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 theref
2、rom, 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 2012 SAE InternationalAll rights reserved. No part of this publication may b
3、e 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 USA)Fax
4、: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMS4459AAEROSPACEMATERIALSPECIFICATIONAMS4459 REV. AIssued 2012-03Revised 2013-01Superseding AMS4459Alumi
5、num Alloy, Extrusion2.7Cu - 1.8Li - 0.7Zn - 0.3Mn - 0.3Mg - 0.08Zr (2099-T81)Solution Heat Treated, Stress Relieved by Stretching 1 to 3% and AgedRATIONALEAMS4459A results from a Limited Scope Ballot to clarify requirements for fracture toughness testing (3.4.2).1. SCOPE1.1 FormThis specification co
6、vers an aluminum alloy in the form of extruded bars, rods, and profiles (shapes) produced with cross sectional area of 22.5 square inches (145 cm2) maximum and a circumscribing circle diameter (circle size) of 17.4 inches (44.2 cm) maximum. See 8.3 for definition of circumscribing circle size.1.2 Ap
7、plicationThese extrusions have been used typically for machined parts requiring high strength with high toughness but usage is not limited to such applications.1.3 Certain processing procedures may cause this product to become susceptible to stress-corrosion cracking; ARP823recommends practices to m
8、inimize such conditions.2. APPLICABLE DOCUMENTSThe 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 document unless a specific document issue is specifie
9、d. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply.SAE AMS4459A Page 2 of 62.1 SAE DocumentsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (in
10、side 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 RingsAMS2772 Heat Treatment of Aluminum Alloy Raw MaterialsARP823 Minimiz
11、ing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy ProductsAS1990 Aluminum Alloy Tempers2.2 ASTM PublicationsAvailable 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 594 Ultrasonic Inspection
12、 of Aluminum-Alloy Wrought Products for Aerospace ApplicationsASTM B 660 Packaging/Packing of aluminum and Magnesium Products.ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium ProductsASTM E 1004 Determining Electrical Conductivity Using the Electromagnetic (Eddy-Current) MethodASTM
13、 G 34 Exfoliation Corrosion Susceptibility in 2xxx and 7xxx Aluminum Alloys (EXCO Test)ASTM G 47 Determining Susceptibility to Stress-Corrosion Cracking of 2XXX and 7XXX Aluminum Alloy ProductsASTM G 85 Modified Salt Spray (Fog) Testing, Annex A2 (cyclic acidified salt spray test - dry bottom MASTMA
14、ASIS)2.3 ANSI PublicationsAvailable 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 ProductsANSI H 35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)3. TECHNICA
15、L REQUIREMENTS3.1 CompositionShall conform to the percentages by weight shown in Table 1, determined in accordance with AMS2355.SAE AMS4459A Page 3 of 6TABLE 1 - COMPOSITIONElement min maxSilicon - 0.05Iron - 0.07Copper 2.4 3.0Manganese 0.10 0.50Magnesium 0.10 0.50Zinc 0.4 1.0Titanium - 0.10Lithium
16、1.6 2.0Zirconium 0.05 0.12Beryllium - 0.0001Other impurities - each - 0.05Other impurities - total - 0.15Aluminum Remainder3.2 ConditionExtruded, solution heat-treated and stress-relieved by stretching to produce a nominal permanent set of 1 to 3% (target of 2%) and then artificially aged to T81 (Se
17、e AS1990).3.2.1 Product shall be supplied with an as-extruded surface finish; light polishing to remove minor surface conditions is permissible provided such conditions can be removed within specified dimensional tolerances.3.2.2 Product may receive minor straightening, after stretching, of an amoun
18、t necessary to meet the requirements of 3.6.3.3 Heat Treatment3.3.1 Heat Treatment procedures shall be in accordance with the requirements of AMS2772 and the following:3.3.1.1 Solution Heat Treatment Temperature960 to 1020 F (516 to 549 C).3.3.1.2 Aging Heat TreatmentHeat to 250 F 10 (121 C 6), hold
19、 at temperature for a time of 10 to 14 hours, then heat to 305 F 10 (152 C 6), hold at temperature for a time of 14 to 19 hours, and air cool.3.4 PropertiesProduct shall conform to the following requirements, determined in accordance with AMS2355 on the mill product size:3.4.1 Tensile Properties sha
20、ll be as shown in Table 2A and 2B.TABLE 2A - MINIMUM LONGITUDINAL TENSILE PROPERTIES, INCH/POUND UNITSNominal ThicknessInchesTest DirectionTensileStrengthksiYield Strengthat 0.2% OffsetksiElongation in2 inches or 4D%0.375 to 1.300 incl L 73.0 59.0 7LT 63.0 51.0 7SAE AMS4459A Page 4 of 6TABLE 2B - MI
21、NIMUM LONGITUDINAL TENSILE PROPERTIES, SI UNITSNominal ThicknessMillimetersTestDirectionTensileStrengthMPaYield Strengthat 0.2% OffsetMPaElongation in50.8 mm or 4D%9.53 to 33.02 L 503 407 7LT 434 352 73.4.2 Fracture ToughnessWhen required by purchaser (See 8.8) plane strain fracture toughness shall
22、be tested in the L-T orientation in accordance with ASTM E 399 and ASTM B 645. The test specimens shall meet the following requirements. 3.4.2.1 For material 0.750 to 1.300 inches (19.05 to 33.02 mm) thick use a test specimen having a width (W) of 3.0 inches (76.2 mm) and a thickness (B) of full ext
23、rusion thickness. When allowed by the profile shape, the test specimen (especially the pre-crack and crack path) shall be located away from junctions and other areas in the extruded shape with mixed grain flow.3.4.2.2 A valid KIcmeeting the requirements of ASTM E 399 or a KQ“usable for lot release”
24、in accordance with ASTM B 645 shall meet or exceed the values shown in Table 3.3.4.2.3 For material less than 0.750 inch (19.05 mm) thick, when required by customer, sample size, sample geometryand test method shall be agreed upon by customer and supplier.TABLE 3 - FRACTURE TOUGHNESS PARAMETERSNomin
25、al ThicknessInchesNominal ThicknessMillimetersSpecimenOrientationMinimum KIc Minimum KIcMPag3g151m 0.500 to 1.300, incl Over 12.70 to 33.02, incl L-T 45 493.4.3 Exfoliation Corrosion ResistanceSpecimens cut from extrusions shall not exhibit exfoliation corrosion at a T/10 plane greater than that ill
26、ustrated by Photo 2(EB) from Figure 2 of ASTM 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. The solution used for exposure by ASTM G 34, the EXCO Test, has been determined to be inappropriate for Al-Li allo
27、ys (See 8.4).3.4.4 Stress Corrosion CrackingSpecimens from extrusions with section thickness 0.750 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 long transverse direction (perpendicular to grain flow) to 38
28、.4 ksi (265 MPa).3.5 QualityProducts, as received by purchaser, 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 required by purchaser (See 8.8), each extrusion shall be subjected to ultrasonic insp
29、ection in accordance with ASTM B 594. Extrusions, 0.500 inch (12.7 mm) and 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 TolerancesShall conform to all applicable re
30、quirements of ANSI H35.2 or ANSI H35.2M.ksi inchSAE AMS4459A Page 5 of 64. QUALITY ASSURANCE PROVISIONS4.1 ResponsibilityThe 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 an
31、d to perform any confirmatory testing deemed necessary to ensure that the products conform to specified requirements.4.2 Classification of Tests4.2.1 Acceptance TestsComposition (3.1), longitudinal tensile properties (3.4.1), tolerances (3.6), and when required by customer, fracture toughness (3.4.2
32、), and when specified, ultrasonic inspection, (3.5.1), are acceptance tests and, except for composition, shall be performed on each lot.4.2.2 Periodic TestsExfoliation corrosion resistance (3.4.3), and stress corrosion cracking (3.4.4) are periodic tests and shall be performed at afrequency selected
33、 by the vendor unless frequency of testing is specified by purchaser.4.3 Sampling and TestingShall be in accordance with AMS2355.4.4 ReportsThe vendor of product shall furnish with each shipment a report stating that the product conforms to the chemical composition, ultrasonic inspection when requir
34、ed, and tolerances and showing the numerical results of tests on each inspection lot to determine conformance to the other acceptance test requirements and stating that the final product conforms to the other technical requirements. This report shall include the purchase order number, inspection lot
35、 number, AMS4459A, size or section identification number, and quantity. The report shall also identify the producer and the size of the mill product.4.5 Resampling and RetestingShall be in accordance with AMS2355.5. PREPARATION FOR DELIVERY5.1 IdentificationShall be in accordance with ASTM B 666/B 6
36、66M.5.2 PackagingProducts shall be prepared for shipment in accordance with ASTM B 660 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. ACKNOWLEDGEMENTA vendor shall ment
37、ion this specification number and its revision letter in all quotations and when acknowledging purchase orders.SAE AMS4459A Page 6 of 67. REJECTIONSProducts not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES8.1 A change bar (|) lo
38、cated 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 re
39、visions. Change bars and (R) are not used in original publications, nor in documents that 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 c
40、ompletely encloses the cross section of the as-extruded product.8.4 The solution used for 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 which describes limitations on this test method for Al-Li alloy
41、s.8.5 For thinner material, minimize solution heat treat soak times to 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; di
42、mensions and properties in SI units and the Celsius temperatures are 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:AMS4459AForm and size or section identification of extrusions desiredQuantity of extrusions desiredSpecify if ultrasonic testing is requiredSpecify if fracture toughness testing is required.PREPARED BY AMS COMMITTEE “D”
