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 2017 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: +1 724-776-4970
4、 (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:/standards.sae.org/AMS4468 AEROSPACEMATERIAL SPECIFICATIONAMS4468 Issued 2012-01 Reaffirmed 2017-09 Aluminum Alloy,
5、Plate 5.0Cu - 0.4Mn - 0.5Mg - 0.4Ag (2139-T84) Solution Heat Treated, Cold Worked, and Artificially Aged (Composition similar to UNS A92139) RATIONALE AMS4468 has been reaffirmed to comply with the SAE Five-Year Review policy. 1. SCOPE1.1 Form This specification covers an aluminum alloy in the form
6、of plate. 1.2 Application This product has been used typically for parts requiring a high level of mechanical properties and good resistance to stress-corrosion cracking, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTSThe issue of the following documents in effect on the date
7、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 cancelled and no superseding document has been specified, the las
8、t 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 USA), www.sae.org. AMS2355 Quality Assurance, Sampling and Testing, Aluminum Al
9、loys and Magnesium Alloy, Wrought Products (Except Forging Stock), and Rolled, Forged, or Flash Welded Rings AMS2772 Heat Treatment of Aluminum Alloy Raw Materials AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Consho
10、hocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications ASTM B 645 Linear-Elastic Plain-Strain Fracture Toughness of Aluminum Alloys ASTM B 660 Packing/Packaging of Aluminum and Magnesium Products ASTM B 666/B 666
11、M Identification Marking of Aluminum and Magnesium Products ASTM E 399 Linear-Elastic Plane-Strain Fracture Toughness KICof Metallic Materials ASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test) ASTM G 47 Determining Susceptibility to Stress-Corrosion C
12、racking of 2XXX and 7XXX Aluminum Alloy 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 H35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances
13、for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355. TABLE 1 - COMPOSITION Element min maxSilicon - 0.10Iron - 0.15Copper 4.5 5.5 Manganese 0.20 0.6 Magnesium 0.20 0.8 Chromiu
14、m - 0.05Zinc - 0.25Titanium - 0.15Silver 0.15 0.6 Vanadium - 0.05Other Elements, each - 0.05Other Elements, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS4468 Page 2 of 6_ 3.2 Condition Solution heat treated, stretched to produce a nominal permanent set of 4% but not less than 3% nor more tha
15、n 6%, and precipitation heat treated to the T84 temper (See AS1990). Solution and precipitation heat treatment shall be performed in accordance with AMS2772 as applicable to 2XXX alloys. The actual practices are proprietary. Plate shall receive no further straightening operations after stretching. 3
16、.3 Properties Product shall conform to the following requirements determined on the mill produced size in accordance with AMS2355. 3.3.1 Tensile Properties Shall be as specified in Table 2. TABLE 2A - MINIMUM TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inches Specimen Orientation Tensile
17、Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 inches or 4D% 1.000 to 1.500 Longitudinal 65.0 62.0 11 Long Trans. 67.0 61.0 8 Short Trans. 63.0 55.0 5 1.501 to 3.750 Longitudinal 66.0 62.0 9 Long Trans. 68.0 61.0 7 Short Trans. 62.0 55.0 4 3.751 to 5.000 Longitudinal 65.0 59.0 8 Long
18、 Trans. 67.0 59.0 6 Short Trans. 61.0 53.0 4 TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters Specimen Orientation Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation in 5D or 5.65 A % 25.40 to 38.10, incl Longitudinal 448 427 10 Long Trans. 462 421 7 Short
19、 Trans. 434 379 4 Over 38.10 to 95.25, incl Longitudinal 455 427 8 Long Trans. 469 421 6 Short Trans. 427 379 3 Over 95.25 to 127.00, incl Longitudinal 448 407 7 Long Trans. 462 407 5 Short Trans. 421 365 3 3.3.2 Corrosion-Resistance Resistance to stress-corrosion cracking and to exfoliation-corrosi
20、on shall be acceptable if the plate conforms to the requirements of 3.3.2.1 and 3.3.2.2. SAE INTERNATIONAL AMS4468 Page 3 of 6_ 3.3.2.1 Exfoliation-Corrosion Test Plate shall not exhibit exfoliation-corrosion greater than that illustrated by Photo B, Figure 2, of ASTM G 34. 3.3.2.2 Stress-Corrosion
21、Test Specimens cut from plate 0.750 inch (19.05 mm) and over in nominal thickness, machined and tested in accordance with ASTM G 47 shall show no evidence of stress-corrosion cracking when stressed in the short- transverse direction at 40.0 ksi (276 MPa) when exposed for 30 days 3.3.3 Fracture Tough
22、ness When required by purchaser, plane strain fracture toughness shall be tested in accordance with ASTM E 399 and ASTM B 645. The required specimen orientation(s) shall be specified by purchaser. 3.3.3.1 The specimens shall meet the following requirements: 3.3.3.1.1 For T-L and L-T test directions
23、on plate 2 inches (51 mm) and under in nominal thickness, use full-thickness specimens; for plate over 2 to 4 inches (51 to 102 mm), inclusive, in nominal thickness, use specimens 2-inch (51-mm) minimum thickness centered at T/2; and for plate over 4 inches (102 mm) in nominal thickness, use specime
24、ns 2-inch (51-mm) minimum thickness centered at T/4. For the S-L test direction, the test specimen shall be centered at T/2. 3.3.3.2 A valid K1Cmeeting the requirements of ASTM E 399 or KQ“usable for lot release” in accordance with ASTM B 645 shall meet or exceed the values shown in Table 3A and Tab
25、le 3B TABLE 3A - MINIMUM FRACTURE TOUGHNESS PARAMETERS, INCH/POUND UNITS Nominal Thickness Inches L-T ksi T-L ksi S-L ksi 1.000 to 2.000, incl 35 32 Over 2.000 to 3.750, incl 35 32 27 Over 3.750 to 5.000, incl 32 30 27 TABLE 3B - MINIMUM FRACTURE TOUGHNESS PARAMETERS, SI UNITS Nominal Thickness Mill
26、imeters L-T MPa T-L MPa S-L MPa 25.40 to 50.80, incl 38 35 Over 50.80 to 95.25, incl 38 35 30 Over 95.25 to 127.00, incl 35 33 30 3.4 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
27、 of the plate. 3.4.1 When required by purchaser, each plate 1.000 to 5.000 inches (25.40 to 127.00 mm) in nominal thickness shall be ultrasonically inspected in accordance with ASTM B 594 and shall meet the requirements for ultrasonic class A 3.5 Tolerances Shall conform to all applicable requiremen
28、ts of ANSI H35.2 or H35.2M. SAE INTERNATIONAL AMS4468 Page 4 of 6_ 4. QUALITY 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 samp
29、le and to perform any confirmatory testing deemed necessary to ensure that the plate conforms to the specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), tolerances (3.5), and, when required by purchaser, fracture toughness (3.3.3)
30、 and ultrasonic soundness (3.4.1) are acceptance tests and except for composition, shall be performed on each inspection lot. 4.2.2 Periodic Tests Exfoliation corrosion resistance (3.3.2.1) and stress-corrosion resistance (3.3.2.2) are periodic tests and shall be performed at a frequency selected by
31、 the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS2355 and the following: 4.3.1 Tensile specimens shall be taken with axis of specimens parallel to each applicable grain flow direction specified in Table 2. 4.3.2 When fracture
32、toughness testing is specified, specimens shall be taken from the center width of at least one plate in each lot for each specimen orientation specified by purchaser. 4.4 Reports The vendor of plate shall furnish with each shipment a report stating that the plate conforms to the composition, toleran
33、ces and when required by purchaser, ultrasonic inspection, and showing the numerical results of tests on each inspection lot to determine conformance to the other acceptance test requirements. This report shall include the purchase order number, inspection lot number(s), AMS4468, size, and quantity.
34、 The report shall also identify the producer, the product form, and the size of the mill product. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with ASTM B 666/B 666M. 5.1.1 Product shall be protected from dama
35、ge during storage and shipment by a method determined by vendor unless specified by purchaser. Examples of typical protective methods include but are not limited to interleaving with paper or oiling of the surfaces. 5.1.2 Plate shall be prepared for shipment in accordance with ASTM B 660 and in comp
36、liance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the plate to ensure carrier acceptance and safe delivery. SAE INTERNATIONAL AMS4468 Page 5 of 6_ 6. ACKNOWLEDGMENT A vendor shall mention this specification number in all quotations and when ack
37、nowledging purchase orders. 7. REJECTIONS Plate not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, no
38、t 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 revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial
39、 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 units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are prese
40、nted only for information. 8.4 Purchase documents should specify not less than the following: AMS4468 Size of plate desired Quality of plate desired Fracture toughness testing (if required) and specimen orientation (See 3.3.5) Ultrasonic inspection (if required) (See 3.4.1). PREPARED BY AMS COMMITTEE “D” SAE INTERNATIONAL AMS4468 Page 6 of 6_
