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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication m
3、ay 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 U
4、SA) 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/AMS4291HAEROSPACEMATERIALSPECIFICATIONAMS4291 REV. H Issued 1943-10 Revised 2010-10Supersedin
5、g AMS4291G Aluminum Alloy, Die Castings 8.5Si - 3.5Cu (A380.0-F) As Cast (Composition similar to UNS A13800) RATIONALE AMS4291H revises permissible methods for determining composition (3.1), and results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification co
6、vers an aluminum alloy in the form of die castings. 1.2 Application These castings have been used typically for components of intricate shape, but not having thin sections, but usage is not limited to such applications. This alloy has good casting characteristics by cold-chamber die casting and fair
7、 resistance to corrosion. 2. APPLICABLE DOCUMENTS 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 speci
8、fied. When the referenced document has been cancelled 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 Can
9、ada) or 724-776-4970 (outside USA), www.sae.org.AMS2694 In-Process Welding of Castings AMS2804 Identification, Castings AS1990 Aluminum Alloy Tempers Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4291H Page 2 of 62.2 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 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specificati
11、ons ASTM E 34 Chemical Analysis of Aluminum and Aluminum-Base Alloys ASTM E 505 Reference Radiographs for Inspection of Aluminum and Magnesium Die Castings ASTM E 607 Atomic Emission Spectrometric Analysis of Aluminum Alloys by the Point-to-Plane Technique, Nitrogen Atmosphere ASTM E 716 Sampling of
12、 Aluminum and Aluminum Alloys for Spectrochemical Analysis ASTM E 1251 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 weig
13、ht 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 ASTM E 1251, or by other analytical methods acceptable to purchaser (See 3.4 and 8.2). TABLE 1 - COMPOSITION Element min max SiliconIronCopper Manganese
14、Magnesium Nickel ZincTinOther Elements, total Aluminum 7.5- 3.0- - - - - - remainder 9.51.34.00.50 0.10 0.50 3.00.35 0.50 3.1.1 Test results may be rounded in accordance with the “rounding off” method of ASTM E 29. Provided by IHSNot for ResaleNo reproduction or networking permitted without license
15、from IHS-,-,-SAE AMS4291H Page 3 of 63.2 Condition As cast (F temper) as defined in AS1990. 3.3 Castings Castings shall be produced from metal conforming to 3.1, determined by analysis of a specimen (3.4) cast after the last melt addition. 3.4 Chemical Analysis Specimen Shall be cast after the last
16、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. 3.5 Quality Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrim
17、ental to usage of the castings. 3.5.1 Radiographic, liquid penetrant, and other quality standards shall be as agreed upon by purchaser and vendor. When acceptance standards are not specified for radiographic inspection, the requirements of Table 2 shall apply, utilizing the reference radiographs of
18、ASTM E 505. TABLE 2 - DEFAULT RADIOGRAPHIC ACCEPTANCE STANDARDS USING ASTM E 505 Category of Discontinuity Maximum Acceptable Level of Discontinuity Section Thickness 1/8 inch (3.2 mm) Maximum Acceptable Level of Discontinuity Section Thickness 5/8 inch (15.9 mm) Category A (Porosity) Category B (Co
19、ld Fill) #2 #2 #2 #3 per 1/8 inch (3.2 mm) Reference Category C (Shrinkage) Category D (Foreign Material) N/ANot greater than reference standard for 1/8 inch (3.2 mm) Not greater than reference standard for 5/8 inch (15.9 mm) section thicknesses section thicknesses 3.5.2 Methods of inspection and fr
20、equency of inspection shall be as agreed upon by purchaser and vendor. A “Casting Classification” of AMS2175 may be selected to specify the method and frequency of inspection. 3.5.3 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic inspection of c
21、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
22、nance of internal quality. 3.5.3.1 Radiographic inspection shall be conducted in accordance with ASTM E 1742, unless otherwise specified by purchaser. 3.5.4 When specified by purchaser, castings shall be fluorescent penetrant tested using a method specified by purchaser, or, if not specified, a meth
23、od in accordance with ASTM E 1417. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4291H Page 4 of 63.5.5 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchaser. 3.5.5.1 When authorized by purchaser, weldi
24、ng 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 responsible for the performance of all required tests. Purchase
25、r 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 All technical requirements except radiographic inspection (3.5.3) are acceptance tests and shall b
26、e performed on each lot (See 4.2.2). 4.2.2 Periodic Tests Radiographic inspection (3.5.3) following establishment of process control (See 4.4.2) is a periodic test and shall be performed at a frequency determined by the vendor to ensure continued maintenance of internal quality, unless frequency is
27、specified by purchaser. 4.2.3 Preproduction Tests All technical requirements are 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 and/or processing requires reapproval as in 4.4.2, and when purchaser deems con
28、firmatory 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 from each melt for conformance to 3.1 unless another sampling frequency is agreed upon by purchaser and vendor. 4.3.2 One or more preproduction castings
29、 of each casting part number in accordance with 4.4.1. 4.4 Approval 4.4.1 Sample castings from new or reworked dies 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
30、 production of sample castings of each part number, parameters for process control factors which will produce acceptable castings and, when requested, sample castings and/or radiographic results; these shall constitute the approved casting procedure and shall be used for producing production casting
31、s. If necessary to make any change in parameters for process control factors, vendor shall submit for reapproval, a statement of the proposed change in processing and, when requested, sample casting. Production castings incorporating the revised operations shall not be shipped prior to receipt of re
32、approval. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4291H Page 5 of 64.4.2.1 Control factors for producing castings include, but are not limited to, the following: Type of furnace Furnace atmosphere Alloy additions, fluxing, deoxidation,
33、 and gas removal procedures Location and number of gates Location and number of knockout pins Mold temperature and tolerances Injection pressure and tolerances Metal injection temperature; variation of 50 F (28 C) from the established limit is permissible Solidification and cooling procedures Straig
34、htening procedure, when applicable Cleaning operations Methods 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 para
35、meters shall be assigned a modified 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 and stating that the castings conform to the other technical requirements of this specification. This report sh
36、all include the purchase order number, melt and lot numbers, AMS4291H, 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 castings may be based on the results of testing two additional specimens
37、 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 5.1 Identification Shall be in accordance with AMS2804. 5.1.1 Imp
38、regnated castings shall be marked IMP. 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.
39、6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Castings not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. Provided by IHS
40、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4291H Page 6 of 68. NOTES 8.1 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous is
41、sue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 The composition shown in 3.1 was pr
42、eviously shown as Composition 2. The former Composition 1 is no longer available. Castings having the composition shown in 3.1 shall be supplied whenever either Composition 1 or Composition 2 is specified on the drawing. 8.3 Terms used in AMS are clarified in ARP1917 and as follows: 8.3.1 Melt A sin
43、gle homogeneous batch of molten metal to which all melt additions and processing have been completed and from which castings are poured. 8.3.2 Melt Lot Castings poured from a single melt. 8.4 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary, dimensions and pr
44、operties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.5 Purchase documents should specify not less than the following: AMS4291H Part number or die number of castings desired Quantity of castings desir
45、ed. 8.6 Similar Specifications AMS-QQ-A-591, Alloy 380.0, is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. PREPARED BY AMS COMMITTEE “D” Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
