1、AEROSPACEMATERIAL SPECIFICATIONAMS4286 REV. FIssued 1954-11Revised 2009-07Reaffirmed 2015-03Superseding AMS4286EAluminum Alloy Castings, Permanent Mold7.0Si - 0.32Mg (356.0-T51)As-Cast then Precipitation Heat TreatedUNS A03560RATIONALEAMS4286F has been reaffirmed to comply with the SAE five-year rev
2、iew policy._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 ari
3、sing therefrom, 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 2015 SAE InternationalAll rights reserved. No part of
4、 this publication 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: +1 724-77
5、6-4970 (outside 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/AMS4286F 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form
6、 of permanent mold castings. 1.2 Application These castings have been used typically for components requiring moderate strength up to 450 F (230 C), but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order
7、 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 cancelled and no superseding document has been specified, the last published issue of
8、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. AMS2175 Casting, Classification and Inspection of AMS2360 Room Temperature Tensil
9、e Properties of Castings AMS2694 Repair Welding of Aerospace Castings AMS2771 Heat Treatment of Aluminum Alloy Castings AMS2804 Identification, Castings AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA
10、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 Products (Metric) ASTM E 29 Using Significant Digits in Test Data to Determine Conformance with Spe
11、cifications ASTM E 34 Chemical Analysis of Aluminum- and Aluminum-Base Alloys ASTM E 607 Atomic 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 12
12、51 Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry ASTM E 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordanc
13、e with ASTM E 34, by spectrochemical methods in accordance with ASTM E 607, or ASTM E 1251, or by other analytical methods acceptable to purchaser (See 3.4.1). TABLE 1 - COMPOSITION Element min max Silicon 6.5 7.5 Iron - 0.6 Copper - 0.25 Manganese - 0.35 Magnesium 0.20 0.45 Zinc - 0.35 Titanium - 0
14、.25 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.1.1 Test results may be rounded by the “rounding off“ method of ASTM E 29. 3.2 Condition As-cast then precipitation heat treated to the T51 condition (See AS1990). 3.3 Castings Castings shall be produced from metal con
15、forming to 3.1, determined by analysis of a specimen (3.4.1) cast after the last melt addition. 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
16、 tested to qualify the melt lot as in 3.1. Spectrochemical sample shall be prepared in accordance with ASTM E 716. SAE INTERNATIONAL AMS4286F Page 2 of 7_ 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 55
17、7 or ASTM B 557M shall be cast from each melt after the last melt addition. Specimens shall be cast in molds representing the mold used for castings. 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 shal
18、l be processed with each heat treat lot and tested for conformance to 3.6.1. 3.4.2.2 When purchaser specifies specimens cut from a casting or from integrally-cast coupons, such specimens shall be removed after heat treatment, shall conform to ASTM B 557 or ASTM B 557M, and shall be either 0.500 inch
19、 (12.70 mm) diameter at the reduced parallel gage section, subsize specimens proportional to the standard, or standard sheet-type specimens, as required by 3.6.1. 3.5 Heat Treatment Shall be in accordance with AMS2771. Unless specimens cut from a casting are specified, one or more sets of separately
20、-cast tensile specimens shall 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 Properties Castings and separately-cast tensile specimens shall conform to the following requirements: 3.6.1 Tensile Properties Shal
21、l be as follows, determined in accordance with ASTM B 557 or ASTM B 557M; 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 3.6.1.2 apply: 3.6.1.1 Separately-Cast Specimens Specimens as in 4.3.2 s
22、hall have the properties shown in Table 2. TABLE 2 - MINIMUM TENSILE PROPERTIES FOR SEPARATELY-CAST SPECIMENS Property Value Tensile Strength 25.0 ksi (170 Mpa) 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
23、FOR SPECIMENS CUT FROM CASTINGS Property Value Tensile Strength 18.8 ksi (130 Mpa) 3.6.1.2.1 When properties other than those of 3.6.1.2 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 lot, shall
24、have the properties indicated on the drawing for such specimens. Property requirements may be designated in accordance with AMS2360. 3.7 Quality Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to
25、 usage of the castings. SAE INTERNATIONAL AMS4286F Page 3 of 7_ 3.7.1 When acceptance standards are not specified, Grade C of AMS2175 shall apply (See 8.5). 3.7.2 Methods of inspection and frequency of inspection shall be as agreed upon by purchaser and vendor. A “Casting Class“ of AMS2175 may be se
26、lected to specify 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. U
27、nless otherwise 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 examination shall be conducted in accordance with ASTM E 1742, unless ot
28、herwise specified by purchaser. 3.7.5 When specified by purchaser, castings shall be fluorescent penetrant tested 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 authorize
29、d by purchaser. 3.7.6.1 When authorized by purchaser, welding in accordance with AMS2694 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 respon
30、sible for 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, compositi
31、on (3.1), 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
32、 separately-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
33、 periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are preproduction tests and shall be performed on the first-article shipment of a casting to a purchaser, when a cha
34、nge 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 from each melt for conformance
35、to 3.1. SAE INTERNATIONAL AMS4286F Page 4 of 7_ 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 pa
36、rt number. 4.3.4 One or more castings from each heat treat lot when properties are required from specimens cut from castings. For determining conformance to the requirements of 3.6.1.2.1, if specimen locations are not shown on the drawing, two specimens from the thickest section and two specimens fr
37、om the thinnest section, shall be cut from a casting or castings from each heat treat lot. 4.3.4.1 When permitted by purchaser, tensile specimens conforming to ASTM B 557 or ASTM B 557M excised from integrally-cast coupons may be used in lieu of separately-cast specimens (4.3.2) or specimens cut fro
38、m a casting or castings (4.3.4). Size, number, and location of integrally-cast coupons shall be as specified by purchaser. 4.4 Approval 4.4.1 When sample castings are produced from new or reworked tooling (i.e. patterns, molds dies, etc.), the casting procedure and sample castings, when specified, s
39、hall 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 castings of each part number, parameters for the process control factors which will produce acceptable castings; these sh
40、all constitute the approved casting procedure and shall be used for producing production castings. Vendor shall also establish 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 product
41、ion of separately-cast tensile specimens shall be consistent for all cast material. If necessary 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
42、, or both. Production castings incorporating the revised operations shall not be shipped prior to receipt of reapproval. 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
43、 control limits, as applicable. Control factors for separately-cast tensile specimens must generally represent, but need not be identical to, those factors used for castings: Type of furnace Alloy additions, fluxing, deoxidation, and gas removal procedures Gating and risering practices Mold composit
44、ion and molding practice Core composition and fabrication method, when applicable Metal pouring temperature; 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
45、Cleaning operations Method of inspection Radiographic inspection sampling plan, if used. 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
46、 code designation. 4.5 Reports The vendor of castings shall furnish with each shipment a report showing the results of tests for composition of each melt, the results of tests for tensile properties of separately-cast specimens representing each heat treat lot or of specimens cut from castings from
47、each heat treat lot, and stating that the castings conform to the other technical requirements. This report shall include the purchase order number, melt and heat treat lot numbers, AMS4286F, precipitation heat treatment used, part number, and quantity. SAE INTERNATIONAL AMS4286F Page 5 of 7_ 4.6 Re
48、sampling and Retesting If any specimen used in the above tests fails to meet specified requirements, disposition of the castings 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 re
