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 2010 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/AMS4458AEROSPACEMATERIALSPECIFICATIONAMS4458 Issued 2010-05 Aluminum Alloy, Plate (2.7 Cu - 1
5、.8 Li - 0.7 Zn) 2099-T86 Solution Heat Treated, Cold Worked and Artificially Aged (Composition similar to UNS A92099) RATIONALE This is a new specification for an aluminum alloy in the form of plate. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of plate. 1.2 Application
6、This plate has been used typically for parts requiring strength similar to that of 7050-T7451, good resistance to stress-corrosion cracking, and having 7.1% lower nominal density, but usage is not limited to such applications. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on
7、 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 cancelled and no superseding document has been specifie
8、d, 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) or 724-776-4970 (outside USA), www.sae.org.AMS2355 Quality Assurance, Sampling and Testing, Al
9、uminum Alloys 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 Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction o
10、r networking permitted without license from IHS-,-,-SAE AMS4458 Page 2 of 62.2 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 645 Linear-Elastic Plane-Strain Fracture Toughness Testin
11、g of Aluminum Alloys ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications ASTM B 660 Packing/Packaging of Aluminum and Magnesium Products ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM E 399 Linear-Elastic Plane-Strain Fracture Toug
12、hness 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 Cracking of 2XXX and 7XXX Aluminum Alloy Products ASTM G 85 Standard Practice for Modified Salt Spray (Fog) Testi
13、ng 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 for Aluminum Mill Products (Metric) 3. TECHNICA
14、L 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 Max Silicon 0.05 Iron 0.07 Copper 2.4 3.0 Manganese 0.10 0.50Magnesium 0.10 0.50Zinc 0.40 1.0 Titanium 0.10 Beryllium 0.0001Lithium 1.6
15、 2.0 Zirconium 0.05 0.12Other elements - each 0.05 Other elements - total 0.15 Aluminum Remainder 3.2 Condition Heat treatment shall be in accordance with AMS2772 to the T86 temper (See AS1990) and as follows: Solution heat treated, stretched to produce a nominal permanent set of 6% and precipitatio
16、n heat treated to the T86 temper (see AS1990). Solution heat treatment and artificial age practices are proprietary. 3.2.1 Plate shall receive no further straightening operations after stretching. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or netw
17、orking permitted without license from IHS-,-,-SAE AMS4458 Page 3 of 63.3 Properties Product shall conform to the following requirements, determined 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
18、Thickness (Inches) Specimen Orientation Tensile Strength (ksi) YieldStrength (ksi) Elongation in 2 inches or 4D (%) 0.500 through 2.000 Longitudinal Long Transverse71.0 72.0 63.0 62.0 65TABLE 2B - MINIMUM TENSILE PROPERTIES, SI UNITS Nominal Thickness (millimeters) Specimen Orientation Tensile Stren
19、gth (MPa) YieldStrength (MPa) Elongation in 50.8 mm or 4D (%) 12.70 through 50.80 Longitudinal Long Transverse 490 496 434 427 653.3.2 Exfoliation Corrosion Resistance Specimens shall not exhibit exfoliation corrosion at a T/10 plane greater than that illustrated by Photo 2 (EB) from Figure 2 of AST
20、M G 34 when specimens are exposed for 2 weeks according to the procedures in ASTM G 85 Annex A2, using the dry-bottom MASTMAASIS Test Method. 3.3.3 Stress-Corrosion Test When specified, specimens from plate 0.750 inch (19.05 mm) and over in nominal thickness shall be tested in accordance with ASTM G
21、 47 shall show no evidence of stress-corrosion cracking when stressed in the short transverse direction at 50.0 ksi (345 MPa) and in the long transverse direction at 55.0 ksi (379 MPa). This product can exhibit elongated pitting, with the short axis of the pitting parallel to the ST direction. The p
22、itting behavior has been observed under zero load and has been shown to be independent of applied stress. When performing a visual examination of a SCC specimen tested in the ST direction, the elongated pits can be mistaken for stress corrosion cracks. Metallographic analyses, as provided in ASTM G
23、47, may be used to verify the absence of SCC. 3.3.4 Fracture Toughness When specified, plane strain fracture toughness shall be tested in accordance with ASTM E 399 and ASTM B 645. The required test orientations shall be specified by the purchaser. The test specimens shall meet the following require
24、ments: 3.3.4.1 For L-T and T-L test orientations use a test specimen having a width (W) of 3.0 inches (76 mm). For plate 1.000 to 1.500 inches (25.40 to 38.10 mm) in nominal thickness, the test specimen thickness (B) is full plate thickness. For plate 1.501 to 2.000 inches (38.13 to 50.80 mm) in nom
25、inal thickness, the test specimen thickness (B) shall be 1.5 inches (38 mm) and the specimen is centered at the mid-thickness (T/2). 3.3.4.2 A valid KICmeeting the requirements of ASTM E399 or a KQ“usable for lot release” in accordance with ASTM B 645 shall meet or exceed the values shown in Table 3
26、A and 3B. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4458 Page 4 of 6TABLE 3A - MINIMUM FRACTURE TOUGHNESS PARAMETERS, INCH/POUND UNITS Nominal Thickness (Inches) L-T ksiinchT-L ksiinch1.
27、000 - 2.000 30 25TABLE 3B - MINIMUM FRACTURE TOUGHNESS PARAMETERS, SI UNITS Nominal Thickness (millimeters) L-T MPamT-L MPam25.40 - 50.80 33 273.4 Quality Plate, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrime
28、ntal to usage of the plate. 3.4.1 When specified, each plate 0.500 inch to 2.000 inches (12.70 mm to 50.80 mm) in nominal thickness shall be ultrasonically inspected in accordance with ASTM B 594 and shall meet the requirements of 3.4.1.1. 3.4.1.1 Plates shall meet the requirements for ultrasonic cl
29、ass A for plate 0.500 to 2.000 inches (12.70 to 50.80 mm) in nominal thickness. 3.5 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or H35.2M. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of plate shall supply all samples for vendors tests and sh
30、all 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 plate conforms to the specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile
31、 properties (3.3.1), tolerances (3.5), and, when specified, fracture toughness (3.3.4), and ultrasonic soundness (3.4.1) are acceptance tests and except for composition, shall be performed on each lot. 4.2.2 Periodic Tests Exfoliation corrosion resistance (3.3.2) and stress-corrosion resistance (3.3
32、.3) are periodic tests and 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 and the following: 4.3.1 Tensile specimens shall be taken with axis of specimens parallel to each ap
33、plicable grain flow direction specified in Table 2. 4.3.2 When fracture 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. Copyright SAE International Provided by IHS under license wit
34、h SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS4458 Page 5 of 64.4 Reports The vendor of plate shall furnish with each shipment a report stating that the plate conforms to the composition, tolerances and, when specified, ultrasonic inspection and showi
35、ng 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), AMS4458, size, and quantity. The report shall also identify the producer, the product form, and
36、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 damage during storage and shipment by a method determined by vendor unle
37、ss 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 compliance with applicable rules and regulations pertaining to the handl
38、ing, packaging, and transportation of the plate to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall mention this specification number in all quotations and when acknowledging orders. 7. REJECTIONS Plate not conforming to this specification, or to modifications authorized
39、 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, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the documen
40、t 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 changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units are
41、 primary; dimensions and properties in SI units 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: AMS4458 Size of plate desired Quality of plate desired Fracture toughness testing (
42、if required) and specimen orientation (See 3.3.5) Ultrasonic inspection (if required) (See 3.4.1). 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-,-,-SAE AMS4458 Page 6 of 6Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
