected by this method shall be so marked orhandled during the finishing operations as not to lose theiridentity.6.2.2 Each die casting of a randomly selected sample shallbe examined to determine conformance to the requirementswith respect to general quality, dimensions, and
23、 identificationTABLE 1 Chemical RequirementsA,B,C,DAlloy Composition, %DesignationBUNS Aluminum Manganese RareEarthStrontium Zinc Copper,maxIron,maxSilicon Nickel OtherMetallicImpurities,max,eachMagnesiumAS41A M10410 3.5-5.0 0.20-0.50 . . 0.12 0.06 . 0.50-1.50.03 . remainderAS41B M10412 3.5-5.0 0.35
24、-0.7E. . 0.12 0.02 0.0035E0.50-1.50.002 0.02 remainderAM50A M10500 4.4-5.4 0.26-0.6E. . 0.22 0.010 0.004E0.10 0.002 0.02 remainderAM60A M10600 5.5-6.5 0.13-0.6 . . 0.22 0.35 . 0.50 0.03 . remainderAM60B M10602 5.5-6.5 0.24-0.6E. . 0.22 0.010 0.005E0.10 0.002 0.02 remainderAZ91A M11910 8.3-9.7 0.13-0
25、.50 . . 0.35-1.00.10 . 0.50 0.03 . remainderAZ91B M11912 8.3-9.7 0.13-0.50 . . 0.35-1.00.35 . 0.50 0.03 . remainderAZ91D M11916 8.3-9.7 0.15-0.50E. . 0.35-1.00.030 0.005E0.10 0.002 0.02 remainderAJ52AFM17520 4.5-5.5 0.24-0.6E. 1.7-2.3 0.22 0.010 0.004E0.10 0.001 0.01 remainderAJ62AFM17620 5.5-6.6 0.
26、24-0.6E. 2.0-2.8 0.22 0.010 0.004E0.10 0.001 0.01 remainderAS21A M10210 1.8-2.5 0.18-0.7 . . 0.20 0.01 0.005 0.7-1.2 0.001 0.01 remainderAS21BFM10212 1.8-2.5 0.05-0.15 0.06-0.25. 0.25 0.008 0.0035 0.7-1.2 0.001 0.01 remainderAAnalysis shall regularly be made only for the elements specifically mentio
27、ned in this table. If, however, the presence of other elements is suspected or indicated in thecourse of routine analysis, further analysis shall be made to determine that these other elements are not in excess of 0.3 %.BThe following applies to all specified limits in this table: For purposes of ac
28、ceptance and rejection an observed value or a calculated value obtained from analysis shouldbe rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding procedure prescribed in Section3 of Practice E29.CWhere single uni
29、ts are shown, these indicate the maximum amounts permitted.DASTM alloy designations were established in accordance with Practice B951, UNS designations were established in accordance with Practice E527.EIn alloysAS41B,AM50A,AJ52A,AM60B,AJ62A, andAZ91D, if either the minimum manganese limit or the ma
30、ximum iron limit is not met, then the iron/manganese ratioshall not exceed 0.010, 0.015, 0.015, 0.021, 0.021, and 0.032, respectively.FAlloys AJ52A, AJ62A, and AS21B are patented compositions for elevated temperature applications. Interested parties are invited to submit information regarding theide
31、ntification of alternatives to these compositions to ASTM International. Your comments will receive careful consideration at a meeting of the responsible technicalcommittee, which you may attend. ASTM International takes no position respecting the validity of any patent rights asserted in connection
32、 with any item mentioned in thisstandard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirelytheir own responsibility.B94132marking. The producer or supplier may use a system ofstatistica
33、l quality control for such examinations.7. Chemical Composition7.1 LimitsThe die casting shall conform to the require-ments as to chemical composition prescribed in Table 1.Conformance shall be determined by the producer by analyzingsamples taken at the time castings are made. If the producer hasdet
34、ermined the chemical composition of the metal during thecourse of manufacture, he shall not be required to sample andanalyze the finished product.7.1.1 When a detailed chemical analysis is required with ashipment, it shall be called for in the contract or purchase order.7.1.2 If the producers or sup
35、pliers method of compositioncontrol is acceptable, sampling for chemical analysis may bewaived at the discretion of the purchaser.7.2 Number of SamplesWhen required, samples for deter-mination of chemical composition shall be taken to representthe following:7.2.1 A sample shall be taken from each of
36、 two representa-tive castings selected from each lot defined in Section 6.2.1.7.3 Methods of SamplingSamples from die castings fordetermination of chemical composition shall be taken inaccordance with one of the following methods:7.3.1 Samples for chemical analysis shall be taken from thematerial by
37、 drilling, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain a weight of preparedsample not less than 75 g. Sampling shall be in accordancewith Practice B953.7.3.2 By agreement, an appropriate spectrographic samplemay be prepared at time of manufacture.7.3.3 The method
38、of sampling cast products for spectro-chemical and other methods of analysis shall be suitable for theform of material being analyzed and the type of analyticalmethod used.7.4 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitablechemical, spectrochemica
39、l (Test Method B954), or other meth-ods. In case of dispute, the results secured by Test MethodsB954 shall be the basis of acceptance.8. Mechanical Properties and Tests8.1 Unless specified in the contract or purchase order orspecifically guaranteed by the manufacturer, acceptance ofdie castings unde
40、r these specifications shall not depend onmechanical properties determined by tension or impact tests.Tables X1.1 and X1.2 show typical mechanical properties andcharacteristics. When tension or impact tests are made, thetension test specimen shown in Fig. 13 of Methods B557, andthe impact test speci
41、men shown in Fig. 6 of Test Methods E23shall be used.8.2 When specified in the contract or purchase order, diecastings shall withstand proof tests without failure as definedby agreement between the purchaser and the producer orsupplier.9. Permissible Variations in Dimensions9.1 Permissible variation
42、s in dimensions shall be within thelimits specified on the drawings or in the contract or purchaseorder.9.1.1 Any dimensions for which a tolerance is not specifiedshall be in accord with ADCI Product Standard Series E1 toE16 “E” Series Product Standards inclusive.9.2 Dimensional tolerance deviations
43、 waived by the pur-chaser shall be confirmed in writing to the producer or supplier.10. General Quality10.1 Internal SoundnessWhen specified, the soundness ofdie castings shall conform to standards or requirements agreedupon between the producer or supplier and the purchaser. Thenumber and extent of
44、 imperfections shall not exceed thosespecified by the purchaser. The standards or requirements mayconsist of radiographs in accordance with Reference Radio-graphs E505, photographs, or sectioned die castings.10.2 Imperfections inherent in die castings shall not because for rejection provided it is d
45、emonstrated that the diecastings are in accordance with the requirements and standardsagreed upon.10.3 WorkmanshipDie castings shall be of uniformquality, free from injurious discontinuities that will adverselyaffect their serviceability.10.4 FinishWhen specified in the contract or purchaseorder the
46、 as-cast surface finish required shall conform tostandards agreed upon between the purchaser and the produceror supplier, or as prescribed in ADCI Product Standard E18“E” Series Product Standards.10.5 Pressure TightnessWhen specified in the contract orpurchase order the pressure tightness of die cas
47、tings shallconform to standards agreed upon between the purchaser andthe producer or supplier, or as prescribed in ADCI ProductStandard E17 “E” Series Product Standards.11. Source Inspection11.1 If the purchaser desires that his representative inspector witness the inspection and testing of the prod
48、uct prior toshipment, such agreement shall be made by the purchaser andproducer or supplier as part of the contract or purchase order.11.2 When such inspection or witness of inspection andtesting is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facili
49、ties to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests shall be conducted so there is nounnecessary interference with the producers operations.12. Rejection and Retest12.1 When one or more samples, depending on the ap-proved sampling plan, fail to meet the requirements of thisspecification, the represented lot is subject to rejection exceptas otherwise provided in 12.2.12.2 Lots rejected for failure to meet the requirements ofthis specification may be resubmitted for test provided:B9413312.2.1 The producer has removed
