1、Designation: B94 13B94 18Standard 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.Anumber in parenthes
2、es indicates the year of last reapproval.Asuperscriptepsilon () 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*1.1 This specification covers magnesium-alloy die castings. Current alloy
3、 compositions are specified under the designationsshown in Table 1.21.2 The values stated in inch-pound units are standard. The SI values in parentheses are provided for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is
4、the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principle
5、s on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect on date
6、 of order acceptance form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:3B93/B93M Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die CastingsB557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesi
7、um-Alloy ProductsB660 Practices for Packaging/Packing of Aluminum and Magnesium ProductsB951 Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and WroughtB953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical AnalysisB954 Test Method for Analysis of M
8、agnesium and Magnesium Alloys by Atomic Emission SpectrometryE23 Test Methods for Notched Bar Impact Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for
9、 Determination of Chemical CompositionE505 Reference Radiographs for Inspection of Aluminum and Magnesium Die CastingsE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)2.3 American Die Casting Institute:3“E” Series Product Standards2.4 Federal Standards:4FED-STD-123
10、Marking for Shipment (Civil Agencies)SAE AMS-STD-184 Identification Marking of Aluminum, Magnesium and Titanium2.5 Military Standard:4MIL-STD-129 Marking for Shipment and Storage1 This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsi
11、bility of Subcommittee B07.04 on MagnesiumAlloy Cast and Wrought Products.Current edition approved May 1, 2013May 1, 2018. Published June 2013May 2018. Originally approved in 1934. Last previous edition approved in 20072013 asB94 07.B94 13. DOI: 10.1520/B0094-13.10.1520/B0094-18.2 SAE specifications
12、 No. 501 and 501A conform to the requirements for Alloy AZ91A and AZ91B respectively.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary p
13、age on the ASTM website.4 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what
14、 changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the
15、official document.*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 States13. Terminology3.1 Definitions:3.1.1 die castinga metal object produced by the introduction of molten me
16、tal under substantial pressure into a metal die andcharacterized by a high degree of fidelity to the die cavity.4. Ordering Information4.1 Orders for die castings shall include the following basic information:4.1.1 This specification number and date,4.1.2 Quantity and delivery schedule, as required,
17、4.1.3 Part name and number,4.1.4 Alloy (Table 1), and4.1.5 Drawing of die casting, when required, giving all necessary dimensions and showing latest revisions and allowances formachining, if any. Location of ejector pin marks or parting lines shall be at the option of the producer, unless specifical
18、ly designatedon the drawing.TABLE 1 Chemical RequirementsA,B,C,DAlloy Composition,%DesignationBUNS Aluminum Manganese Rare Earth Strontium Zinc Copper,maxIron, max Silicon Nickel OtherMetallicImpurities,max, eachMagnesiumAS41A M10410 3.5-5.0 0.20-0.50 . . 0.12 0.06 . 0.50-1.5 0.03 . remainderAS41B M
19、10412 3.5-5.0 0.35-0.7E . . 0.12 0.02 0.0035E 0.50-1.5 0.002 0.02 remainderAM50A M10500 4.4-5.4 0.26-0.6E . . 0.22 0.010 0.004E 0.10 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 0.005E 0.10 0.002 0.02 remainderAZ
20、91A M11910 8.3-9.7 0.13-0.50 . . 0.35-1.0 0.10 . 0.50 0.03 . remainderAZ91B M11912 8.3-9.7 0.13-0.50 . . 0.35-1.0 0.35 . 0.50 0.03 . remainderAZ91D M11916 8.3-9.7 0.15-0.50E . . 0.35-1.0 0.030 0.005E 0.10 0.002 0.02 remainderAJ52AF M17520 4.5-5.5 0.24-0.6E . 1.7-2.3 0.22 0.010 0.004E 0.10 0.001 0.01
21、 remainderAJ62AF M17620 5.5-6.6 0.24-0.6E . 2.0-2.8 0.22 0.010 0.004E 0.10 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 remainderAS21BF M10212 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 remainderTABLE 1 Chemical Composition Requirem
22、entsA,B,C,DAlloy Composition, %Desig.B UNS Al Mn RareEarth Sr Zn Cu, max Fe, max Si NiOtherMetallicImpurities,max, eachMgAS41A M10410 3.55.0 0.200.50 . . . . . . 0.12 0.06 . . . 0.501.5 0.03 . . . Rem.AS41B M10412 3.55.0 0.350.7E . . . . . . 0.12 0.02 0.0035E 0.501.5 0.002 0.02 Rem.AM50A M10500 4.45
23、.4 0.260.6E . . . . . . 0.22 0.010 0.004E 0.10 0.002 0.02 Rem.AM60A M10600 5.56.5 0.130.6 . . . . . . 0.22 0.35 . . . 0.50 0.03 . . . Rem.AM60B M10602 5.56.5 0.240.6E . . . . . . 0.22 0.010 0.005E 0.10 0.002 0.02 Rem.AZ91A M11910 8.39.7 0.130.50 . . . . . . 0.351.0 0.10 . . . 0.50 0.03 . . . Rem.AZ9
24、1B M11912 8.39.7 0.130.50 . . . . . . 0.351.0 0.35 . . . 0.50 0.03 . . . Rem.AZ91D M11916 8.39.7 0.150.50E . . . . . . 0.351.0 0.030 0.005E 0.10 0.002 0.02 Rem.AJ52AF M17520 4.55.5 0.240.6E . . . 1.72.3 0.22 0.010 0.004E 0.10 0.001 0.01 Rem.AJ62AF M17620 5.56.6 0.240.6E . . . 2.02.8 0.22 0.010 0.004
25、E 0.10 0.001 0.01 Rem.AS21A M10210 1.82.5 0.180.7 . . . . . . 0.20 0.01 0.005 0.71.2 0.001 0.01 Rem.AS21BF M10212 1.82.5 0.050.15 0.060.25 . . . 0.25 0.008 0.0035 0.71.2 0.001 0.01 Rem.A AnalysisAnalysis shall regularly be made only for the elements specifically mentioned in this table. If, however,
26、 the presence of other elements is suspected or indicatedin the course of routine analysis, further analysis shall be made to determine that these other elements are not in excess of 0.3 %.B The The following applies to all specified limits in this table: For purposes of acceptance and rejection an
27、observed value or a calculated value obtained from analysisshould be 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 prescribedin Section 3 of Practice E29.C Where Where single units are shown, these
28、 indicate the maximum amounts permitted.D ASTMASTM alloy designations were established in accordance with Practice B951, UNS designations were established in accordance with Practice E527.E In In alloys AS41B, AM50A, AJ52A, AM60B, AJ62A, and AZ91D, if either the minimum manganese limit or the maximu
29、m iron limit is not met, then the iron/manganeseratio shall not exceed 0.010, 0.015, 0.015, 0.021, 0.021, and 0.032, respectively.F Alloys AJ52A, AJ62A, and AS21B are patented compositions for elevated temperature applications. Interested parties are invited to submit information regarding theidenti
30、fication 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 wi
31、th 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.B94 1824.2 Additional tests, options, and special inspection requirement
32、s as provided below should be justified only on the basis ofneed. These shall be specified in the contract or purchase order, as additional procedures and extended delivery time may beinvolved.4.2.1 Chemical analysis (7.1.1),4.2.2 Quality assurance (Section 6),4.2.3 Special proof tests or mechanical
33、 properties (Section 8),4.2.4 General quality options for internal soundness or for finish (Section 10),4.2.5 Source inspection (Section 11),4.2.6 Certification (Section 12),4.2.7 Marking for identification (Section 14), and4.2.8 Special packaging (Section 15).5. Materials5.1 The magnesium alloys us
34、ed for the manufacture of die castings shall be such that the die castings produced will conformto the chemical composition requirements of this specification. Ingot in accordance with Specification B93/B93M may be used butis not restricted to this source.6. Quality Assurance6.1 Responsibility for I
35、nspectionWhen specified in the contract or purchase order, the producer or supplier is responsible forthe performance of all inspection and test requirements specified herein. Except as otherwise specified in the contract or order, theproducer or supplier may use his own or any other suitable facili
36、ties for the performance of the inspection and test requirementsspecified herein, unless disapproved by the purchaser. The purchaser shall have the right to perform any of the inspections and testsset forth in this specification. Quality assurance standards shall be agreed upon between the producer
37、or supplier and purchaserat the time a contract or order is placed.6.2 Lot DefinitionAn inspection lot shall be defined as follows:6.2.1 An inspection lot shall consist of the production from each die or compound die on each machine for each 24 h duringthe first week of normal operation and the prod
38、uction for each 48 h thereafter of normal operation. Any significant change in themachine, composition, die, or continuity of operation shall be considered as the start of a new lot. Die castings inspected by thismethod shall be so marked or handled during the finishing operations as not to lose the
39、ir identity.6.2.2 Each die casting of a randomly selected sample shall be examined to determine conformance to the requirements withrespect to general quality, dimensions, and identification marking. The producer or supplier may use a system of statistical qualitycontrol for such examinations.7. Che
40、mical Composition7.1 LimitsThe die casting shall conform to the requirements as to chemical composition prescribed in Table 1. Conformanceshall be determined by the producer by analyzing samples taken at the time castings are made. If the producer has determined thechemical composition of the metal
41、during the course of manufacture, he shall not be required to sample and analyze the finishedproduct.7.1.1 When a detailed chemical analysis is required with a shipment, it shall be called for in the contract or purchase order.7.1.2 If the producers or suppliers method of composition control is acce
42、ptable, sampling for chemical analysis may be waivedat the discretion of the purchaser.7.2 Number of SamplesWhen required, samples for determination of chemical composition shall be taken to represent thefollowing:7.2.1 A sample shall be taken from each of two representative castings selected from e
43、ach lot defined in Section 6.2.1.7.3 Methods of SamplingSamples from die castings for determination of chemical composition shall be taken in accordancewith one of the following methods:7.3.1 Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or cli
44、pping arepresentative piece or pieces to obtain a weight of prepared sample not less than 75 g. Sampling shall be in accordance withPractice B953.7.3.2 By agreement, an appropriate spectrographic sample may be prepared at time of manufacture.7.3.3 The method of sampling cast products for spectrochem
45、ical and other methods of analysis shall be suitable for the formof material being analyzed and the type of analytical method used.7.4 Method of AnalysisThe determination of chemical composition shall be made in accordance with suitable chemical,spectrochemical (Test Method B954), or other methods.
46、In case of dispute, the results secured by Test Methods B954 shall be thebasis of acceptance.B94 1838. Mechanical Properties and Tests8.1 Unless specified in the contract or purchase order orspecifically guaranteed by the manufacturer, acceptance of die castings under these specifications shall not
47、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, the tension test specimen shown in Fig. 13 of Test Methods B557, and theimpact test specimen shown in Fig. 6 of Tes
48、t Methods E23 shall be used.8.2 When specified in the contract or purchase order, die castings shall withstand proof tests without failure as defined byagreement between the purchaser and the producer or supplier.9. Permissible Variations in Dimensions9.1 Permissible variations in dimensions shall b
49、e within the limits specified on the drawings or in the contract or purchase order.9.1.1 Any dimensions for which a tolerance is not specified shall be in accord with ADCI Product Standard Series E1 to E16“E” Series Product Standards inclusive.9.2 Dimensional tolerance deviations waived by the purchaser shall be confirmed in writing to the producer or supplier.10. General Quality10.1 Internal SoundnessWhen specified, the soundness of die castings shall conform to standards or requirements agreed uponbetween the producer or supplier
