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 there
2、from, 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 2014 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4280J AEROSPACE MATERIAL SPECIFICATION AMS4280 REV. J Issued 1942-06 Revised 2
5、008-06 Reaffirmed 2014-05 Superseding AMS4280J Aluminum Alloy Castings, Permanent Mold 5.0Si - 1.2Cu - 0.5Mg (355.0-T71) Solution Heat Treated and Overaged (Composition similar to UNS A03550) RATIONALE This document has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 For
6、m This specification covers an aluminum alloy in the form of permanent mold castings. 1.2 Application These castings have been used typically for components requiring moderate strength and dimensional stability up to 300 F (149 C), but usage is not limited to such applications. 2. APPLICABLE DOCUMEN
7、TS The 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 specific document issue is specified. When the referenced document has been can
8、celled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available 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
9、. AMS 2175 Casting, Classification and Inspection of AMS 2360 Room Temperature Tensile Properties of Castings AMS 2694 Repair Welding of Aerospace Castings AMS 2771 Heat Treatment of Aluminum Alloy Castings AMS 2804 Identification, Castings SAE INTERNATIONAL AMS4280J Page 2 of 7 2.2 ASTM Publication
10、s Available 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 Magnesium-Alloy Products ASTM B 557M Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy
11、Products (Metric) ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 29 Using Significant Digits in Test Data to Determine Conformance with Specifications ASTM E 34 Chemical Analysis of Aluminum- and Aluminum-Base Alloys ASTM E 227 Optical Emission Spectrometric Analysis of Alumi
12、num and Aluminum Alloys by the Point-to-Plane Technique ASTM E 607 Optical Emission Spectrometric Analysis of Aluminum and Aluminum Alloys by the Point-to-Plane Technique, Nitrogen Atmosphere ASTM E 716 Sampling Aluminum and Aluminum Alloys for Spectrochemical Analysis ASTM E 1251 Optical Emission S
13、pectrometric Analysis of Aluminum and Aluminum Alloys by the Argon Atmosphere, Point-to-Plane, Unipolar Self-Initiating Capacitor Discharge ASTM E 1417 Liquid Penetrant Examination ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weig
14、ht shown in Table 1, determined by wet chemical methods in accordance with ASTM E 34, by spectrochemical methods in accordance with ASTM E 1251, ASTM E 227, or ASTM E 607, or ASTM 1251, or by other analytical methods acceptable to purchaser (See 3.4.1). TABLE 1 - COMPOSITION Element (3.1.1) min maxS
15、ilicon 4.5 5.5 Iron (3.1.2) - 0.6 Copper 1.0 1.5 Manganese (3.1.2) - 0.5 Magnesium 0.4 0.6 Chromium - 0.25Zinc - 0.35Titanium - 0.25Other Elements, each - 0.05Other Elements, total - 0.15Aluminum remainder 3.1.1 Test results may be rounded by the “rounding off“ method of ASTM E 29. 3.1.2 If iron con
16、tent exceeds 0.45, manganese content shall be not less than one-half the iron content. 3.2 Condition Solution heat treated and overaged. 3.3 Castings Castings shall be produced from metal conforming to 3.1, determined by analysis of a specimen (3.4.1) cast after the last melt addition. SAE INTERNATI
17、ONAL AMS4280J Page 3 of 7 3.4 Cast Test Specimens Chemical analysis specimens and tensile specimens shall be cast as follows: 3.4.1 Chemical Analysis Specimens Shall be cast from each melt after the last melt addition and shall be tested to qualify the melt lot as in 3.1. Spectrochemical sample shal
18、l be prepared in accordance with ASTM E 716. 3.4.2 Tensile Specimens 3.4.2.1 Unless specimens cut from a casting are specified by purchaser, separately-cast specimens conforming to ASTM B 557 or ASTM B 557M shall be cast from each melt after the last melt addition. Specimens shall be cast in permane
19、nt molds. Chills are not permitted on test specimen cavity except on the end face of the specimen when approved in accordance with 4.4.2. Tensile specimens shall be processed with each heat treat lot and tested for conformance to 3.6.1. 3.5 Heat Treatment Castings and separately-cast tensile specime
20、ns shall be solution heat treated and overaged to the T71 condition in accordance with AMS 2771. Unless specimens cut from a casting are specified, one or more sets of separately-cast specimens shall, during each stage of heat treatment, be put into a batch-type furnace with each load of castings or
21、 into a continuous furnace at intervals of not longer than three hours. 3.6 Properties Castings and separately-cast tensile specimens shall conform to the following requirements: 3.6.1 Tensile Properties Shall be as follows, determined in accordance with ASTM B 557 or ASTM B 557M; conformance to the
22、 requirements of 3.6.1.1 shall be used as the basis for acceptance of castings except when purchaser specifies that 3.6.1.2 applies: 3.6.1.1 Separately-Cast Specimens Specimens as in 4.3.2 shall have the properties shown in Table 2. TABLE 2 - MINIMUM TENSILE PROPERTIES FOR SEPARATELY-CAST SPECIMENS
23、Property Value Tensile Strength 34.0 ksi (234 MPa)Yield Strength at 0.2% Offset 27.0 ksi (186 MPa)Elongation in 4D 1% 3.6.1.2 Specimens Cut from Castings Specimens as in 4.3.4 shall have the properties shown in Table 3. TABLE 3 - MINIMUM TENSILE PROPERTIES FOR SPECIMENS CUT FROM CASTINGS Property Va
24、lue Tensile Strength 25.50 ksi (176 MPa) Yield Strength at 0.2% Offset 20.00 ksi (138 MPa) SAE INTERNATIONAL AMS4280J Page 4 of 7 3.6.1.2.1 When properties other than those of 3.6.1.2 are required, tensile specimens taken from locations indicated on the drawing, from a casting or castings chosen at
25、random to represent the lot, shall have the properties indicated on the drawing for such specimens. Property requirements may be designated in accordance with AMS 2360. 3.7 Quality Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials a
26、nd from imperfections detrimental to usage of the castings. 3.7.1 When acceptance standards are not specified, Grade C of AMS 2175 shall apply. 3.7.2 Methods of inspection and frequency of inspection shall be as agreed upon by purchaser and vendor. A “Casting Class“ of AMS 2175 may be selected to sp
27、ecify the method and frequency of inspection. 3.7.3 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic inspection of castings until process control factors (See 4.4.2) have been established to ensure production of acceptable castings. Unless otherw
28、ise specified by purchaser, continued radiographic inspection of production castings shall be performed at a frequency determined by the vendor to ensure continued maintenance of internal quality. 3.7.4 Radiographic inspection shall be conducted in accordance with ASTM E 1742, unless otherwise speci
29、fied by purchaser. 3.7.5 When specified by purchaser, castings shall be fluorescent penetrant inspected using a method specified by purchaser, or, if not specified, a method in accordance with ASTM E 1417. 3.7.6 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purch
30、aser. 3.7.6.1 When authorized by purchaser, welding in accordance with AMS 2694 or other welding program approved by purchaser may be used. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of castings shall supply all samples for vendors tests and shall be responsible for
31、 the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1),
32、 tensile properties of separately-cast specimens (3.6.1.1), and quality (3.7) are acceptance tests and shall be performed to represent each melt or heat treat lot as applicable. 4.2.1.1 Tensile properties of specimens cut from castings shall be determined when specified by purchaser or when separate
33、ly-cast specimens are not available. Tensile properties of separately-cast specimens need not be determined when tensile properties of specimens cut from castings are determined. 4.2.2 Periodic Tests Radiographic inspection (3.7.3) following the establishment of process control (4.4.2) is a periodic
34、 test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. SAE INTERNATIONAL AMS4280J Page 5 of 7 4.2.3 Preproduction Tests All technical requirements are preproduction tests and shall be performed on the first-article shipment of a cast
35、ing 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 Testing Shall be in accordance with the following: 4.3.1 At least one chemical analysis specimen in accordance with 3.4.1 f
36、rom each melt. 4.3.2 One or more separately-cast tensile specimens in accordance with 3.4.2 from each heat treat lot except when purchaser specifies specimens cut from a casting as in 4.3.4. 4.3.3 One or more preproduction castings in accordance with 4.4.1 of each part number. 4.3.4 One or more cast
37、ings from each heat treat lot when properties are required from specimens cut from castings. For determining conformance to the requirements of 3.6.1.2, if specimen locations are not shown on the drawing, two specimens from the thickest section and two specimens from the thinnest section, shall be c
38、ut from a casting or castings from each heat treat lot. 4.4 Approval 4.4.1 Sample castings from new or reworked tooling (i.e. patterns, molds, dies, etc.)and the casting procedure shall be approved by purchaser before castings for production use are supplied, unless such approval be waived by purcha
39、ser. 4.4.2 Vendor shall establish, for production of sample castings 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. Vendor shall also es
40、tablish control factors for producing separately cast tensile specimens, but these control factors need not be identical to those used for production of castings. Method for production of separately-cast tensile specimens shall be consistent for all cast material. If necessary to make any change in
41、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 to receipt of reapproval
42、. 4.4.2.1 Control factors for producing tensile specimens and castings include, but are not limited to, the following. Suppliers procedures shall identify tolerances, ranges, and/or control limits, as applicable. Control factors for separately-cast tensile specimens must generally represent, but nee
43、d not be identical to, those factors used for castings: Type of furnace Furnace atmosphere Alloy additions, fluxing, deoxidation, and gas removal procedures Gating and risering practices Mold composition and molding practice Core composition and fabrication method, when applicable Metal pouring temp
44、erature; variation of 50 F (28 C) from the established limit is permissible Solidification and cooling procedures Stabilization/precipitation heat treat cycle Straightening procedure, when applicable Cleaning operations Method of inspection Radiographic inspection sampling plan, if used. SAE INTERNA
45、TIONAL AMS4280J Page 6 of 7 4.4.2.1.1 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 designation. 4.5 Reports The vendor of castings shall f
46、urnish with each shipment a report showing the results of tests for composition of each melt and the results of tests for tensile properties of separately-cast specimens representing each heat treat lot or of specimens cut from a casting from each heat treat lot, and stating that the castings confor
47、m to the other technical requirements. This report shall include the purchase order number, melt and heat treat lot numbers, AMS 4280J, part number, and quantity. 4.6 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the casting
48、s may be based on the results of testing two additional specimens for each original nonconforming 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 DELIVERY
49、5.1 Identification Shall be in accordance with AMS 2804. 5.2 Packaging Castings shall be prepared for shipment in accordance with ASTM B 660 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the castings to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall include this specification number and its revision letter in all quotations and whe
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