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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (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/AMS4218J AEROSPACE MATERIAL SPECIFICATION AMS4218 REV. J Issued 1961-01 Revised 2
5、010-01 Reaffirmed 2015-10 Superseding AMS4218H Aluminum Alloy Castings 7.0Si - 0.35Mg (A356.0-T6) (Formerly T6P Temper) Solution and Precipitation Heat Treated (Composition similar to UNS A13560) RATIONALE AMS4218J has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE 1.1 Form
6、 This specification covers an aluminum alloy in the form of sand, permanent mold, composite mold, and 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.
7、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 specified. When the referenced doc
8、ument 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 Canada) or 724-776-4970 (outside
9、 USA), www.sae.org. AMS2360 Room Temperature Tensile Properties of Castings AMS2694 In-Process Welding of Castings AMS2771 Heat Treatment of Aluminum Alloy Castings AMS2804 Identification, Castings AMS2175 Casting, Classification and Inspection of 2.2 ASTM Publications Available from ASTM Internatio
10、nal, 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 Products (Metric) ASTM B 660 P
11、ackaging/Packing of Aluminum and Magnesium Products ASTM E 10 Brinell Hardness of Metallic Materials 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 155 Reference Radiographs for Insp
12、ection of Aluminum and Magnesium Castings ASTM E 607 Atomic Emission Spectrometric Analysis 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 by Atomi
13、c Emission Spectrometry ASTM E 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 2.3 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps
14、.dla.mil/quicksearch/. FED-STD-141 Paint, Varnish, Lacquer and Related Materials, Methods of Inspection, Sampling and Testing 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight as shown in Table 1, determined by wet chemical methods in accordance with ASTM E 34, by
15、spectrochemical methods in accordance with ASTM E 607, 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 - 0.20 Copper - 0.20 Manganese - 0.10 Magnesium 0.25 0.45 Zinc - 0.10 Titanium - 0.20 Other Elements, each
16、 - 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 Solution and precipitation heat treated. SAE INTERNATIONAL AMS4218J Page 2 of 8_ 3.3 Castings Castings shall be produced from metal conforming to 3.1, de
17、termined 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 tested to qualify
18、 the melt as in 3.1. Spectrochemical sample shall be prepared in accordance with ASTM E 716. 3.4.2 Tensile Specimens Shall be produced as follows: 3.4.2.1 Specimens Cut from a Casting and Specimens Cut from Integrally-Cast Coupons Shall be removed after heat treatment, shall conform to ASTM B 557 or
19、 ASTM B 557M and shall be either 0.500 inch (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. 3.4.2.2 Separately-Cast Specimens Shall conform to ASTM B 557 or ASTM B 557M and shall be cast
20、 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. 3.5 Heat Treatment Heat treat to the T6 temper in ac
21、cordance with AMS2771. 3.6 Properties Castings, and representative tensile specimens produced in accordance with 3.4.2, shall conform to the following requirements: 3.6.1 Tensile Properties Shall be as follows, determined in accordance with ASTM B 557 or ASTM B 557M; conformance to the requirements
22、of 3.6.1.1 shall be used as basis for acceptance of castings except when purchaser specifies that the requirements of 3.6.1.2 or 3.6.1.3 apply: 3.6.1.1 Specimens Cut From All Areas of a Casting Specimens as in 4.3.3 shall have the properties as shown in Table 2. TABLE 2 - MINIMUM TENSILE PROPERTIES
23、Property Value Tensile Strength 32.0 ksi (221 MPa) Yield Strength at 0.2% Offset 22.0 ksi (152 MPa) Elongation in 4D 2% SAE INTERNATIONAL AMS4218J Page 3 of 8_ 3.6.1.1.1 When properties other than those of 3.6.1.1 are required, tensile specimens as in 4.3.3 taken from locations indicated on the draw
24、ing, 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 for such specimens may be designated in accordance with AMS2360. 3.6.1.2 Specimens Cut from Integrally-Cast Coupons Specimens as in 4.3.
25、3.1 shall have the properties as shown in Table 3. TABLE 3 - MINIMUM TENSILE PROPERTIES Properties Value Tensile Strength 32.0 ksi (221 MPa) Yield Strength at 0.2% Offset 22.0 ksi (152 MPa) Elongation in 4D 2% 3.6.1.3 Separately-Cast Specimens Specimens as in 4.3.3.2 shall have the properties as sho
26、wn in Table 4. TABLE 4 - MINIMUM TENSILE PROPERTIES Properties Value Tensile Strength 33.0 ksi (228 MPa) Yield Strength at 0.2% Offset 27.0 ksi (186 MPa) Elongation in 4D 3% 3.7 Quality Castings, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materi
27、als and from imperfections detrimental to usage of the castings. 3.7.1 When acceptance standards are not specified, Grade C of AMS2175 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 AMS2175 may be selected to
28、 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 (4.4.2) have been established to ensure production of acceptable castings. Unless otherwi
29、se 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. 3.7.3.1 Radiographic inspection shall be conducted in accordance with ASTM E 1742 unless otherwise speci
30、fied by purchaser. 3.7.4 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. 3.7.5 Castings shall not be peened, plugged, impregnated, or welded unless authorized by purchase
31、r. 3.7.5.1 When authorized by purchaser, welding in accordance with AMS2694 or other welding program approved by purchaser may be used. SAE INTERNATIONAL AMS4218J Page 4 of 8_ 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of castings shall supply all samples for vendor
32、s 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 castings conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Except as spec
33、ified in 4.2.1.1, composition (3.1), tensile properties of specimens cut from castings or, when specified, from integrally-cast coupons (3.6.1.2) or separately-cast specimens (3.6.1.3), and quality (3.7) are acceptance tests and shall be performed to represent each melt or heat treat lot as applicab
34、le. 4.2.1.1 Tensile properties of integrally-cast coupons or separately-cast specimens shall be determined only when specified by purchaser or when specimens cut from castings cannot be obtained. Tensile properties of integrally-cast coupons or separately-cast specimens need not be determined when t
35、ensile 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 periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by pur
36、chaser. 4.2.3 Preproduction Tests Tests for 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 confirmatory testing
37、 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 preproduction castings in accordance with 4.4.1 of each part number. 4.3.3 Not less than two ten
38、sile specimens shall be machined from a casting or heat treat lot except when purchaser specifies use of integrally-cast coupons as in 4.3.3.1 or separately-cast specimens as in 4.3.3.2. If the number and locations of specimens are not shown on the drawing, not less than two specimens, one from the
39、thickest section and one from the thinnest section, shall be cut from a casting or castings from each lot. 4.3.3.1 When permitted by purchaser, test bars integrally-cast with the castings may be tested in lieu of testing specimens cut from castings. Size, number, and location of integrally-cast coup
40、ons shall be as specified on the casting drawing or as agreed upon by purchaser and vendor. 4.3.3.2 One separately-cast tensile specimen representing each heat treat lot, except when properties of specimens machined from castings or from integrally-cast coupons are tested. SAE INTERNATIONAL AMS4218J
41、 Page 5 of 8_ 4.4 Approval 4.4.1 Sample castings from new or reworked patterns or molds 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 castin
42、gs 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 for producing production castings. Vendor shall also establish control factors for producing separately cast tensile spec
43、imens but these control factors need not be identical to those used for production of 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, te
44、st specimens, 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 castings and separately-cast tensile specimens include, but are not limited to, the following. Suppliers procedures shall identif
45、y tolerances, ranges and/or 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 Furnace atmosphere Alloy additions, fluxing, deoxidation, and gas removal procedure
46、s Gating and risering practice Mold composition and molding practice Core composition and fabrication method, when applicable Metal pouring temperature Solidification and cooling procedures Solution heat treat and stabilization cycles Straightening procedure, when applicable Cleaning operations Meth
47、ods 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 code designation. 4.5
48、Reports The vendor of castings shall furnish with each shipment a report showing the results of tests for chemical composition of each melt and the results of tests for tensile properties of specimens cut from castings from each heat treat lot or, when specified, tensile properties of separately or integrally cast specimens from each heat treat
