1、Designation: B 199 07Standard Specification forMagnesium-Alloy Permanent Mold Castings1This standard is issued under the fixed designation B 199; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number i
2、n parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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. Scope1.1 This specification covers magnesium alloy permanentmold casti
3、ng 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 th
4、eresponsibility 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 specific
5、ation to theextent referenced herein:2.2 ASTM Standards:2B 296 Practice for Temper Designations of MagnesiumAlloys, Cast and WroughtB 557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB 660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB 66
6、1 Practice for Heat Treatment of Magnesium AlloysB 951 Practice for Codification of Unalloyed Magnesiumand Magnesium-Alloys, Cast and WroughtE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE35
7、Test Methods for Chemical Analysis of Magnesiumand Magnesium AlloysE88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE94 Guide for Radiographic ExaminationE 155 Reference Radiographs for Inspection of Aluminumand Magnesium CastingsE 165 Test
8、Method for Liquid Penetrant ExaminationE 527 Practice for Numbering Metals and Alloys (UNS)2.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.4 Military Specification:MIL-M-6857 Heat Treatment of Magnesium Alloy Cast-ings33. Terminology3.1 Definitions:3.1.1 permanent mol
9、d castinga metal object produced byintroducing molten 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 castinga permanent mold cast-ing which is made using an expendable core such as bondedsand.4.
10、Ordering Information4.1 Orders for castings under this specification shall includethe following information:4.1.1 Quantity of each casting,4.1.2 Alloy (Section 7 and Table 1),4.1.3 Temper (Section 8 and Table 2),4.1.4 Minimum properties of specimens cut from castings,if required (see section 9.3),4.
11、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 section 11.1.1),4.1.8 Special inspection requirements (see 11.2),4.1.9 Whether certif
12、ication is required (see 13.1), and4.1.10 Whether marking for identification is required (see14.1).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
13、 edition approved June 1, 2007. Published June 2007. Originallyapproved in 1945. Last previous edition approved in 2005 as B 199 99 (2005).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume
14、 information, refer to the standards 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, W
15、est Conshohocken, PA 19428-2959, United States.5. Manufacture5.1 The responsibility of furnishing castings that can be laidout and machined to the finished dimensions within thepermissible variations specified, as shown on the blueprints ordrawings, shall rest with the supplier, except when molds ar
16、efurnished by the purchaser. Sufficient stock shall be allowed forshrinkage, and where requested, for finishing; castings ofexcessive weight shall not be furnished.5.2 The castings may be subjected to the heat treatmentnecessary to produce material that will conform to the require-ments specified. H
17、eat 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 Quality6.1 The castings shall be of uniform quality and condition,free of cracks or other injurious defects, and shall be wellcleaned by
18、 sand blasting or any other approved process beforeinspection.7. Chemical Composition7.1 LimitsThe material shall conform to the chemicalcomposition limits prescribed in Table 1. Conformance shall bedetermined by analyzing samples taken when the castings arepoured, or by analyzing samples taken from
19、 the finishedproduct. If the chemical composition has been determinedTABLE 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 the
20、 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 analys
21、is shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.Alloy NumberBComposition, %ASTM UNS Iron Magnesium AluminumManga-neseZinc Rare Earths Zirconium Silicon Copper NickelTotalCOtherImpuri-tiesOthersEachAM100A M10100 . remainder 9.3 to
22、 10.7 0.100.35 0.30 . . 0.30 0.10 0.01 0.30 .AZ81A M11810 . remainder 7.0 to 8.1 0.130.35 0.40 to 1.0 . . 0.30 0.10 0.01 0.30 .AZ91C M11914 . remainder 8.1 to 9.3 0.130.35 0.40 to 1.0 . . 0.30 0.10 0.01 0.30 .AZ91E M11919 0.005Dremainder 8.1 to 9.3 0.170.35 0.40 to 1.0 . . 0.20 0.015 0.0010 0.30 0.0
23、1AZ92A M11920 . remainder 8.3 to 9.7 0.100.35 1.6 to 2.4 . . 0.30 0.25 0.01 0.30 .EQ21AEM18330 . remainder . . . 1.5 to 3.0F0.40 to 1.0 . 0.050.10 0.01 0.30 .EZ33A M12330 . remainder . . 2.0 to 3.1 2.5 to 4.0 0.50 to 1.0 . 0.10 0.01 0.30 .QE22AGM18220E. remainder . . . 1.8 to 2.5F0.40 to 1.0 . 0.10
24、0.01 0.30 .ALimits are in weight percent max unless shown as a range or stated otherwise.BASTM alloy designations were established in accordance with Practice B 951. UNS designations were established in accordance with Practice E 527.CIncludes listed elements for which no specific limit is shown.DIf
25、 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) shall be 2.0 to 3.0, inclusive.TABLE 2 Tensile RequirementsNOTEFor purpos
26、es 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 with the rounding method of Practice E29.Alloy NumberTemperATensile
27、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 M11810 T4 34.0 (234) 11.0 (76) 7AZ91C M11914 F 23.0 (158) 11.0 (76)CT4
28、 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 M18330 T6 34.0 (234) 25.0 (172) .EZ33A M12330 T5 20.0 (138) 14.0 (96) 2
29、QE22A M18220 T6 35.0 (241) 25.0 (172) 2AThese temper designations were established in accordance with Practice B 296.BSee X1.3.CNot required.B199072during the course of manufacture, sampling and analysis of thefinished product is not necessary.7.2 Number of SamplesThe number of samples taken fordete
30、rmination 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 castings or test bars,a sample shall be taken to repre
31、sent 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 following methods:7.3.1 Samples for chemical analysis sh
32、all 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 spectrochemical or other methods ofanalysis shall be taken by m
33、ethods suitable for the form ofmaterial being analyzed and the type of analytical methodused.7.4 Methods of Chemical AnalysisAny suitable method ofchemical analysis may be used. In case of dispute, the analysisshall be made by methods given in Test Methods E35or anyother standard methods of analysis
34、 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 B 661 or with Military Specification MIL-M-6857.9. Tensile Requirements Tensile Requirements9
35、.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 melt. Ifthe castings are t
36、o 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 were subjected.9.2.1 Each
37、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 charge.9.3 If test bars
38、 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 shall be agreed to by t
39、he 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. 8 of TestMethods B 557. They shall not be machined prior to testingexcept to adapt the grip ends to the holders
40、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 supplier and the purchas
41、ershall agree on an alternative procedure.9.5 Test MethodsThe tension tests shall be made inaccordance with Test Methods B 557.10. Finish10.1 Depending on casting processing and end use require-ments, castings should be protected by the use of chromepickling, anodizing, resin sealing, or other appro
42、ved methodsprior 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 suppliers works, the s
43、upplier 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 works.11.2 Specia
44、l 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 Methods E 165, and the requiredsensitivity shall be spe
45、cified.11.3.2 Acceptable standards for discontinuities shall beagreed upon, including size and frequency per unit area andlocation.11.4 Radiographic Inspection:11.4.1 When specified, radiographic inspection shall be inaccordance with Guide E 94 and Reference E 155.11.4.2 Radiographic acceptance shal
46、l 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
47、 the supplier and the purchaser.12. Rejection and Retest12.1 Material failing to conform to the requirements of thisspecification may be rejected. If rejected, the supplier shall beresponsible only for replacement of the material to the pur-chaser. As much as possible of the rejected original materi
48、alshall be returned to the supplier.12.2 RetestsIf the results of the tension tests of alloys inheat-treated tempers do not conform to the requirementsprescribed in Table 2, the castings may be re-heat treated oncein an attempt to meet the required properties. The results ofB199073acceptable tests s
49、hall conform to the tensile properties require-ments specified in Table 2. Castings still not conforming afterthe re-heat treatment shall be rejected.13. Certification13.1 The supplier shall, on request, furnish to the purchasera certificate stating that the material has been sampled, tested,and inspected in accordance with this specification and has metthe requirements14. Product Marking14.1 Unless otherwise specified, each casting shall bemarked with the applicable drawing or part number.15. Packaging and Package Marking15.1 PackagingUnless otherwise specif
