1、AEROSPACE MATERIAL SPECIFICATION AMS4260 REV. G Issued 1955-03 Revised 2008-06 Reaffirmed 2014-10 Superseding AMS4260F Aluminum Alloy, Investment Castings 1.0Si - 0.32Mg (356.0-T6) Solution and Precipitation Heat Treated (Composition similar to UNS A03560) RATIONALE AMS4260G has been reaffirmed to c
2、omply with the SAE five year review 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, inc
3、luding any patent infringement arising 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 2014 SAE Internat
4、ional All rights reserved. No part of 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
5、 (inside USA and Canada) Tel: +1 724-776-4970 (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/AMS4260G 1. SCOPE 1.1 Form This speci
6、fication covers an aluminum alloy in the form of castings. 1.2 Application These castings have been used typically for components requiring low weight, moderate strength and soundness, cast to approximately final dimensions, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The
7、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 cancelled
8、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. AMS 2
9、175 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 AMS4260G Page 2 of 7 2.2 ASTM Publications Avail
10、able 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 Product
11、s (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 Aluminum and
12、Aluminum Alloys by the Point-to-Plane Technique ASTM E 607 Atomic Emission Spectrometric Analysis of Aluminum Alloys by the Point-to-Plane Technique, Nitrogen Atmosphere ASTM E 716 Sampling Aluminum and Aluminum Alloys for Spectrochemical Analysis ASTM E 1251 Analysis of Aluminum and Aluminum Alloys
13、 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 accordance with ASTM E 34, by spectrochemical method
14、s in accordance with ASTM E 227, ASTM E 607 or ASTM E 1251, or by other analytical methods acceptable to purchaser (See 3.4.1). TABLE 1 - COMPOSITION Element min maxSilicon 6.5 7.5 Iron - 0.6 Copper - 0.25Manganese - 0.35Magnesium 0.20 0.45Zinc - 0.35Titanium - 0.25Other Elements, each - 0.05Other E
15、lements, total - 0.15Aluminum remainder 3.1.1 Test results may be rounded by the “rounding off“ method of ASTM E 29. 3.2 Condition Solution and precipitation heat treated. 3.3 Castings Castings shall be produced from metal conforming to 3.1, determined by analysis of a specimen (3.4.1) cast after th
16、e last melt addition. SAE INTERNATIONAL AMS4260G 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
17、in 3.1. Spectrochemical sample shall be prepared in accordance with ASTM E 716. 3.4.2 Tensile Specimens 3.4.2.1 Unless specimens cut from a casting or integrally-cast coupons are specified by purchaser, separately-cast specimens conforming to ASTM B 557 or ASTM B 557M shall be cast from each melt af
18、ter 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 shall be processed with each heat treat lot and test
19、ed 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 (12.70 mm) diameter at the reduced parallel gag
20、e 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 AMS 2771. Unless specimens cut from a casting are specified, one or more sets of separately-cast tensile specimens shall, during each stag
21、e of heat treatment, be put into a batch-type furnace with each load of castings or into a continuous furnace at intervals not longer than three hours. 3.6 Properties Castings, integrally-cast coupons, and separately-cast tensile specimens shall conform to the following requirements: 3.6.1 Tensile P
22、roperties Shall 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 basis for acceptance of castings except when purchaser specifies that 3.6.1.2 applies. 3.6.1.1 Separately-Cast Specimens and Integrally-Cast Coupons Spe
23、cimens as in 4.3.2 shall have the properties shown in Table 2. TABLE 2 - MINIMUM TENSILE PROPERTIES - SEPARATELY-CAST OR INTEGRALLY-CAST SPECIMEN Property Value Tensile Strength 33.0 ksi (228 MPa)Yield Strength at 0.2% Offset 22.0 ksi (152 MPa)Elongation in 4D 3% SAE INTERNATIONAL AMS4260G Page 4 of
24、 7 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 - SPECIMENS CUT FROM CASTINGS Property Value Tensile Strength 25.0 ksi (172 MPa) Yield Strength at 0.2% Offset 16.5 ksi (114 MPa) Elongation in 4D 1% 3.6.1.2.
25、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 have the properties indicated on the drawing for such specimens. Property requirements may
26、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 and from imperfections detrimental to usage of the castings. 3.7.1 When acceptance standards are not specified, Grade C of AMS
27、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 specify the method and frequency of inspection. 3.7.3 Castings shall be produced under radiographic control. This control shall
28、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 otherwise specified by purchaser, continued radiographic inspection of production castings shall be performed at a frequency determi
29、ned 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 specified by purchaser. 3.7.5 When specified by purchaser, castings shall be fluorescent penetrant inspected using a method specifi
30、ed 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 purchaser. 3.7.6.1 When authorized by purchaser, welding in accordance with AMS 2694 or other welding program approved by purchaser
31、 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 the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed
32、necessary to ensure that the castings conform to specified requirements. SAE INTERNATIONAL AMS4260G Page 5 of 7 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1), tensile properties of separately-cast specimens (3.6.1.1), and quality (3.7) are accep
33、tance 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 a casting or from integrally-cast coupons shall be determined when specified by purchaser or when separately-cast specimens are not available. Tensile propertie
34、s of separately-cast specimens need not be determined when tensile properties of specimens cut from a casting or from integrally-cast coupons are determined. 4.2.2 Periodic Tests Radiographic inspection (3.7.3) following the establishment of process control (4.4.2) is a periodic test and shall be pe
35、rformed 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 change in material and/or process
36、ing 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 One chemical analysis specimen in accordance with 3.4.1 from each melt for conformance to 3.1. 4.3.2 One or more separately-cas
37、t tensile specimens in accordance with 3.4.2 from each heat treat lot, except when purchaser specifies specimens cut from a casting or integrally-cast coupons 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 castings from each heat
38、 treat lot when properties are required from specimens cut from a casting. 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 cut from a casting
39、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 from a casting or castings (4.3.4). Size, number, and lo
40、cation of integrally-cast coupons shall be as specified by purchaser. 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
41、waived by purchaser. SAE INTERNATIONAL AMS4260G Page 6 of 7 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
42、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 production of separately-cast tensile specimens shall be consistent for
43、 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, or both. Production castings incorporating the revised operati
44、ons 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 control limits, as applicable. Control factors for separately-c
45、ast tensile specimens must generally represent, but need 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
46、 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 Cleaning operations Methods of inspection Rad
47、iographic inspection sampling plan, if used. 4.4.2.1.1 Any of the 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 casti
48、ngs shall furnish 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 or integrally-cast coupons from each heat treat lot
49、, 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, AMS 4260G, part number, and quantity. 4.6 Resampling 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 speci
