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/AMS4371B AEROSPACE MATERIAL SPECIFICATION AMS4371 REV. B Issued 2013-03 Revised 2
5、015-06 Superseding AMS4371A Magnesium Alloy, Plate 4.0Y - 2.25Nd - 0.5Zr (WE43C - T5) Precipitation Heat Treated (Composition similar to UNS M18434) RATIONALE AMS4371B revises Properties (3.4.1.1, Table 2) and Reports (4.4.1). 1. SCOPE 1.1 Form This specification covers a magnesium alloy in the form
6、 of rolled plate from 0.500 up to 6.0 inches (12.7 to152.4 mm) inches inclusive (See 8.4). 1.2 Application This product has been used typically for parts requiring a combination of light weight, high yield strength up to 480nullF (250nullC), relatively high corrosion resistance, and good flammabilit
7、y resistance for magnesium alloys, but usage is not limited 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
8、 of a document unless a specific document issue is specified. 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, Warrenda
9、le, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2355 Quality Assurance, Sampling and Testing, Aluminum Alloys and Magnesium Alloy, Wrought Products (Except Forging Stock), and Rolled, Forged, or Flash Welded Rings AMS2750 Pyrometry SAE I
10、NTERNATIONAL AMS4371B Page 2 of 5 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 B117 Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM B557 Tension Testing Wrought a
11、nd Cast Aluminum- and Magnesium- Alloy Products ASTM B557M Tension Testing Wrought and Cast Aluminum- and Magnesium- Alloy Products (Metric) ASTM B660 Packaging/Packing of Aluminum and Magnesium Products ASTM B666/B666M Identification Marking of Aluminum and Magnesium Products ASTM B953 Sampling Mag
12、nesium and Magnesium Alloys for Spectrochemical Analysis ASTM B954 Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry 2.3 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036, Tel: 212-642-4900, www.ansi.or
13、g. ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined by spectrochemical methods in accordance with ASTM
14、B954, or by other analytical methods acceptable to purchaser. Table 1 - Composition Element min max Yttrium Neodymium Zinc 3.7 2.0 - 4.3 2.5 0.06 Zirconium Other Rare Earths (3.1.1) Manganese Copper Iron Nickel 0.2 0.3 - - - - 1.0 1.0 0.03 0.02 0.005 0.0020 Other Elements, each (3.1.2) - 0.01 Magnes
15、ium remainder SAE INTERNATIONAL AMS4371B Page 3 of 5 3.1.1 Other Rare Earths are heavy rare earths, such as Gadolinium, Dysprosium, Erbium, Samarium, and Ytterbium. The 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
16、.1.2 Determination not required for routine acceptance. 3.2 Condition Precipitation heat treated. 3.2.1 Rolled plate shall be supplied with an as-rolled surface finish; light polishing to remove minor surface imperfections is permissible provided such imperfections can be removed within specified di
17、mensional tolerances. 3.3 Heat Treatment Plate shall be precipitation heat treated by heating to a temperature between 392 to 482 F (200 to 250 C), and holding at heat for the proper time for precipitation heat treatment to meet the requirements of 3.4, and air cooling. Pyrometry shall be in accorda
18、nce with AMS2750. 3.4 Properties Plate shall conform to the requirements of 3.4.1 and 3.4.2. 3.4.1 Tensile Properties Shall be as shown in Table 2, determined in accordance with ASTM B557 or ASTM B557M. 3.4.1.1 Properties outside the range listed in 1.1 shall be agreed upon between purchaser and pro
19、ducer. Table 2A - Minimum tensile properties, inch/pound units Nominal Thickness Inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 4D % 0.500 to 1.50 incl. 44 33 12 Over 1.50 to 6.0, incl 47 30 6 Table 2B - Minimum tensile properties, SI units Nominal Thickness Millimeters
20、Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 4D % 12.7 to 38.1, incl. 303 228 12 Over 38.1 to 152.4, incl 324 207 6 3.4.2 Corrosion Resistance Corrosion rate of material, tested in accordance with 3.4.2.1, shall be less than 50 mpy. SAE INTERNATIONAL AMS4371B Page 4 of 5 3.4.
21、2.1 Corrosion rate shall be determined in accordance with ASTM B117 except that, prior to exposure, specimens shall be accurately weighed to within null0.01 g (W1). Specimens shall be exposed to the salt spray for not less than 120 hours. Following exposure, specimens shall be rinsed with tap water
22、and cleaned of adherent corrosion product by immersing in a hot 190 nullF 88 nullC 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 (W
23、1 - W2) and used for calculating corrosion rate, using the following equations: CR (mcd) = WL / (SA x EP) CR mils (0.001 inch) per year = (CR (mcd) / D) x 143.7 Where: WL = Measure weight loss in mg SA = Total surface area of specimen in cm2EP = Exposure time in days D = Density, 1.82 gram/cm3mcd =
24、mg/cm2per day 3.5 Quality Plate, 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 plate. 3.6 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY
25、ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of plate 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 confirmatory testing deemed necessary to ensure that the
26、 plate conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.4.1), and tolerances (3.6) are acceptance tests and shall be performed on each inspection lot. 4.2.2 Periodic Tests Corrosion resistance (3.4.2) is a periodic test a
27、nd shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2355. SAE INTERNATIONAL AMS4371B Page 5 of 5 4.4 Reports The vendor of the product shall furnish with each shipment a report show
28、ing the results of tests for composition and tensile properties of each inspection lot and stating that the plates conform to the periodic test properties when performed and to the other technical requirements. This report shall include the purchase order number, inspection lot number, AMS4371B, siz
29、e or section identification number, and quantity. 4.4.1 When the product size is outside the range covered by 1.1, the report shall contain a statement to that effect. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accorda
30、nce with ASTM B666/B666M. 5.2 Packaging Plates shall be prepared for shipment in accordance with ASTM B660 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the plates to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT
31、 A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (l) loc
32、ated 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 issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical rev
33、isions. 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 clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI unit
34、s and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 Purchase documents should specify not less than the following: AMS4371B Form and size or section identification number of plates desired Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1 Quantity of plate desired. PREPARED BY AMS COMMITTEE “D”
