1、Designation: B199 17Standard Specification forMagnesium-Alloy Permanent Mold Castings1This standard is issued under the fixed designation B199; 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
2、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. Scope*1.1 This specification covers magnesium alloy permanentmold ca
3、sting alloys designated as shown in Table 1.1.2 The values stated in inch-pound units are to be regardedas the standard. The SI values given in parentheses areprovided for information only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is
4、 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.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization es
5、tablished in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance fo
6、rm a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B93/B93M Specification for Magnesium Alloys in IngotForm for Sand Castings, Permanent Mold Castings, andDie CastingsB296 Practice for Temper Designations of MagnesiumAlloys, Cast and WroughtB557 Test Methods for Tensi
7、on Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB661 Practice for Heat Treatment of Magnesium AlloysB951 Practice for Codification of Unalloyed Magnesium andMagnesium-Alloys, Cast and WroughtB953 Practice for Samp
8、ling 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 SpecificationsE88 Practice for Sampling Nonferrous Metals
9、 and Alloys inCast Form for Determination of Chemical CompositionE94 Guide for Radiographic ExaminationE155 Reference Radiographs for Inspection of Aluminumand Magnesium CastingsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE527 Practice for Numbering Metals and Alloys in theUnif
10、ied Numbering System (UNS)2.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.4 Aerospace Materials Specification:4AMS 2768 Heat Treatment of Magnesium Alloy Castings3. Terminology3.1 Definitions:3.1.1 permanent mold casting, na metal object producedby introducing molten
11、metal by gravity or low pressure into amold constructed of durable material, usually iron or steel, andallowing it to solidify.3.1.2 semipermanent mold casting, na permanent moldcasting which is made using an expendable core such asbonded sand.4. Ordering Information4.1 Orders for castings under thi
12、s specification shall includethe following information: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, 2017. Published May
13、 2017. Originallyapproved in 1945. Last previous edition approved in 2012 as B199 12. DOI:10.1520/B0199-17.2For 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 stand
14、ards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.4Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,PA 15096-0001, http:/www.sa
15、e.org.*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 standard was developed in accordance with internationally recognized principles on standardizatio
16、n 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.14.1.1 Quantity of each casting,4.1.2 Alloy (Section 7 and Table 1),4.1.3 Temper (Section 8 and Tab
17、le 2),4.1.4 Minimum properties of specimens cut from castings,if required (see 9.3),4.1.5 Drawing showing dimensions of the castings (theamount of stock left for machine finish should be indicated),4.1.6 Surface treatment (see 10.1),4.1.7 Whether inspection is required at the manufacturersworks (see
18、 11.1.1),4.1.8 Special inspection requirements (see 11.2),4.1.9 Whether certification is required (see 13.1), and4.1.10 Whether marking for identification is required (see14.1).5. Manufacture5.1 The responsibility of furnishing castings that can be laidout and machined to the finished dimensions wit
19、hin thepermissible variations specified, as shown on the blueprints ordrawings, shall rest with the supplier, except when molds arefurnished by the purchaser. Sufficient stock shall be allowed forshrinkage, and where requested, for finishing; castings ofexcessive weight shall not be furnished.5.2 Th
20、e castings may be subjected to the heat treatmentnecessary to produce material that will conform to the require-ments specified. Heat treatment shall be performed on thewhole of a casting, never on a part only, and shall be appliedin a manner that will produce the utmost uniformity.6. General Qualit
21、y6.1 The castings shall be of uniform quality and condition,free of cracks or other injurious defects, and shall be wellcleaned by sand blasting or any other approved process beforeinspection.7. Chemical Composition7.1 LimitsThe material shall conform to the chemicalcomposition limits prescribed in
22、Table 1. Conformance shall bedetermined by analyzing samples taken when the castings arepoured, or by analyzing samples taken from the finishedproduct. If the chemical composition has been determinedduring the course of manufacture, sampling and analysis of thefinished product is not necessary.7.2 N
23、umber of SamplesThe number of samples taken fordetermination of chemical composition shall be as follows:7.2.1 When samples are taken at the time the castings arepoured, at least one sample shall be taken from each melt of2000 lb (907 kg) or fraction thereof.7.2.2 When samples are taken from the cas
24、tings or test bars,a sample shall be taken to represent each 2000 lb (907 kg) orfraction thereof in the shipment except that not more than onesample shall be required per casting.7.3 Methods of SamplingSamples for determination ofchemical composition shall be taken in accordance with one ofthe follo
25、wing methods:7.3.1 Samples for chemical analysis shall be taken from thematerial by 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 E88.7.3.2 Samples for spectrochemi
26、cal analysis shall be inaccordance with Practice B953, or other methods of analysisshall be taken by methods suitable for the form of materialbeing analyzed and the type of analytical method used.7.4 Methods of Chemical AnalysisAny suitable method ofchemical analysis may be used. In case of dispute,
27、 the analysisshall be made by methods given in Test Method B954 or anyTABLE 1 Chemical Composition LimitsANOTE 1Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements issuspected or indicated in amounts greater than th
28、e specified limits, further analysis shall be made to determine that these elements are not present in excessof the specified limits.NOTE 2The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated valueobtained from analy
29、sis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.Alloy NumberBComposition, %ASTM UNSMagne-siumAluminum Copper IronManga-neseNickelRareEarthsSilicon ZincZirco-niumOthersEachTotalCOtherImpuritiesAM100A M10100 remainder 9.310.7 0.10
30、 . . . 0.100.35 0.01 . . . 0.30 0.30 . . . . . . 0.30AZ81A M11810 remainder 7.08.1 0.10 . . . 0.130.35 0.01 . . . 0.30 0.401.0 . . . . . . 0.30AZ91C M11914 remainder 8.19.3 0.10 . . . 0.130.35 0.01 . . . 0.30 0.401.0 . . . . . . 0.30AZ91E M11919 remainder 8.19.3 0.015 0.005D0.170.35 0.0010 . . . 0.2
31、0 0.401.0 . . . 0.01 0.30AZ92A M11920 remainder 8.39.7 0.25 . . . 0.100.35 0.01 . . . 0.30 1.62.4 . . . . . . 0.30EQ21AEM18330 remainder . . . 0.050.10 . . . . . . 0.01 1.53.0F. . . . . . 0.401.0 . . . 0.30EZ33A M12330 remainder . . . 0.10 . . . . . . 0.01 2.54.0 . . . 2.03.1 0.501.0 . . . 0.30QE22A
32、GM18220Eremainder . . . 0.10 . . . . . . 0.01 1.82.5F. . . . . . 0.401.0 . . . 0.30ALimits are in weight percent max unless shown as a range or stated otherwise.BASTM alloy designations were established in accordance with Practice B951. UNS designations were established in accordance with Practice E
33、527.CIncludes listed elements for which no specific limit is shown.DIf iron exceeds 0.005 %, the iron to manganese ratio shall not exceed 0.032.ESilver content for Alloy EQ21A (M18330) shall be 1.3 to 1.7 %.FRare earth elements are in the form of didymium.GSilver content for Alloy QE22A (M18220) sha
34、ll be 2.0 to 3.0, inclusive.B199 172other standard methods of analysis approved by ASTM unlesssome other method is agreed upon.8. Heat Treatment8.1 Unless otherwise specified, heat treatment for the appli-cable tempers designated in Table 2 shall be in accordance withPractice B661 or with AMS 2768.9
35、. Tensile Requirements9.1 LimitsThe tension test specimens representing thecastings shall conform to the requirements of Table 2.9.2 Number of TestsAt least one tension test specimenshall be cast from each melt of 2000 lb (907 kg) or fractionthereof to represent the castings poured from the same mel
36、t. Ifthe castings are to be heat treated, the specimens shall be heattreated with production castings of the same alloy and in thesame temper as the specimens. The specimens shall then betested to judge the response of their corresponding melts to thetype of heat treatment to which the specimens wer
37、e subjected.9.2.1 Each heat-treating furnace charge shall include at leastone tension test specimen poured from a production melt. Suchspecimens shall be of the same alloy and in the same temper asthe castings, and shall be tested to judge the quality of theheat-treating operation given the furnace
38、charge.9.3 If test bars are cut from castings, the number andlocation shall be as agreed upon between the supplier and thepurchaser. Depending on the radiographic quality specified(see 11.4), test bars cut from casting may not meet therequirements of Table 2. Mechanical property limits from cutbars
39、shall be agreed to by the supplier and purchaser.9.4 Test SpecimensThe tension test specimens shall beseparately cast in a permanent mold and shall be cast to size inaccordance with the dimensions shown in Fig. 9 of TestMethod B557. They shall not be machined prior to testingexcept to adapt the grip
40、 ends to the holders of the testingmachine in such a manner as to ensure an axial load.9.4.1 If any tension test specimen is improperly machinedor shows flaws upon testing, it may be discarded and anotherspecimen from the same heat or melt used instead. If noadditional specimen is available, the sup
41、plier and the purchasershall agree on an alternative procedure.9.5 Test MethodsThe tension tests shall be made inaccordance with Test Method B557.10. Finish10.1 Depending on casting processing and end userequirements, castings should be protected by the use ofchrome pickling, anodizing, resin sealin
42、g, or other approvedmethods prior to shipment (see X1.4).11. Inspection11.1 If the purchaser desires that inspection be made at thesuppliers works where the material is made, it shall be sostated in the contract or purchase order.11.1.1 If the purchaser elects to have the inspection made atthe suppl
43、iers works, the supplier shall afford the inspectorrepresenting the purchaser all reasonable facilities to satisfyhim that the material is being furnished in accordance with thisspecification. All tests and inspections shall be so conducted asnot to interfere unnecessarily with the operation of the
44、works.11.2 Special inspection requirements such as simulatedservice, pressure testing, X-ray, or fluorescent penetrant mustbe stated on the order.11.3 Liquid Penetrant Inspection:11.3.1 When specified, liquid penetrant inspection shall bein accordance with Test Method E165, and the requiredsensitivi
45、ty shall be specified.TABLE 2 Tensile RequirementsNOTE 1For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to thenearest 0.1 ksi and each value for elongation shall be rounded to the nearest 0.5 % both in accordance wi
46、th the rounding method of Practice E29.Alloy NumberTemperATensile Strength, min.ksi (MPa)Yield StrengthB(0.2 %offset) min. ksi (MPa)Elongation in2 in., (50.8 mm)min., %ASTM UNSAM100A M10100 F 20.0 (138) 10.0 (69)CT4 34.0 (234) 10.0 (69) 6T6 34.0 (234) 15.0 (103) 2T61 34.0 (234) 17.0 (117)CAZ81A M118
47、10 T4 34.0 (234) 11.0 (76) 7AZ91C M11914 F 23.0 (158) 11.0 (76)CT4 34.0 (234) 11.0 (76) 7T5 23.0 (158) 12.0 (83) 2T6 34.0 (234) 16.0 (110) 3AZ91E M11919 T6 34.0 (234) 16.0 (110) .AZ92A M11920 F 23.0 (158) 11.0 (76)CT4 34.0 (234) 11.0 (76) 6T5 23.0 (158) 12.0 (83)CT6 34.0 (234) 18.0 (124)CEQ21A M1833
48、0 T6 34.0 (234) 25.0 (172) .EZ33A M12330 T5 20.0 (138) 14.0 (96) 2QE22A M18220 T6 35.0 (241) 25.0 (172) 2AThese temper designations were established in accordance with Practice B296.BSee X1.3.CNot required.B199 17311.3.2 Acceptable standards for discontinuities shall beagreed upon, including size an
49、d frequency per unit area andlocation.11.4 Radiographic Inspection:11.4.1 When specified, radiographic inspection shall be inaccordance with Guide E94 and Reference E155.11.4.2 Radiographic acceptance shall be in accordance withrequirements selected from Table 3. Any modifications of thistable, the frequency per unit area, and location should also beagreed upon.11.4.3 The number, film size, and orientation of radiographsand the number of castings radiographically inspected shall beagreed upon between the supplier and the p
