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/AMS4424LAEROSPACE MATERIAL SPECIFICATIONAMS4424 REV. LIssued 1939-05Noncurrent 1992-08Reaf. N
5、onc. 2004-04Revised 2014-02Superseding AMS4424KMagnesium Alloy Castings, Sand6.0Al - 3.0Zn (AZ63-T6)Solution and Precipitation Heat Treated(Composition similar to UNS M11630)RATIONALEAMS4424L restores this document to active status and revises Composition (3.1), Chemical Analysis Specimens (3.4.1),
6、Heat Treatment (3.5), Tensile Properties (3.6.1), Quality (3.7), Acceptance Tests (4.2.1), Sampling (4.3) and Protective Treatment (5.2), and Packaging (5.3), removes hardness as a technical requirement and provides information on expected hardness in 8.3, and is a Five Year Review and update of thi
7、s specification.1. SCOPE1.1 FormThis specification covers a magnesium alloy in the form of sand castings.1.2 ApplicationPrimarily for parts operating in service up to 300 F (150 C).2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date of the purchase order forms a part of
8、 this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific 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 sh
9、all apply.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2360 Room Temperature Tensile Properties of CastingsAMS2475 Protective Treatments, Magnesium Allo
10、ysAMS2694 In-Process Welding of CastingsSAE INTERNATIONAL AMS4424L Page 2 of 7AMS2768 Heat Treatment of Magnesium Alloy CastingsAMS2804 Identification, Castings2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832
11、-9585, www.astm.org.ASTM B 557 Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy ProductsASTM B 953 Sampling Magnesium and Magnesium Alloys for Spectrochemical AnalysisASTM B 954 Analysis of Magnesium and Magnesium Alloys by Atomic Emission SpectrometryASTM B 660 Packaging/Packing of Al
12、uminum and Magnesium ProductsASTM E 155 Reference Radiographs for Inspection of Aluminum and Magnesium CastingsASTM E 1220 Visible Penetrant Testing Using Solvent-Removable ProcessASTM E 1417/E 1417M Liquid Penetrant TestingASTM E 1742/E 1742M Radiographic Examination3. TECHNICAL REQUIREMENTS3.1 Com
13、positionShall conform to the following percentages by weight, determined by spectrochemical methods methods in accordance with B 954 or by other analytical methods acceptable to purchaser:TABLE 1 - COMPOSITIONmin maxAluminumZincManganeseSiliconCopperNickelOther Impurities, total5.32.50.15-6.73.5-0.3
14、00.100.010.30Magnesium remainder3.2 ConditionSolution and precipitation heat treated.3.3 CastingsCastings shall be produced from metal conforming to 3.1. Metal remelted from previously analyzed ingot may be poured directly into castings. Furnace or ladle additions of grain-refining elements or alloy
15、s are permissible. If grain-refining elements or alloys are not added, the molten metal shall be subjected to superheating or other grain-refining treatment. Molten metal taken from alloying furnaces, with or without addition of foundry operating scrap (gate, sprues, risers, and rejected castings),
16、shall not be poured into castings unless first 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 AMS4424L Page 3 of 73.3.1 A melt shall be the metal withdrawn from a batch-furnace charge of 200
17、0 pounds (907 kg) or less as melted for pouring 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
18、 eight consecutive hours and solution and precipitation 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 requested, shall be supplied with the castings:3.4.1 Chemical Analysis SpecimensShall be c
19、ast from each melt after the last melt addition and 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 inches (12.70 mm) diameter at the reduced parallel gage section,
20、and shall be cast to size in molds made with the regular foundry mix of sand without using chills. Metal for the specimens shall be part of the metal which is used for the castings and shallbe subjected to the same grain-refining or alloying treatment given the metal for the castings. The temperatur
21、e of the metalduring pouring of the specimens shall be not lower than that during pouring of the castings.3.5 Heat TreatmentCastings and representative separately-cast tensile specimens shall be solution and precipitation heat treated in accordance with AMS2768; at least one set of tensile specimens
22、 shall, during each stage of heat treatment, be put into a batch-type furnace with each load of castings or into a continuous furnace at intervals of not longer than three hours.3.6 PropertiesCastings, integrally-cast coupons, and representative separately-cast tensile specimens produced in accordan
23、ce with 3.4.2shall conform to the following requirements:3.6.1 Tensile PropertiesShall be as follows, determined in accordance with ASTM B 557; conformance to the requirements of 3.6.1.1 shall be used as the basis for acceptance of castings except when purchaser specifies that the requirements of 3.
24、6.1.2 apply:3.6.1.1 Separately-Cast SpecimensTensile Strength, min 34 ksi (235 MPa)Yield Strength at 0.2% Offset, min 16 ksi (110 MPa)Elongation in 4D, min 3%3.6.1.2 Specimens Cut from Castings or from Integrally-Cast Coupons3.6.1.2.1 The average of not less than four, and preferably 10, specimens c
25、ut from thick and thin sections of a casting or castings shall be as follows; when permitted by purchaser, integrally-cast coupons may be used in lieu of specimens cut from castings and shall meet the following requirements:Tensile Strength, min 25 ksi (175 MPa)Yield Strength at 0.2% Offset, min 14
26、ksi (100 MPa)Elongation in 4D, min 0.75%3.6.1.2.2 Any specimen cut from a casting or from an integrally-cast coupon shall meet the following requirements:Tensile Strength, min 17 ksi (115 MPa)Yield Strength at 0.2% Offset, min 12 ksi ( 85 MPa)SAE INTERNATIONAL AMS4424L Page 4 of 73.6.1.2.3 When prop
27、erties other than those specified in 3.6.1.2.1 and 3.6.1.2.2 are required, tensile specimens as in 4.3.4, machined from locations indicated on the drawing from a casting or castings chosen at random to represent the lot or from integrally-cast coupons attached to such castings, shall have the proper
28、ties indicated on the drawing for such specimens. Property requirements may be designated 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 from imperfections detrimental to usage of t
29、he castings.3.7.1.1 Castings shall have smooth surfaces and shall be well cleaned.3.7.1.2 Castings cleaned by blasting shall be pickled in a sulfuric or sulfuric-nitric acid solution to remove not less than 0.002 inches (0.05 mm) of metal before protective treatment as in 5.2.3.7.2 Castings shall be
30、 produced under radiographic control. This control shall consist of radiographic examination of castings in accordance with ASTM E 1742/E 1742M until proper foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and of production
31、castings as necessary to ensure maintenance of satisfactory quality.3.7.3 When specified, castings shall be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417/E 1417M, to contrast dye penetrant inspection in accordance with ASTM E 1220, or to both.3.7.4 Radiographic, fluore
32、scent penetrant, contrast dye penetrant, and other quality standards shall be as agreed upon by purchaser and vendor. ASTM E 155 may be used to define radiographic acceptance standards.3.7.5 Castings shall not be repaired by peening, plugging, welding, or other methods without written permission fro
33、m purchaser.3.7.5.1 When permitted in writing by purchaser, defects in castings may be removed and the castings repaired by welding in accordance with AMS2694.3.7.6 Castings shall not be impregnated, chemically treated, or coated to prevent leakage unless specified or allowed by written permission o
34、f 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 performing all required tests.Results of such tests shall be reported to the purchaser as requ
35、ired by 4.5. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to the requirements of thisspecification.4.2 Classification of Tests4.2.1 Acceptance TestsExcept as specified in 4.2.1.1, tests to determine conformance to
36、 requirements for composition (3.1), tensile properties (3.6.1.1), and quality (3.7) are classified as acceptance 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 onl
37、y when specified by purchaser or when separately-cast specimens are not available. Tensile properties of separately-cast specimens need not be determined when tensile properties of specimens cut from castings or from integrally-cast coupons are determined.SAE INTERNATIONAL AMS4424L Page 5 of 74.2.2
38、Preproduction TestsTests to determine conformance to all technical requirements of this specification are classified as preproduction tests and shall be performed prior to or on the first-article shipment of a casting to a purchaser, when a change in material, processing, or both requires reapproval
39、 as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.3 SamplingShall be in accordance with the following:4.3.1 Two chemical analysis specimens in accordance with 3.4.1 and ASTM B 953 from each melt for conformance to 3.1.4.3.2 One separately-cast tensile specimen in accordanc
40、e with 3.4.2 from each lot except when purchaser requires properties of specimens cut from castings or from integrally-cast coupons.4.3.3 Two preproduction castings in accordance with 4.4.1 of each part number.4.3.4 One or more castings from each lot when properties of specimens machined from castin
41、gs are required or, when permitted by purchaser, four or more integrally-cast coupons. Specimens shall conform to ASTM B 557 and shall be either 0.500 inches (12.70 mm) diameter at the reduced parallel gage section, subsize specimens proportional to the standard, or standard sheet-type specimens. Fo
42、r determining conformance to the requirements of 3.6.1.2.3, if specimen locations are not shown on the drawing, not less than four tensile specimens, two from the thickest section and two from the thinnest section, shall be cut from a casting or castings from each lot or from integrally-cast coupons
43、 attached to such castings.4.4 Approval4.4.1 Sample castings from new or reworked patterns and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approval be waived by purchaser.4.4.2 Vendor shall establish for production of sample casti
44、ngs of each part number parameters for the process control factors which will produce acceptable castings; these shall constitute the approved casting procedure and shall be used for producing production castings. If necessary to make any change in parameters for the process control factors, vendor
45、shall submit for reapproval a statement of the proposed changes in processing and, when requested, separately-cast tensile specimens, sample castings, or both. Production castings incorporating the revised operations shall not be shipped prior to receipt of reapproval.4.4.2.1 Control factors for pro
46、ducing castings include, but are not limited to, the following:Type of furnaceFurnace atmosphereGating and risering practicesFluxing or deoxidation procedureMetal pouring temperature; variation of 50 F (30 C) from the established limit is permissibleSolidification and cooling proceduresSolution and
47、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 assigned a code designation. Each variation in such parameters shall be assigned a modified code designat
48、ion.SAE INTERNATIONAL AMS4424L Page 6 of 74.5 Reports4.5.1 The vendor of castings shall furnish with each shipment a report showing the results of tests for chemical composition of at least one casting or of separately-cast specimens from each melt, the results of tests for tensile properties of sep
49、arately-cast specimens representing each lot or of specimens cut from castings or from integrally-cast coupons from each lot, and for hardness of castings from each lot, and stating that the castings conform to the other technical requirements of this specification. This report shall include the purchase order number, lot number, AMS4424L, part number, and quantity.4.5.2 The vendor of finished or semi-finished parts shall furni
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