ASTM B199-2012 Standard Specification for Magnesium-Alloy Permanent Mold Castings《镁合金永久铸模铸件用标准规格》.pdf

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1、Designation: B199 07 B199 12Standard 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 nu

2、mber in 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 Department of Defense.1. Scope Scope*1.1 This specification covers magnesium alloy permane

3、nt mold casting alloys designated as shown in Table 1.1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values given in parentheses are providedfor information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with it

4、s use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on date of order acceptance form a part of

5、this specification to the extentreferenced herein:2.2 ASTM Standards:2B296 Practice for Temper Designations of Magnesium Alloys, Cast and WroughtB557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy ProductsB660 Practices for Packaging/Packing of Aluminum and Magnesium

6、 ProductsB661 Practice for Heat Treatment of Magnesium AlloysB951 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 Magnesium and Magnesium Allo

7、ys by Atomic Emission SpectrometryE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE35 Test Methods for Chemical Analysis of Magnesium and Magnesium Alloys (Withdrawn 2008)3E88 Practice for Sam

8、pling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical CompositionE94 Guide for Radiographic ExaminationE155 Reference Radiographs for Inspection of Aluminum and Magnesium CastingsE165 Practice for Liquid Penetrant Examination for General IndustryE527 Practice for Numbering Me

9、tals and Alloys in the Unified Numbering System (UNS)2.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.4 Military Aerospace Materials Specification:4MIL-M-6857AMS 2768 Heat Treatment of Magnesium Alloy Castings3. Terminology3.1 Definitions:3.1.1 permanent mold castinga

10、metal object produced by introducing molten metal by gravity or low pressure into a moldconstructed of durable material, usually iron or steel, and allowing it to solidify.3.1.2 semipermanent mold castinga permanent mold casting which is made using an expendable core such as bonded sand.4. Ordering

11、Information4.1 Orders for castings under this specification shall include the following information:4.1.1 Quantity of each casting,4.1.2 Alloy (Section 7 and Table 1),*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, We

12、st Conshohocken, PA 19428-2959. United States14.1.3 Temper (Section 8 and Table 2),4.1.4 Minimum properties of specimens cut from castings, if required (see section 9.3),4.1.5 Drawing showing dimensions of the castings (the amount of stock left for machine finish should be indicated),4.1.6 Surface t

13、reatment (see 10.1),1 This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on MagnesiumAlloy Cast and Wrought Products.Current edition approved June 1, 2007Nov. 1, 2012. Published June 2007November 2012.

14、 Originally approved in 1945. Last previous edition approved in 20052007 asB199 99 (2005).B199 07. DOI: 10.1520/B0199-07. 10.1520/B0199-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolu

15、me information, refer to the standards Document Summary page on the ASTM website.3 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.4 Available from SAE International (SAE), 400 Commonwealth Dr.,

16、Warrendale, PA 15096-0001, http:/www.sae.org.TABLE 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 specified limits, furth

17、er 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 analysis shall be rounded to t

18、he nearest unit in the last right-hand place of figures used in expressing the specified limit.Alloy NumberB Composition, %ASTM UNS Iron Magnesium Aluminum Manga-nese Zinc Rare Earths Zirconium Silicon Copper NickelTotalCOtherImpuri-tiesOthersEachAM100A M10100 . remainder 9.3 to 10.7 0.100.35 0.30 .

19、 . 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 0.005D remainder 8.1 to 9.3 0.170.35 0.40 to 1.0 . . 0.20 0.015 0.0010 0.30 0.01AZ92A M11920 . rema

20、inder 8.3 to 9.7 0.100.35 1.6 to 2.4 . . 0.30 0.25 0.01 0.30 .EQ21AE M18330 . remainder . . . 1.5 to 3.0F 0.40 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 .QE22AG M18220E . remainder . . . 1.8 to 2.5F 0.40 to 1.0 . 0.10 0.01 0.30 .A Li

21、mits are in weight percent max unless shown as a range or stated otherwise.B ASTM alloy designations were established in accordance with Practice B951. UNS designations were established in accordance with Practice E527.C Includes listed elements for which no specific limit is shown.D If iron exceeds

22、 0.005 %, the iron to manganese ratio shall not exceed 0.032.E Silver content for Alloy EQ21A (M18330) shall be 1.3 to 1.7 %.F Rare earth elements are in the form of didymium.G Silver content for Alloy QE22A (M18220) shall be 2.0 to 3.0, inclusive.TABLE 2 Tensile RequirementsNOTE 1For purposes of de

23、termining 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 NumberTemperA Tensile Strengt

24、h, 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 3

25、4.0 (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)

26、2QE22A M18220 T6 35.0 (241) 25.0 (172) 2A These temper designations were established in accordance with Practice B296.B See X1.3.C Not required.B199 1224.1.7 Whether inspection is required at the manufacturers works (see section 11.1.1),4.1.8 Special inspection requirements (see 11.2),4.1.9 Whether

27、certification is required (see 13.1), and4.1.10 Whether marking for identification is required (see 14.1).5. Manufacture5.1 The responsibility of furnishing castings that can be laid out and machined to the finished dimensions within the permissiblevariations specified, as shown on the blueprints or

28、 drawings, shall rest with the supplier, except when molds are furnished by thepurchaser. Sufficient stock shall be allowed for shrinkage, and where requested, for finishing; castings of excessive weight shallnot be furnished.5.2 The castings may be subjected to the heat treatment necessary to produ

29、ce material that will conform to the requirementsspecified. Heat treatment shall be performed on the whole of a casting, never on a part only, and shall be applied in a manner thatwill produce the utmost uniformity.6. General Quality6.1 The castings shall be of uniform quality and condition, free of

30、 cracks or other injurious defects, and shall be well cleanedby sand blasting or any other approved process before inspection.7. Chemical Composition7.1 LimitsThe material shall conform to the chemical composition limits prescribed in Table 1. Conformance shall bedetermined by analyzing samples take

31、n when the castings are poured, or by analyzing samples taken from the finished product.If the chemical composition has been determined during the course of manufacture, sampling and analysis of the finished productis not necessary.7.2 Number of SamplesThe number of samples taken for determination o

32、f chemical composition shall be as follows:7.2.1 When samples are taken at the time the castings are poured, at least one sample shall be taken from each melt of 2000lb (907 kg) or fraction thereof.7.2.2 When samples are taken from the castings or test bars, a sample shall be taken to represent each

33、 2000 lb (907 kg) orfraction thereof in the shipment except that not more than one sample shall be required per casting.7.3 Methods of SamplingSamples for determination of chemical composition shall be taken in accordance with one of thefollowing methods:7.3.1 Samples for chemical analysis shall be

34、taken from the material by drilling, sawing, milling, turning, or clipping arepresentative piece or pieces to obtain a weight of prepared sample not less than 75 g. Sampling shall be in accordance withPractice E88.7.3.2 Samples for spectrochemical analysis shall be in accordance with Practice B953,

35、or other methods of analysis shall betaken by methods suitable for the form of material being analyzed and the type of analytical method used.7.4 Methods of Chemical AnalysisAny suitable method of chemical analysis may be used. In case of dispute, the analysis shallbe made by methods given in Test M

36、ethod E35B954 or any other standard methods of analysis approved by ASTM unless someother method is agreed upon.8. Heat Treatment8.1 Unless otherwise specified, heat treatment for the applicable tempers designated in Table 2 shall be in accordance withPractice B661 or with Military Specification MIL

37、-M-6857. AMS 2768.9. Tensile Requirements9.1 LimitsThe tension test specimens representing the castings shall conform to the requirements of Table 2.9.2 Number of TestsAt least one tension test specimen shall be cast from each melt of 2000 lb (907 kg) or fraction thereofto represent the castings pou

38、red from the same melt. If the castings are to be heat treated, the specimens shall be heat treated withproduction castings of the same alloy and in the same temper as the specimens. The specimens shall then be tested to judge theresponse of their corresponding melts to the type of heat treatment to

39、 which the specimens were subjected.9.2.1 Each heat-treating furnace charge shall include at least one tension test specimen poured from a production melt. Suchspecimens shall be of the same alloy and in the same temper as the castings, and shall be tested to judge the quality of theheat-treating op

40、eration given the furnace charge.9.3 If test bars are cut from castings, the number and location shall be as agreed upon between the supplier and the purchaser.Depending on the radiographic quality specified (see 11.4), test bars cut from casting may not meet the requirements of Table 2.Mechanical p

41、roperty limits from cut bars shall be agreed to by the supplier and purchaser.B199 1239.4 Test SpecimensThe tension test specimens shall be separately cast in a permanent mold and shall be cast to size inaccordance with the dimensions shown in Fig. 8 of Test Method B557. They shall not be machined p

42、rior to testing except to adaptthe grip ends to the holders of the testing machine in such a manner as to ensure an axial load.9.4.1 If any tension test specimen is improperly machined or shows flaws upon testing, it may be discarded and anotherspecimen from the same heat or melt used instead. If no

43、 additional specimen is available, the supplier and the purchaser shall agreeon an alternative procedure.9.5 Test MethodsThe tension tests shall be made in accordance with Test Method B557.10. Finish10.1 Depending on casting processing and end use requirements, castings should be protected by the us

44、e of chrome pickling,anodizing, resin sealing, or other approved methods prior to shipment (see X1.4).11. Inspection11.1 If the purchaser desires that inspection be made at the suppliers works where the material is made, it shall be so statedin the contract or purchase order.11.1.1 If the purchaser

45、elects to have the inspection made at the suppliers works, the supplier shall afford the inspectorrepresenting the purchaser all reasonable facilities to satisfy him that the material is being furnished in accordance with thisspecification. All tests and inspections shall be so conducted as not to i

46、nterfere unnecessarily with the operation of the works.11.2 Special inspection requirements such as simulated service, pressure testing, X-ray, or fluorescent penetrant must be statedon the order.11.3 Liquid Penetrant Inspection:11.3.1 When specified, liquid penetrant inspection shall be in accordan

47、ce with Test Method E165, and the required sensitivityshall be specified.11.3.2 Acceptable standards for discontinuities shall be agreed upon, including size and frequency per unit area and location.11.4 Radiographic Inspection:11.4.1 When specified, radiographic inspection shall be in accordance wi

48、th Guide E94 and Reference E155.11.4.2 Radiographic acceptance shall be in accordance with requirements selected from Table 3. Any modifications of this table,the frequency per unit area, and location should also be agreed upon.11.4.3 The number, film size, and orientation of radiographs and the num

49、ber of castings radiographically inspected shall beagreed upon between the supplier and the purchaser.12. Rejection and Retest12.1 Material failing to conform to the requirements of this specification may be rejected. If rejected, the supplier shall beresponsible only for replacement of the material to the purchaser. As much as possible of the rejected original material shall bereturned to the supplier.12.2 RetestsIf the results of the tension tests of alloys in heat-treated tempers do not conform to the requirements prescribedin Table 2, the castings