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 2013 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/AMS4287A AEROSPACE MATERIAL SPECIFICATION AMS4287 REV. A Issued 2006-04 Revised 2
5、007-12 Reaffirmed 2013-12 Superseding AMS4287Aluminum Alloy, Extrusion 2.7Cu - 1.8Li - 0.7Zn - 0.3Mn - 0.3Mg - 0.08Zr (2099-T83) Solution Heat Treated, Stress Relieved by Stretching 1% to 4% and Aged (Composition similar to UNS A92099) RATIONALE AMS4287A has been reaffirmed to comply with the SAE fi
6、ve-year review policy. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of extruded bars, rods, and profiles (shapes) produced with cross sectional area of 42 square inches (271 cm2) maximum and a circumscribing circle diameter (circle size) of 15 inches (38 cm) maximum. See
7、 section 8.3 for definition of circumscribing circle size. 1.2 Application These extrusions have been used typically for machined parts requiring high strength but usage is not limited to such applications. 1.3 Certain processing procedures may cause this product to become susceptible to stress-corr
8、osion cracking; ARP823 recommends practices to minimize such conditions. 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 doc
9、ument 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 15
10、096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock and Rolled, Forged, or Flash Welded Rings AMS 2772 Heat Treatment of Aluminum
11、Alloy Raw Materials SAE INTERNATIONAL AMS4287A Page 2 of 5 ARP823 Minimizing Stress-Corrosion Cracking in Wrought Heat Treatable Aluminum Alloy Products AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA
12、19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications ASTM G 34 Exfoliation Corrosion Susceptibility in 2xxx and 7xxx Series Aluminum Alloys (EXCO Test) ASTM B 660 Standard Practices for Packaging/Packing of Alumin
13、um and Magnesium Products. ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM E 1004 Standard Practice for Determining Electrical Conductivity Using the Electromagnetic (Eddy-Current) Method ASTM G34 Exfoliation Corrosion Susceptibility in 2xxx and 7xxx Aluminum Alloys
14、(EXCO Test) ASTM G 47 Standard Test Method for Determining Susceptibility to Stress-Corrosion Cracking of 2XXX and 7XXX Aluminum Alloy Products ASTM G 85 Standard Practice for Modified Salt Spray (Fog) Testing, Annex A2 (cyclic acidified salt spray test - dry bottom MASTMAASIS) 2.3 ANSI Publications
15、 Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036, 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) 3. TECHNICAL REQUIREMENTS 3.1 Composi
16、tion Shall conform to the percentages by weight shown in Table 1 determined in accordance with AMS 2355. TABLE 1 - COMPOSITION Element min max Silicon - 0.05 Ir - 0.07 Copper 2.4 3.0 Manganese 0.10 0.50 Magnesium 0.10 0.50 Zinc 0.4 1.0 Titanium - 0.10 Lithium 1.6 2.0 Zirconium 0.05 0.12 Beryllium -
17、0.0003 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.2 Condition Extruded, solution heat-treated and stress-relieved by stretching to produce a nominal permanent set of 1% to 4% and then artificial aged to T83. (See AS1990) 3.2.1 Product shall be supplied with an as-e
18、xtruded surface finish; light polishing to remove minor surface conditions is permissible provided such conditions can be removed within specified dimensional tolerances. SAE INTERNATIONAL AMS4287A Page 3 of 5 3.2.2 Product may receive minor straightening, after stretching, of an amount necessary to
19、 meet the requirements of 3.6. 3.3 Heat Treatment 3.3.1 Heat Treatment procedures shall be in accordance with the requirements of AMS 2772 and the following: 3.3.1.1 Solution Heat Treatment Temperature Heat to 1010 F 20 (543 C 11). (See Note 8.5) 3.3.1.2 Aging Heat Treatment Heat to 250 qF 10 (121qC
20、 6), hold at heat for a time of 10 hours to 14 hours, then heat to 305 qF 10 (152 qC 6), hold at heat for a time of 42 hours to 54 hours, and air cool. 3.4 Properties Product shall conform to the following requirements, determined in accordance with AMS 2355 on the mill product size: 3.4.1 Longitudi
21、nal Tensile Properties shall be as shown in Table 2A and 2B. TABLE 2A - MINIMUM LONGITUDINAL TENSILE PROPERTIES, INCH/POUND UNITS Nominal Thickness Inches TensileStrengthksi Yield Strengthat 0.2% Offsetksi Elongation in 2 Inches or 4D % Up to 0.249, incl 75.0 67.0 6 0.250 to 0.499 78.0 69.0 7 0.500
22、to 0.999 79.0 71.0 7 1.000 to 3.000 80.0 72.0 7 TABLE 2B - MINIMUM LONGITUDINAL TENSILE PROPERTIES, SI UNITS Nominal Thickness Millimeters TensileStrengthMPa Yield Strengthat 0.2% OffsetMPa Elongation in 50.8 mm or 4D % Up to 6.32, incl 517 462 6 Over 6.35 to 12.67 538 476 7 Over 12.70 to 25.37 545
23、490 7 Over 25.40 to 76.20 552 496 7 3.4.2 Exfoliation Corrosion Resistance Specimens cut from extrusions shall not exhibit exfoliation corrosion at a T/10 plane greater than that illustrated by Photo 2 (EB) from Figure 2 of ASTM G 34 when specimens are exposed for 2 weeks according to the procedures
24、 in ASTM G 85 Annex A2, using the dry-bottom MASTMAASIS Test Method. The solution used for exposure by ASTM G 34, the EXCO Test, has been determined to be inappropriate for Al-Li alloys. (See note 8.4) 3.4.3 Stress Corrosion Cracking When specified, specimens from extrusions with section thickness 0
25、.750 inches (19.05 mm) and greater tested in accordance with ASTM G 47, shall show no evidence of stress corrosion cracking when stressed in the short transverse direction (perpendicular to grain flow) to 35 ksi (241 MPa). SAE INTERNATIONAL AMS4287A Page 4 of 5 3.5 Quality Products, as received by p
26、urchaser, shall be uniform in quality and condition, sound and free from foreign materials and from conditions detrimental to usage of the extrusions. 3.5.1 When specified, each extrusion shall be subjected to ultrasonic inspection in accordance with ASTM B 594. Extrusions, 0.500 inch (12.7 mm) and
27、over in nominal diameter or least distance between parallel sides, weighing 600 pounds (272 kg) and under shall meet ultrasonic Class B requirements, as described in ASTM B 594. 3.6 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS
28、4.1 Responsibility for Inspection The vendor of the products 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 products conf
29、orm to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), longitudinal tensile properties (3.4.1), tolerances (3.6), and ultrasonic inspection, when specified (3.5.1), are acceptance tests and, except for composition, shall be performed on each inspection l
30、ot. 4.2.2 Periodic Tests Exfoliation corrosion resistance (3.4.2), and stress corrosion cracking (3.4.3) 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 AMS 235
31、5. 4.4 Reports The vendor of product shall furnish with each shipment a report stating that the product conforms to the composition, ultrasonic inspection when required, and tolerances and showing the numerical results of tests on each inspection lot to determine conformance to the other acceptance
32、test requirements and stating that the final product conforms to the other technical requirements. This report shall include the purchase order number, inspection lot number, AMS 4287A, size or section identification number, and quantity. The report shall also identify the producer and the size of t
33、he mill product. 4.5 Resampling and Retesting Shall be in accordance with AMS 2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance with ASTM B 666/B 666M. SAE INTERNATIONAL AMS4287A Page 5 of 5 5.2 Packaging Products shall be prepared for shipment in accordance with ASTM B 660
34、 and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT A vendor shall include this specification number and its revision letter in all quotations and when ackn
35、owledging purchase orders. 7. REJECTIONS Products not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions,
36、not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that
37、contain editorial changes only. 8.2 Alloy 2099, any temper, will have Electrical Conductivity (EC) of approximately 18% IACS. 8.3 The circumscribing circle diameter is the diameter of the smallest circle, which completely encloses the cross section of the as-extruded product. 8.4 The solution used f
38、or exposure by ASTM G 34, the EXCO Test, has been determined to be inappropriate for Al-Li alloys. For further information on this review ASTM G 112 paragraph 6.3.1 which describes limitations on this test method for Al-Li alloys. 8.5 For thinner material, minimize solution heat treat soak times to
39、avoid Lithium depletion. Product should be limited to one re-solution heat treatment. 8.6 Terms used in AMS are clarified in ARP1917. 8.7 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are
40、shown as the approximate equivalents of the primary units and are presented only for information. 8.8 Purchase documents should specify not less than the following: AMS 4287A Form and size or section identification of extrusions desired Quantity of extrusions desired Specify if ultrasonic testing is required. PREPARED BY AMS COMMITTEE “D”
