1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2013 SAE InternationalAll rights reserved. No part of this publi
3、cation may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4484LAEROSPACE MATERIAL SPECIFICATIONAMS4484 REV. LIssued 1944-08Reaffirmed 2000-09Revised
5、 2013-09Superseding AMS4484KMagnesium Alloy Castings, Permanent Mold9.0Al - 2.0Zn (AZ92A-T6)Solution and Precipitation Heat Treated(Composition similar to UNS M11920)RATIONALEAMS4484L revises analysis for composition (3.1), clarifies when chemical analysis specimens are taken (3.4.1), revises Sampli
6、ng and Testing (4.3.1) and Protective Treatment (5.2) and is a Five Year Review and update of this specification.1. SCOPE1.1 FormThis specification covers a magnesium alloy in the form of permanent mold castings.1.2 ApplicationThese castings have been used typically for parts operating up to 300 F (
7、149 C), but usage is not limited to such applications.2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a speci
8、fic document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606
9、-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2175 Castings, Classification and InspectionAMS2360 Room Temperature Tensile Properties of CastingsAMS2475 Protective Treatments, Magnesium AlloysAMS2694 In Process Welding of CastingsSAE INTERNATIONAL AMS4484L Page 2 of 7AM
10、S2768 Heat Treatment of Magnesium Alloy CastingAMS2804 Identification, Castings2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM B 557 Tension Testing Wrought and Cast Aluminum and Magn
11、esium-Alloy ProductsASTM B 660 Packaging/Packing of Aluminum and Magnesium ProductsASTM B 953 Sampling Magnesium and Magnesium Alloys for Spectrochemical AnalysisASTM B 954 Analysis of Magnesium and Magnesium Alloys by Atomic Emission SpectrometryASTM E 1417/ E 1417M Liquid Penetrant TestingASTM E 1
12、742/ E 1742M Radiographic Examination3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined by spectrochemical methods in accordance with ASTM B 954, or by other analytical methods acceptable to purchaser.TABLE 1 - COMPOSITIONElement min maxAl
13、uminumZincManganeseSiliconCopperNickelOther Elements, each (3.1.1)Other Elements, total (3.1.1)Magnesium8.31.60.10-remainder9.72.4-0.300.100.010.100.303.1.1 Determination not required for routine acceptance.3.2 ConditionSolution and precipitation heat treated.3.3 CastingCastings shall be produced fr
14、om metal conforming to 3.1. Furnace or ladle additions of grain-refining elements or alloys are permissible. Molten metal taken from alloying furnaces, with or without additions of foundry operating scrap (gates, sprues, risers, and rejected castings), shall not be poured into castings unless first
15、converted to ingot, analyzed, and remelted or unless the composition of a sample taken after the last addition to the melt conforms to 3.1.SAE INTERNATIONAL AMS4484L Page 3 of 73.3.1 A melt shall be the metal withdrawn from a batch-furnace charge of 2000 pounds (907 kg) or less as melted for pouring
16、 castings or, when permitted by purchaser, a melt shall be 4000 pounds (1814 kg) or less of metal withdrawn from one continuous furnace in not more than eight consecutive hours.3.3.2 A lot shall be all castings poured from a single melt in not more than eight consecutive hours, solution and precipit
17、ation heat treated in the same heat treatment batch.3.4 Cast Test SpecimensChemical analysis specimens and tensile specimens shall be cast as follows and, when required, shall be supplied with the castings:3.4.1 Chemical Analysis SpecimensShall be cast from each melt after the last melt addition and
18、 shall be tested to qualify the melt lot as in 3.1.3.4.2 Tensile SpecimensShall be cast with each lot of castings, shall be of standard proportions conforming to ASTM B 557 with 0.500 inch (12.70 mm) diameter at the reduced parallel gage section, and shall be cast to size in permanent molds. Metal f
19、or the specimens shall be part of the melt that is used for the castings and shall be subjected to the same grain refining or alloying treatment given the metal for casting. The temperature of the metal during pouring of the specimens shall be not lower than that during pouring of the castings.3.5 H
20、eat TreatmentCastings and separately-cast tensile specimens shall be solution and precipitation heat treated in accordance with AMS2768. At least one set of tensile specimens shall, during each stage of heat treatment, be put into a batch-type furnace with each load of castings or into a continuous
21、furnace at intervals of not longer than three hours.3.6 PropertiesCastings and separately-cast tensile specimens produced in accordance with 3.4.2 shall conform to the following requirements:3.6.1 Tensile PropertiesShall be as follows, determined in accordance with ASTM B 557; conformance to the req
22、uirements of 3.6.1.1 shall be used as basis for acceptance of castings except when purchaser specifies that the requirements of 3.6.1.2 apply.3.6.1.1 Separately-Cast SpecimensShall meet the requirements shown in Table 2.TABLE 2 - MINIMUM TENSILE PROPERTIESProperty ValueTensile Strength 34.0 ksi (234
23、 MPa)Yield Strength at 0.2% Offset 18.0 ksi (124 MPa)Elongation in 2 inches or 4D 1.0%3.6.1.2 Specimens Cut from Castings or from Integrally-Cast CouponsSpecimens as in 4.3.4 shall meet the requirements of Table 3.TABLE 3 - MINIMUM TENSILE PROPERTIESProperty ValueTensile Strength 17.0 ksi (117 MPa)Y
24、ield Strength at 0.2% Offset 13.5 ksi ( 93 MPa)SAE INTERNATIONAL AMS4484L Page 4 of 73.6.1.3 When properties other than those specified in Table 3 are required, tensile specimens as in 4.3.4 taken from locations indicated on the drawing, from a casting or castings chosen at random to represent the l
25、ot, shall have the properties indicated on the drawing for such specimens. Property requirements for such specimens may bedesignated in accordance with AMS2360.3.7 Quality3.7.1 Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and f
26、rom imperfections detrimental to usage of the castings.3.7.1.1 Castings shall have smooth surfaces and shall be sufficiently cleaned to permit fluorescent penetrant inspection.3.7.1.2 Castings cleaned by blasting shall be pickled in a sulfuric or sulfuric-nitric acid solution to remove not less than
27、 0.002 inch (0.05 mm) of metal prior to protective treatment as in 5.2.3.7.2 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of castings in accordance with ASTM E 1742/E 1742M, or other radiographic procedure acceptable to purchaser, unti
28、l proper foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and of production castings as necessary to ensure maintenance of satisfactory quality.3.7.3 When specified, castings shall be subjected to fluorescent penetrant inspe
29、ction in accordance with ASTM E 1417/E 1417M.3.7.4 Fluorescent penetrant and other quality standards shall be as established by purchaser. Unless otherwise specified, radiographic acceptance standards shall meet the requirements of AMS2175, Grade D.3.7.5 Castings shall not be peened, plugged, impreg
30、nated, or welded unless authorized by the purchaser.3.7.5.1 When authorized by purchaser, welding in accordance with AMS2694 or other welding program approved by the purchaser may be used.3.7.6 Castings shall not be impregnated, chemically treated, or coated to prevent leakage unless specified or al
31、lowed by written permission of purchaser designating the method to be used.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of castings shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the righ
32、t to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsExcept as specified in 4.2.1.1, tests for composition (3.1), tensile properties (3.6.1), and quality (3.7) are acceptanc
33、e tests and shall be performed to represent each melt or lot as applicable.4.2.1.1 Tensile properties of specimens cut from castings or from integrally-cast coupons shall be determined only when specified by purchaser or when separately-cast specimens are not available. Tensile properties of separat
34、ely-cast specimens need not be determined when tensile properties of specimens cut from castings or from integrally-cast coupons are determined.SAE INTERNATIONAL AMS4484L Page 5 of 74.2.2 Preproduction Tests4.2.3 Tests for all technical requirements are preproduction tests and shall be performed pri
35、or to or on the first-article shipment of a casting to a purchaser, when a change in material and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.3 Sampling and TestingShall be in accordance with the following:4.3.1 At least one chemical
36、analysis specimen in accordance with 3.4.1 and ASTM B 953 from each melt for conformance to 3.1.4.3.2 One or more separately-cast tensile specimen in accordance with 3.4.2 representing each lot, except when properties of specimens cut from castings or from integrally cast coupons are required.4.3.3
37、Two preproduction castings in accordance with 4.4.1 of each part number.4.3.4 Except as permitted by 4.3.4.1, one or more castings from each lot when properties of specimens machined from castings are required. Specimens shall conform to ASTM B 557 and shall be either 0.500 inch (12.70 mm) diameter
38、at the reduced parallel gage section, subsize specimens proportional to the standard, or standard sheet-type specimens. For determining conformance to the requirements of 3.6.1.2, if specimen locations are not shown on the drawing, not less than two tensile specimens, one from the thickest section a
39、nd one from the thinnest section, shall be cut from a casting or castings from each lot.4.3.4.1 When permitted by purchaser, tensile specimens conforming to ASTM B 557, excised from integrally cast coupons may be used in lieu of separately-cast specimens (4.3.2) or specimens cut from a casting or ca
40、stings (4.3.4). Size, number, and location of integrally cast coupons shall be as specified by purchaser.4.4 Approval4.4.1 Sample castings from new or reworked molds and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approval is waiv
41、ed by purchaser.4.4.2 Vendor shall establish, for production of sample castings of each part number, parameters for the process control factors that will produce acceptable castings; these shall constitute the approved casting procedure and shall be used for producing production castings. If necessa
42、ry to make any change in parameters for the process control factors, vendor shall submit for reapproval a statement of the proposed changes in processing and, when requested, test specimens, sample castings, or both. Production castings incorporating the revised operations shall not be shipped prior
43、 to receipt of reapproval.4.4.2.1 Process control factors for producing castings include, but are not limited to, the following:Type of furnaceFurnace atmosphereLadle addition or grain refining practiceFluxing or oxide removal procedureGating and risering practicesMetal pouring temperature; variatio
44、n of 50 F (28 C) from established limit is permissibleSolidification and cooling proceduresSolution and precipitation heat treatment cyclesCleaning operationsMethods of inspection4.4.2.1.1 Any of the above process control factors for which parameters are considered proprietary by the vendor may be a
45、ssigned a code designation. Each variation in such parameters shall be assigned a modified code designation.SAE INTERNATIONAL AMS4484L Page 6 of 74.5 ReportsThe vendor of castings shall furnish with each shipment a report showing the results of tests for composition of at least one casting or of sep
46、arately-cast specimens from each melt and for tensile properties of separately-cast specimens representing each lot or of specimens cut from castings or from integrally cast coupons from each lot, and stating that the castings conform to the other technical requirements. This report shall include th
47、e purchase order number, lot number, AMS4484L, part number, and quantity.4.6 Resampling and RetestingIf any specimen used in the above tests fails to meet the specified requirements, disposition of the castings may be based on the results of testing two additional specimens for each original nonconf
48、orming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the castings represented. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY5.1 IdentificationShall be in accordance with AMS2804.5.1.1 Impregnated castings shall be mar
49、ked “IMP“.5.2 Protective TreatmentPrior to shipment, castings shall be coated with a light corrosion-inhibiting oil, unless chrome pickling in accordance with AMS2475 is required by the purchaser.5.3 PackagingCastings shall be prepared for shipment in accordance with ASTM B 660 in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the castings to ensure carrier acceptan
