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 2012 SAE InternationalAll rights reserved. No part of this publication may b
3、e 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 USA)Fax
4、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4485AEROSPACEMATERIALSPECIFICATIONAMS4485Issued 2012-12Magnesium Alloy, Extrusions4.0Y - 2.25Nd - 0.5Z
5、r (WE43C - T5)Precipitation Heat Treated(Composition similar to UNS M18434)RATIONALEAMS4485 is a new specification for magnesium alloy WE43C in the form of extrusions. 1. SCOPE1.1 FormThis specification covers a magnesium alloy in the form of extruded bars, rods, wire, tubing, and profiles.1.2 Appli
6、cationThese extrusions have been used typically for parts requiring a combination of light weight, high yield strength up to 480 F (250 C), relatively high corrosion resistance, and good flammability resistance for magnesium alloys,but usage is not limited to such applications.2. APPLICABLE DOCUMENT
7、SThe 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 document has been cance
8、lled and no superseding document has been specified, the last published issue of that document shall apply.2.1 SAE PublicationsAvailable 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.AMS
9、2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded RingsAMS2750 PyrometryCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted
10、 without license from IHS-,-,-SAE AMS4485 Page 2 of 52.2 ASTM PublicationsAvailable 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 117 Operating Salt Spray (Fog) ApparatusASTM B 557/B 557M Tension Testing Wrought
11、 and Cast Aluminium- and Magnesium- Alloy ProductsASTM B 660 Packaging/Packing of Aluminum and Magnesium ProductsASTM B 666/B 666M Identification Marking of Aluminum and Magnesium ProductsASTM B 953 Sampling Magnesium and Magnesium Alloys for Spectrochemical AnalysisASTM B 954 Analysis of Magnesium
12、and Magnesium Alloys by Atomic Emission Spectrometry3. TECHNICAL REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined by spectrochemical methods in accordance withASTM B 954, or by other analytical methods acceptible to purchaser.TABLE 1 - COMPOSITIONEle
13、ment min maxYttriumNeodymiumZinc3.72.0-4.32.50.06ZirconiumOther Rare Earths (3.1.1)ManganeseCopperIronNickel0.20.3-1.01.00.030.020.0050.0020Other Elements, each - 0.01Magnesium remainder3.1.1 Other Rare Earths are heavy rare earths, such as Gadolinium, Dysprosium, Erbium, Samarium, and Ytterbium. Th
14、e total of Gadolinium + Dysprosium + Erbium shall be 0.3-1.0%. Samarium shall not exceed 0.04% and Ytterbium shall not exceed 0.02%3.2 ConditionPrecipitation heat treated.3.2.1 Extrusions shall be supplied with an as-extruded surface finish; light polishing to remove minor surface imperfections is p
15、ermissible provided such imperfections can be removed within specified dimensional tolerances.3.3 Heat TreatmentExtrusions shall be precipitation heat treated by heating to a temperature between 392 to 482 F (200 to 250 C), andholding at the selected temperature 10 F (6 C) for the proper time for pr
16、ecipitation heat treatment to meet the requirements of 3.4, and air cooling. Pyrometry shall be in accordance with AMS2750.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4485 Page 3 of 53.4 P
17、ropertiesTensile Properties: Extrusions 0.50 to 4.75 inches, incl. (12.7 to 120.7 mm., incl.) in nominal thickness, shall have tensile properties as specified in Table 2, determined in accordance with ASTM B 557 or ASTM B 557M.TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITSTensileStrengthksi
18、Yield Strengthat 0.2% OffsetksiElongationin 4D%44.0 28.0 6TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITSTensileStrengthMPaYield Strengthat 0.2% OffsetMPaElongationin 4D%303 195 63.4.1 Corrosion ResistanceCorrosion rate of material, tested in accordance with 3.4.2.1, shall be less than 50 mpy.3.4.1.
19、1 Corrosion rate shall be determined in accordance with ASTM B 117 except that, prior to exposure, specimens shall be accurately weighed to within 0.01g (W1). Specimens shall be exposed to the salt spray for not less than 120 hours. Following exposure, specimens shall be rinsed with tap water and cl
20、eaned of adherent corrosion product by immersing in a hot (190 F (88 C) 20% Chromic acid plus 1% silver nitrate solution for 1 to 2 minutes. Cleaned specimens shall be rinsed in hot water, dried in a stream of hot air, and weighed (W2). The measured weight loss (WL) shall be calculated (W1-W2) and u
21、sed for claculating corrosion rate, using the following equations: CR (mcd) = WL / (SA x EP)CR mils (0.001 inch) per year = (CR (mcd) / D) x 143.7Where:WL = Measure weight loss in mgSA = Total surface area of specimen in cm2EP = Exposure time in daysD = Density, 1.82 gram/cm3mcd = mg/cm2per day3.5 Q
22、ualityExtrusions, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the extrusions.3.6 TolerancesShall conform to all applicable requirements of ANSI H 35.2 or ANSI H 35.2M.Copyright SAE Internat
23、ional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4485 Page 4 of 54. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionThe vendor of extrusions shall supply all samples for vendors tests and shall be respo
24、nsible 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 extrusions conform to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), tensile properties (3.
25、4.1), and tolerances (3.6) are acceptance tests and shall be performed on each inspection lot.4.2.2 Periodic TestsCorrosion resistance (3.4.2) is a periodic test and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser.4.3 Sampling and Testin
26、gShall be in accordance with AMS23554.4 ReportsThe vendor of extrusions shall furnish with each shipment a report showing the results of tests for composition and tensile properties of each inspection lot and stating that the extrusions conform to the periodic test properties when performed and to t
27、he other technical requirements. This report shall include the purchase order number, inspection lot number, AMS4485, size or section identification number, and quantity.4.5 Resampling and RetestingShall be in accordance with AMS2355.5. PREPARATION FOR DELIVERY5.1 IdentificationShall be in accordanc
28、e with ASTM B 666/B 666M.5.2 PackagingExtrusions 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 extrusions to ensure carrier acceptance and safe delivery.6. ACKNOWLE
29、DGMENTA vendor shall mention this specification number in all quotations and when acknowledging purchase orders.7. REJECTIONSExtrusions not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.Copyright SAE International Provided by IHS under li
30、cense with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4485 Page 5 of 58. NOTES8.1 A change bar (|) 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
31、 previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revision. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.8.2 Terms used in AMS are cla
32、rified in ARP1917.8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information.8.4 Purchase docume
33、nts should specify not less than the following:AMS4485Form and size or section identification number of extrusions desiredQuantity of extrusions desired.PREPARED BY AMS COMMITTEE “D”Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
