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 2011 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/AMS4268AEROSPACEMATERIALSPECIFICATIONAMS4268 Issued 2011-12 Aluminum Alloy, Sheet
5、 and Plate 4.4Cu - 1.5Mg - 0.60Mn; (2024-T81 Sheet, -T851 Plate) Solution Heat Treated, Cold Worked and Artificially Aged (Composition similar to UNS A92024)RATIONALE AMS4268 is a new specification for 2024-T81/-T851 bare sheet and plate to facilitate cancellation of AMS-QQ-A-250/4. 1. SCOPE 1.1 For
6、m This specification covers an aluminum alloy in the form of sheet and plate supplied in the -T81/-T851. 1.2 Application These products have been used typically for high strength parts requiring higher yield strength than is afforded by naturally aged tempers of this alloy and whose fabrication does
7、 not involve welding, 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 of a documen
8、t 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, Warrendale, PA 15096-
9、0001, Tel: 877-606-7323 (inside USA and Canada) or 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 AMS2772 Heat Treatment of Aluminum Alloy
10、 Raw Materials AS1990 Aluminum Alloy Tempers Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4268 Page 2 of 6 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.
11、O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium All
12、oy Products 2.3 ANSI Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org.ANSI H 35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H 35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)
13、3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight as shown in Table 1, determined in accordance with AMS2355. TABLE 1 Element min max Silicon - 0.50 Iron - 0.50 Copper 3.8 4.9 Manganese 0.30 0.9 Magnesium 1.2 1.8 Chromium - 0.10 Zinc - 0.25 Titanium - 0.15Other Ele
14、ments, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.2 Condition The product shall be supplied in the following condition: 3.2.1 Sheet Solution heat treated in accordance with AMS2772, cold worked and artificially aged to the T81 temper (See AS1990). 3.2.2 Plate Solution heat treated
15、 in accordance with AMS2772, stretched to produce a nominal permanent set of 2% but not less than 1-1/2% nor more than 3%, and artificially aged to the T851 temper (See AS1990). Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted wi
16、thout license from IHS-,-,-SAE AMS4268 Page 3 of 6 3.2.2.1 Plate shall receive no further straightening operations after stretching. 3.3 Properties The product shall conform to the following requirements, determined in accordance with AMS2355 on the mill produced size. 3.3.1 Tensile Properties Shall
17、 be as shown in Table 2 (See 8.3). TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Temper Nominal Thickness, Inches Tensile Strength, ksi Yield Strength at 0.2% Offset, ksi Elongation in 2 inches or 4D, %-T81 0.010 to 0.249, incl 67.0 58.0 5 -T851 Over 0.249 to 0.499, incl Over 0.499 to 1.00
18、0, incl Over 1.000 to 1.500 67.0 66.0 66.0 58.0 58.0 57.0 555TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Temper Nominal Thickness, MillimetersTensile Strength, MPaYield Strength at 0.2% Offset, MPaElongation in 50.8 mm or 4D, %-T81 0.254 to 6.32, incl 462 400 5 -T851 Over 6.32 to 12.67, incl Ove
19、r 12.67 to 38.10, incl Over 25.40 to 38.07 462 455 455 400 400 393 5553.3.2 Response to Heat Treatment (-T42, -T62, dimensions and properties in SI units and Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 The tensile pro
20、perties in Tables 2 and 3 were taken directly from QQ-A-250/4E Amendment 2 (AMS-QQ-A-250/4A) and have not been independently verified by AMS statistical procedures. 8.5 Purchase documents should specify not less than the following: AMS4268 Product form and size of product desired Quantity of product 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-,-,-
