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 2011 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/AMS4212KAEROSPACEMATERIALSPECIFICATIONAMS4212 REV. K Issued 1940-10 Revised 2011-02Supersedin
5、g AMS4212J Aluminum Alloy Castings 5.0Si - 1.2Cu - 0.50Mg (355.0-T6) Solution and Precipitation Heat Treated (Composition similar to UNS A03550) RATIONALE AMS4212K revises acceptance tests (4.2.1) and sampling and testing (4.3.5), and results from a Five Year Review and update of this specification.
6、 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of castings. 1.2 Application These castings have been used typically for components requiring high strength at room and elevated temperatures, 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.AMS2360 Room
9、Temperature Tensile Properties of Castings AMS2694 In-Process Welding of Castings AMS2771 Heat Treatment of Aluminum Alloy Castings AMS2804 Identification, Castings AMS-STD-2175 Castings, Classification and Inspection of AS1990 Aluminum Alloy Tempers Copyright SAE International Provided by IHS under
10、 license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4212K Page 2 of 82.2 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 Tens
11、ion Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products ASTM B 557M Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric) ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM E 10 Brinell Hardness of Metallic Materials ASTM E 18 Rockwell Hardnes
12、s of Metallic Materials ASTM E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications ASTM E 34 Chemical Analysis of Aluminum and Aluminum-Base Alloys ASTM E 607 AtomicEmission Spectrometric Analysis of Aluminum and Aluminum Alloys by the Point-to-Plane Te
13、chnique, Nitrogen Atmosphere ASTM E 716 Sampling of Aluminum and Its 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 Compos
14、ition 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, ASTM E 1251, or by other analytical methods acceptable to purchaser (See 3.3.1.1). TABLE 1 - COMPOSITION Eleme
15、nt min max SiliconIron (3.1.1) Copper Manganese (3.1.1) Magnesium Chromium ZincTitanium Other Elements, each Other Elements, total Aluminum 4.5- 1.0- 0.40 - - - - - remainder 5.50.61.50.50 0.60.25 0.35 0.25 0.05 0.15 Copyright SAE International Provided by IHS under license with SAENot for ResaleNo
16、reproduction or networking permitted without license from IHS-,-,-SAE AMS4212K Page 3 of 83.1.1 If iron content exceeds 0.45%, manganese content shall be not less than one-half of the iron content. 3.1.2 Test results may be rounded in accordance with the “rounding off” method of ASTM E 29. 3.2 Condi
17、tion Solution and precipitation heat treated to the T6 temper (See AS1990). 3.3 Cast Test Specimens 3.3.1 Chemical analysis specimens and tensile specimens shall be cast as follows: 3.3.1.1 Chemical Analysis Specimen Shall be cast from each melt after the last melt addition and shall be tested to qu
18、alify the melt lot as in 3.1. Spectrochemical sample shall be prepared in accordance with ASTM E 716. 3.3.2 Tensile Specimens Shall be produced as follows: 3.3.2.1 Specimens Cut from a Casting and Specimens from Integrally Cast Coupons Shall be removed after heat treatment, shall conform to ASTM B 5
19、57 or ASTM B 557M and shall be either 0.500 inch (12.70 mm) diameter at the reduced parallel gage section, standard sheet type specimens, or subsize specimens proportional to the standard. 3.3.2.2 Separately Cast Specimens Shall conform to ASTM B 557 or ASTM B 557M and shall be cast from each melt a
20、fter the last melt additions. 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 tre
21、at lot and tested for conformance to 3.5.1. 3.4 Heat Treatment Castings and representative tensile specimens (3.3.2) shall be solution and precipitation heat treated in accordance with AMS2771 except that set temperature and soak time shall be 300 to 320 F (149 to 160 C) for 1 to 6 hours. Unless spe
22、cimens cut from a casting or integrally-cast coupons are specified, separately-cast tensile specimens shall be put into a batch-type furnace with each load of castings or into a continuous furnace at intervals not longer than 3 hours. 3.5 Properties Castings, integrally-cast coupons, and separately
23、cast tensile specimens shall conform to the following requirements: 3.5.1 Tensile Properties Shall be as follows, determined in accordance with ASTM B 557 or ASTM B 557M; conformance to the requirements of 3.5.1.1 shall be used as basis for acceptance of castings except when purchaser specifies that
24、 requirements of 3.5.1.2 or 3.5.1.3 apply: 3.5.1.1 Separately-Cast Specimens Shall have the properties shown in Table 2. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4212K Page 4 of 8TABLE
25、2 - MINIMUM TENSILE PROPERTIES Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation in 4D 32.0 ksi (221 MPa) 20.0 ksi (138 MPa) 2.0% 3.5.1.2 Specimens Cut from Castings or from Integrally-Cast Coupons Specimens cut from castings (See 3.3.2.1) or from integrally-cast coupons, as s
26、pecified, shall have the properties shown in Table 3. TABLE 3 - MINIMUM TENSILE PROPERTIES Property Value Tensile Strength Yield Strength at 0.2% Offset Elongation in 4D 24.0 ksi (165 MPa) 15.0 ksi (103 MPa) 0.5% 3.5.1.3 Specimens Cut from Designated Casting Areas When specified by purchaser, specim
27、ens taken from locations indicated on the drawing, shall meet tensile property requirements specified on the drawing. Property requirements may be designated in accordance with AMS2360. 3.6 Quality Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from fo
28、reign materials and from imperfections detrimental to usage of the castings. 3.6.1 When acceptance standards are not specified, Grade C of AMS-STD-2175 shall apply. 3.6.2 Methods of inspection and frequency of inspection shall be as agreed upon by purchaser and vendor. A “Casting Class” of AMS-STD-2
29、175 may be selected to specify the method and frequency of inspection. 3.6.3 Castings shall be produced under radiographic control. This control shall consist of 100% radiographic inspection of castings until process control factors (4.4.2) have been established to ensure production of acceptable ca
30、stings. Unless 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. 3.6.3.1 Radiographic inspection shall be conducted in accordance with ASTM E 1742,
31、 unless otherwise specified by purchaser. 3.6.4 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. 3.6.5 Castings shall not be peened, plugged, impregnated, or welded unl
32、ess authorized by purchaser. 3.6.5.1 When authorized by purchaser, welding in accordance with AMS2694 or other welding program approved by purchaser may be used. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license fr
33、om IHS-,-,-SAE AMS4212K Page 5 of 84. 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 confirm
34、atory testing deemed necessary to ensure that the castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.5.1) and fluorescent penetrant inspection, when specified (3.6.4) are acceptance tests and shall be performed to r
35、epresent 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 properties of separately-cast specimens need not
36、 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 (3.6.3) following the establishment of process control (4.4.2) is a periodic test and shall be performed at a frequency selected by the
37、vendor unless frequency of testing is 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
38、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 3.3.1 from each melt for conformance to 3.1. 4.3.2 One or more preproduction castings in accordance with
39、 4.4.1 of each part number. 4.3.3 Not less than two tensile specimens machined from a casting or castings (See 3.5.1.2) from each heat treat lot except when purchaser specifies use of separately cast specimens as in 4.3.3.2 or integrally cast coupons as in 4.3.3.1. If the number and locations of spe
40、cimens are not shown on the drawing, not less than two specimens, one from the thickest section and one from the thinnest section, shall be cut from a casting or castings from each heat treat lot. 4.3.3.1 When permitted by purchaser, test bars integrally cast with the castings may be tested in lieu
41、of testing specimens cut from castings. Size, number, and location of integrally cast coupons shall be as specified on the casting drawing or as agreed upon by purchaser and vendor. 4.3.3.2 One or more separately cast tensile specimen in accordance with 3.3.2.2 representing each heat treat lot, exce
42、pt when purchaser specifies properties of specimens machined from castings or from integrally cast coupons. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4212K Page 6 of 84.3.4 One or more c
43、astings from each heat treat lot when properties are required from specimens cut from a casting. For determining conformance to the requirements of 3.5.1.2, if specimen locations are not shown on the drawing, two specimens from the thickest section and two specimens from the thinnest section, shall
44、be cut from a casting or castings from each heat treat lot. 4.3.5 When fluorescent penetrant inspection is specified (3.6.4), production castings shall be inspected at a frequency, and using acceptance criteria, defined by the purchaser. 4.4 Approval 4.4.1 Sample castings from new or reworked patter
45、ns 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 production of sample castings of each part number, parameters for the process control factors which will produce
46、 acceptable castings; these shall 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 o
47、f castings. 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, sample castings, test specimens, or both. Production castings incorporating the revised operations shal
48、l not be shipped prior to receipt of reapproval. 4.4.2.1 Control factors for producing castings and separately cast tensile specimens include, but are not limited to the following. Suppliers procedures shall identify tolerances, ranges and/or control limits as applicable. 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 Melt pouring temperature Solidification and cooling procedures Solution heat treat and precip
