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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication ma
3、y 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 (outside US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS4261FAEROSPACEMATERIALSPECIFICATIONAMS4261 REV. F Issued 1964-06 Revised 2009-12 Superseding
5、 AMS4261E Aluminum Alloy Castings, Investment 7.0Si - 0.32Mg (356.0-T51) Precipitation Heat Treated (Composition similar to UNS A03560) RATIONALEAMS4261F revises referenced documents, tensile specimen requirements (3.4.2.2) and results from a Five Year Review and update of this specification. 1. SCO
6、PE 1.1 Form This specification covers an aluminum alloy in the form of investment castings. 1.2 Application These castings have been used typically for components requiring low weight, moderate strength and soundness, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue o
7、f 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 and no
8、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. AMS2175 Cast
9、ing, Classification and Inspection of AMS2360 Room Temperature Tensile Properties of Castings AMS2694 Repair Welding of Aerospace Castings AMS2771 Heat Treatment of Aluminum Alloy Castings AMS2804 Identification, Castings Copyright SAE International Provided by IHS under license with SAENot for Resa
10、leNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4261F Page 2 of 72.2 ASTM Publications 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
11、 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 Specifications ASTM E 34 Chemical Analysis of Aluminum- and Aluminum-Base Alloys ASTM E 6
12、07 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 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 3. TECHNICAL REQUIREM
13、ENTS 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 methods in accordance with ASTM E 607, or by other analytical methods acceptable to purchaser (See 3.4.1). TABLE 1 - COMPOSITION Eleme
14、nt min max Silicon 6.5 7.5 Magnesium 0.20 0.45 Iron - 0.6 Manganese - 0.35 Zinc - 0.35 Copper - 0.25 Titanium - 0.25 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 Precipitation he
15、at treated from the as-cast condition. 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. 3.4 Cast Test Specimens Chemical analysis specimens and tensile specimens shall be cast as follows: 3.4.1 Chemi
16、cal 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 shall be prepared in accordance with ASTM E 716. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduct
17、ion or networking permitted without license from IHS-,-,-SAE AMS4261F Page 3 of 73.4.2 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
18、. Specimens shall be cast in molds representing the mold formulation 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 tested for conform
19、ance to 3.6.1. 3.4.2.2 When purchaser specifies integrally cast specimens or specimens cut from a casting, such specimens shall conform to ASTM B 557 or ASTM B 557M, and shall be either round or rectangular, of standard size or subsize proportional to the standard, heat treated with the castings rep
20、resented, and tested for conformance to 3.6.1. 3.5 Heat Treatment Shall be in accordance with AMS2771. Unless specimens cut from a casting are specified, one or more separately-cast tensile specimens shall, during each stage of heat treatment, be put into a batch-type furnace with each load of casti
21、ngs 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 Properties Shall be as follows, determined in accordance with ASTM B 557 or AS
22、TM 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 Shall have the properties shown in Table 2. TABLE 2 - MINIMUM TENSILE PROPERTIES
23、 Property Value Tensile Strength 23.0 ksi (159 MPa)Yield Strength at 0.2% Offset 16.0 ksi (110 MPa)Elongation in 4D 3% 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 Property Value Tensile Strength 17.5 ksi (
24、121 MPa) Yield Strength at 0.2% Offset 12.0 ksi ( 83 MPa) Elongation in 4D 1% 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 have
25、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 usag
26、e of the castings. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4261F Page 4 of 73.7.1 When acceptance standards are not specified, Grade C of AMS2175 shall apply. 3.7.2 Methods of inspecti
27、on and frequency of inspection shall be as agreed upon by purchaser and vendor. A “Casting Class“ of AMS2175 may be selected 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 c
28、astings 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 determined by the vendor to ensure continued mainte
29、nance 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 tested using a method specified by purchaser, or, if not specified, a method
30、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, castings may be repaired by welding in accordance with AMS2694 or other welding program approved by purchaser. 4. QUALITY ASSURANC
31、E 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 necessary to ensure that the cast
32、ings 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), 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
33、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 properties of separately-cast specimens need not be determined when tensile prope
34、rties 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 performed at a frequency selected by the vendor unless frequency of testin
35、g 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 processing requires reapproval as in 4.4.2, and when purchaser deems confirmato
36、ry 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. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or netwo
37、rking permitted without license from IHS-,-,-SAE AMS4261F Page 5 of 74.3.2 A tensile specimen in accordance with 3.4.2 from each heat treat lot, except when purchaser specifies use of 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
38、part number. 4.3.4 One or more castings from each heat treat lot when properties are required from specimens machined 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 specim
39、ens from 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 c
40、ut from 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 Sample castings from new or reworked tooling (i.e. patterns, molds, dies, etc) and the casting procedure shall be approved by purchaser before castings f
41、or 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 shall constitute the approved casting procedure an
42、d shall be used for producing production castings. Vendor shall also establish a procedure for production of separately-cast tensile specimens. Method for production of separately-cast tensile specimens shall be consistent for all cast material. If necessary to make any change in parameters for the
43、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.4.4.2.1 Control fa
44、ctors 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 need not be identical t
45、o, 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 temperature; variation o
46、f 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 Radiographic inspection sampling plan, if used 4.4.2.1.1 Any of the process co
47、ntrol 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.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networkin
48、g permitted without license from IHS-,-,-SAE AMS4261F Page 6 of 74.5 Reports The vendor of castings 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 from 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, AMS4261F, part number, and quantity. 4.6 Resampling and Rete
