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/AMS4417BAEROSPACEMATERIALSPECIFICATIONAMS4417 REV. B Issued 1989-10 Revised 2011-05Supersedin
5、g AMS4417A Castings, Sand, Magnesium Alloy 1.5Ag - 2.1Di - 0.08Cu - 0.70Zr (EQ21 - T6) Solution and Precipitation Heat Treated (Composition similar to UNS M18330) RATIONALE AMS4417B revises standards for chemical analysis (3.1), condition (3.2) and sampling for chemical analysis (4.3.1), and results
6、 from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a magnesium alloy in the form of sand castings. 1.2 Application These castings have been used typically for parts requiring retention of yield strength up to 400 F (204 C), but usage is not limited
7、 to such applications. 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 specifie
8、d. 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 Canada
9、) or 724-776-4970 (outside USA), www.sae.org.AMS2360 Room Temperature Tensile Properties of Castings AMS2361 Elevated Temperature Tensile Properties of Castings AMS2768 Heat Treatment of Magnesium Alloy Castings AMS2475 Protective Treatments, Magnesium Alloys SAE AMS4417B Page 2 of 8AMS2694 In-Proce
10、ss Welding of Castings AMS2750 Pyrometry AMS2804 Identification, Castings 2.2 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 Aluminum- and Magnesi
11、um-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 B 953 Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis ASTM B 954 Analysis of Magnesium and Magnesiu
12、m Alloys by Atomic Emission Spectrometry ASTM E 21 Elevated Temperature Tension Tests of Metallic Materials ASTM E 155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings ASTM E 1417 Liquid Penetrant Testing ASTM E 1742 Radiographic Examination 3. TECHNICAL REOUIREMENTS 3.1 Compo
13、sition Shall conform to the percentages by weight shown in Table 1, determined by wet chemical methods in accordance with ASTM B 954, by spectrochemical methods, or by other analytical methods acceptable to purchaser: TABLE 1 - COMPOSITION Element min max Didymium (Total Rare Earths) (3.1.1) 1.75 2.
14、5 Silver 1.3 1.7 Zirconium 0.40 1.0 Copper 0.05 0.10 Nickel - 0.01 Other Elements, total - 0.30 Magnesium remainder 3.1.1 Didymium consists of neodymium (not less than 70% of the total) plus praseodymium, along with lesser amounts of other rare earth elements. Vendor shall analyze and report neodymi
15、um and praesodymium in order to determine composition for routine acceptance. When analyzed, the total of all rare earth elements shall not exceed 2.5%. 3.2 Condition Solution and precipitation heat treated in accordance with AMS2768. SAE AMS4417B Page 3 of 83.3 Casting Castings shall be produced in
16、 lots from metal conforming to 3.1. Furnace or ladle additions of grain refining elements or alloys shall be added to the melt. Molten metal taken from alloying furnaces, with or without additions of foundry operating scrap (gates, sprues, risers, and rejected castings), shall not be poured into cas
17、tings unless first converted to ingot, analyzed, and remelted or unless the composition of a sample taken after the last addition to the melt conforms to 3.1. 3.3.1 A melt shall be the metal withdrawn from a batch-furnace charge of 2000 pounds (907 kg) or less as melted for pouring castings or, when
18、 permitted by purchaser, a melt shall be 4000 pounds (1814 kg) or less of metal withdrawn from one continuous furnace in not more than eight consecutive hours. 3.3.2 A lot shall be all castings poured from a single melt in not more than eight consecutive hours and solution and precipitation heat tre
19、ated in the same heat treat batch. 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 and shall be of any suitable size and shape. 3.4.2 Tensile Specimens Shall be cast with each lot of ca
20、stings, shall be of standard proportions conforming to ASTM B 557 or ASTM B 557M with 0.500 inch (12.70 mm) diameter at the reduced parallel gage section and shall be cast to size in molds made with the regular foundry mix of sand without using chills. Metal for the specimens shall be part of the me
21、lt which is used for the castings. If the metal for castings is given any treatment, such as fluxing or cooling and reheating, the metal for the specimens shall be a portion of the metal so treated and, during such treatment, shall be heated to the same maximum temperature and held for approximately
22、 the same time as the molten metal for the castings. Temperature of the metal during pouring of the specimens shall be not lower than that during pouring of the castings. 3.5 Heat Treatment Castings, integrally-cast coupons, and separately-cast tensile specimens shall be heated to a temperature not
23、exceeding 975 F (524 C) and held at heat for the proper time for solution heat treatment and quenched as required, reheated to a temperature between 380 to 400 F (193 to 204 C) and held at heat for the proper time for precipitation heat treatment; at least one set of tensile specimens shall, during
24、each stage of heat treatment, be put into a batch-type furnace with each load of castings or into a continuous furnace at intervals of not longer than 3 hours. Pyrometry shall be in accordance with AMS2750. 3.6 Properties Castings, integrally-cast coupons, and separately-cast tensile specimens produ
25、ced in accordance with 3.4.2 and heat treated in accordance with 3.5 shall conform to the following requirements: 3.6.1 Tensile Properties Conformance to the requirements of 3.6.1.1.1 shall be used as the basis for acceptance of castings except when purchaser specifies that the requirements of 3.6.1
26、.1.2 apply: 3.6.1.1 At Room Temperature Shall be as follows, determined in accordance with ASTM B 557 or ASTM B 557M: SAE AMS4417B Page 4 of 83.6.1.1.1 Separately-Cast Specimens as in 3.4.2 shall have the properties shown in Table 2: TABLE 2 - MINIMUM TENSILE PROPERTIES OF SEPARATELY-CAST SPECIMENS
27、Property Value Tensile Strength 34.0 ksi (234 MPa) Yield Strength at 0.2% Offset 25.0 ksi (172 MPa) Elongation in 4D 2.0% 3.6.1.1.2 Specimens Cut From Castings or from Integrally-Cast Coupons 3.6.1.1.2.1 The average tensile properties of specimens cut from thick and thin sections of a casting or cas
28、tings or from integrally-cast coupons as in 4.3.5 shall be as shown in Table 3: TABLE 3 - TENSILE PROPERTY AVERAGE FOR SPECIMENS CUT FROM CASTING OR FROM INTEGRALLY-CAST COUPONS Property Minimum Value Tensile Strength 32.0 ksi (221 MPa) Yield Strength at 0.2% Offset 23.0 ksi (159 MPa) Elongation in
29、4D 2.0% 3.6.1.1.2.2 Any specimen cut from a casting shall be not less than shown in Table 4: TABLE 4 - MINIMUM TENSILE PROPERTIES FOR ANY SPECIMEN CUT FROM CASTING Property Value Tensile Strength 28.0 ksi (193 MPa) Yield Strength at 0.2% Offset 20.0 ksi (138 MPa) Elongation in 4D 1.0% 3.6.1.2 At 400
30、 F (204 C) Shall be as follows, determined in accordance with ASTM E 21 on specimens heated to 400 F 5 (204 C 3), held at heat for not less than 10 minutes before testing, and tested at 400 F 5 (204 C 3): 3.6.1.2.1 Separately-Cast Specimens shall be as shown in Table 5: TABLE 5 - MINIMUM TENSILE PRO
31、PERTIES OF SEPARATELY-CAST SPECIMENS WHEN TESTED AT 400 F (204 C) Property Value Tensile Strength 25.0 ksi (172 MPa) Yield Strength at 0.2% Offset 19.0 ksi (131 MPa) SAE AMS4417B Page 5 of 83.6.1.2.2 Specimens Cut From Castings shall be as shown in Table 6: TABLE 6 - MINIMUM TENSILE PROPERTIES OF SP
32、ECIMENS CUT FROMCASTINGS WHEN TESTED AT 400 F (204 C) Property Value Tensile Strength 24.0 ksi (165 MPa) Yield Strength at 0.2% Offset 18.0 ksi (124 MPa) 3.6.1.3 When properties other than those specified in 3.6.1.1.2 and 3.6.1.2.2 are required, tensile specimens as in 4.3.4 taken from locations ind
33、icated 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 for such specimens may be designated in accordance with AMS2360, AMS2361, or both. 3.7 Quality 3.7.1 Castings, as rece
34、ived by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the castings. 3.7.1.1 Castings shall have smooth surfaces and shall be sufficiently cleaned to permit fluorescent penetrant inspection. 3.7.1.2 Castings
35、, cleaned by blasting, shall, prior to nondestructive inspection, be pickled in a sulfuric or sulfuric-nitric acid solution to remove not less than 0.002 inch (0.05 mm) of metal. 3.7.2 Castings shall be produced under radiographic control. This control shall consist of radiographic examination of ca
36、stings in accordance with ASTM E 1742 until proper foundry technique, which will produce castings free from harmful internal imperfections, is established for each part number and of production castings as necessary to ensure maintenance of satisfactory quality. 3.7.3 When specified, castings shall
37、be subjected to fluorescent penetrant inspection in accordance with ASTM E 1417. 3.7.4 Radiographic, fluorescent penetrant, and other quality acceptance standards shall be as agreed upon by purchaser and vendor. ASTM E 155 may be used to define radiographic acceptance standards. 3.7.5 Castings shall
38、 not be peened, plugged, or welded without written permission from purchaser. 3.7.5.1 When authorized by purchaser, defects in castings may be removed and the castings reworked by welding in accordance with AMS2694. 3.7.6 Castings shall not be impregnated, chemically treated, or coated to prevent le
39、akage unless specified or allowed by written permission of purchaser, designating the method to 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 te
40、sts. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the castings conform to specified requirements. SAE AMS4417B Page 6 of 84.2 Classification of Tests 4.2.1 Acceptance Tests Except as specified in 4.2.1.1, composition (3.1), tensile pr
41、operties at room temperature (3.6.1.1), and quality (3.7) are acceptance tests and shall be performed to represent each melt or lot as applicable. 4.2.1.1 Tensile properties of specimens cut from castings shall be determined only when specified by purchaser or when separately-cast specimens are not
42、available. Tensile properties of separately-cast specimens need not be determined when tensile properties of specimens cut from castings or from integrally-cast coupons are determined. 4.2.2 Periodic Tests Tensile properties at 400 F (200 C) (3.6.1.2) are periodic tests and shall be performed at a f
43、requency 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 prior to or on the first-article shipment of a casting to a purchaser, when a change in ingredients and/or proces
44、sing 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 At least one chemical analysis specimen in accordance with 3.4.1 and with ASTM B 953 from each melt and/or a casting from each
45、 lot. 4.3.2 One separately-cast tensile specimens in accordance with 3.4.2 from each lot except when purchaser requires properties of specimens cut from castings or from integrally-cast coupons. 4.3.3 Two preproduction castings in accordance with 4.4.1 of each part number. 4.3.4 Except as specified
46、in 4.3.5, one or more castings from each lot when properties of specimens cut from castings are required. Specimens 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 gage section, subsize specimens proportional to the standard, or s
47、tandard sheet-type specimens. For determining conformance to the requirements of 3.6.1.3, if specimen locations are not shown on the drawing, not less than four tensile specimens, two from the thickest section and two from the thinnest section, shall be cut from a casting or castings from each lot.
48、4.3.5 When permitted by purchaser, test bars cast integrally with the casting may be tested in lieu of testing the casting itself, provided the casting is too small for either excising test coupons or testing of the casting as a whole, and the thickness of the test bars is equal to or greater than t
49、he thickness of the portions of the castings to which the bars are attached. Test bars shall not be removed from the casting until all heat treatments have been completed, unless the bars interfere with inspection processes or straightening whereupon they may be removed after solution heat treatment, but must accompany the associated casting during precipitation heat treatment. 4.4 Approval: 4.4.1 Sample castin
