1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSX EOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDO 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 therefrom, LVWKHVROHUHVSR
2、QVLELOLWRIWKHXVHU 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 2016 SAE International All rights reserved. No part of this publication may be reproduced,
3、 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: 724-776-
4、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/AMS4298A AEROSPACE MATERIAL SPECIFICATION AMS4298 REV. A Issued 2004-07 Reaffirmed 2010-05 Revised 2016-04 Sup
5、erseding AMS4298 Aluminum Alloy, Alclad Sheet 3.8Cu 1.0Mg 0.30Mn 0.60Zn (Alclad 2056-T3) Solution Heat Treated and Cold Worked RATIONALE AMS4298A revises Composition (Tables 1, 2), Condition (3.2), Properties (3.3.5) and Reports (4.4.1) and is a Five Year Review and update of this specification. 1.
6、SCOPE 1.1 Form This specification covers an aluminum alloy in the form of sheet 0.063 to 0.236 inch (1.60 to 6.00 mm), incl, in thickness, clad on both sides (see 8.4). 1.2 Application These products have been used typically for formed structural aircraft parts requiring improved resistance to fatig
7、ue crack growth and high toughness with strength similar to Alclad 2024-T3, but usage is not limited to such applications. 1.2.1 Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking; ARP823 recommends practices to minimize such conditio
8、ns. 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 document unless a specific document issue is specified. When the referen
9、ced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE INTERNATIONAL AMS4298A Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (i
10、nside USA and Canada) or +1 724-776-4970 (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 Raw Materials ARP823
11、 Minimizing Stress-Corrosion Cracking in Wrought Heat-Treatable Aluminum Alloy Products 2.2 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 B660 Packaging/Packing of Aluminum and Magnes
12、ium Products ASTM B666/B666M Identification Marking of Aluminum and Magnesium Products ASTM E647 Measurement of Fatigue Crack Growth Rates 2.3 ANSI Accredited Publications Copies of these documents are available online at http:/webstore.ansi.org/. ANSI H35.1/H35.1M Alloy and Temper Designation Syste
13、ms for Aluminum ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Tables 1 and 2, determined in accordance with AMS2355. Tab
14、le 1 Composition, core (2056) Element min max Silicon - 0.10 Iron - 0.12 Copper 3.3 4.3 Manganese 0.10 0.50 Magnesium 0.6 1.4 Zinc 0.40 0.8 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS4298A Page 3 of 6 Table 2 Composition, cladding (1050) Element
15、min max Silicon - 0.25 Iron - 0.40 Copper - 0.05 Manganese - 0.05 Magnesium - 0.05 Zinc - 0.05 Titanium - 0.03 Vanadium - 0.05 Other Elements, each - 0.03 Aluminum, by difference 99.50 - 3.2 Condition Solution heat treated in accordance with AMS2772 and cold worked and naturally aged to T3 temper (s
16、ee ANSI H35.1/H35.1M). 3.3 Properties Product shall conform to the following requirements, determined on the mill product size in accordance with AMS2355. 3.3.1 Long-Transverse Tensile Properties Shall be as shown in Table 3. Table 3A Minimum tensile properties, inch/pound units Nominal Thickness In
17、ches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation in 2 inches or 4D % 0.063 to 0.126, incl 62.0 41.0 15 Over 0.126 to 0.236, incl 62.0 40.0 16 Table 3B Minimum tensile properties, SI units Nominal Thickness Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elong
18、ation in 50.8 mm or 4D % 1.60 to 3.25, incl 427 283 15 Over 3.25 to 6.00, incl 427 276 16 3.3.2 Fatigue Crack Growth Rate (FCGR) Shall be not higher than the rate (da/dN) shown in Table 4, determined in the T-L orientation in accordance with ASTM E647, and using the center-cracked tension M(T) speci
19、men, a K (Delta K) of 40 ksi (44 MPa ), a K gradient of zero, a stress ratio (R) of plus 0.1, and a testing frequency between 2 to 10 Hertz. Table 4 Maximum fatigue crack growth rate Nominal Thickness Inch Nominal Thickness Millimeters da/dN inch/cycle da/dN mm/cycle 0.063 to 0.236, incl 1.60 to 6.0
20、0, incl 1.2 x 10-4 3.05 x 10-3 SAE INTERNATIONAL AMS4298A Page 4 of 6 3.3.3 Bending Product shall withstand, without cracking, bending at room temperature through an angle of 180 degrees around a diameter equal to the bend factor shown in Table 5 times the nominal thickness of the product with axis
21、of bend parallel to the direction of rolling. Table 5 Bending parameters Nominal Thickness Inch Nominal Thickness Millimeters Bend Factor 0.063 to 0.128, incl 1.60 to 3.25, incl 4 Over 0.128 to 0.236, incl Over 3.25 to 6.00, incl 5 3.3.4 Minimum Average Cladding Thickness Shall be as shown in Table
22、6. Table 6 Minimum average cladding thickness Nominal Thickness Inch Nominal Thickness Millimeters Cladding Thickness Per Side % of Total Thickness 0.063 to 0.236, incl 1.60 to 6.0, incl 2.0 3.3.5 Property requirements for product outside the range covered by 1.1 shall be agreed upon between purchas
23、er and producer. 3.4 Quality Product, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage of the product. 3.5 Tolerances Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. Q
24、UALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection 7KHSURGXFHURIWKHSURGXFWVKDOOVXSSODOOVDPSOHVIRUSURGXFHUVWHVWVDQGVKDOOEH UHVSRQVLEOHIRUWKHSHUIRUPDQFHRIDO l required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the p
25、roduct conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.3.1), fatigue-crack growth rate (3.3.2), and tolerances (3.5) are acceptance tests and, except for composition, shall be performed on each inspection lot. 4.2.2 Peri
26、odic Tests Bending (3.3.3) and cladding thickness (3.3.4) are periodic tests and shall be performed at a frequency selected by the producer unless frequency of testing is specified by purchaser. SAE INTERNATIONAL AMS4298A Page 5 of 6 4.3 Sampling and Testing Shall be in accordance with AMS2355. One
27、chemical composition analysis shall be determined for each ingot casting drop and one fatigue crack growth test shall be performed on each inspection lot. 4.4 Reports The producer of the product shall furnish with each shipment a report stating that the product conforms to the composition and tolera
28、nces and showing the numerical results of tests for tensile properties and fatigue crack growth of each inspection lot and stating that the product conforms to the other technical requirements. This report shall include the identity of the producer, purchase order number, inspection lot number, AMS4
29、298A, size and quantity of the mill product. 4.4.1 When the product size is outside the range covered by 1.1, the report shall contain a statement to that effect. 4.5 Resampling and Retesting Shall be in accordance with AMS2355. 5. PREPARATION FOR DELIVERY 5.1 Identification Shall be in accordance w
30、ith ASTM B666/B666M. 5.2 Packaging 5.2.1 Product shall be protected from damage during storage and shipment by a method determined by producer unless specified by purchaser. Examples of typical protective methods include but are not limited to interleaving with paper or oiling of the surface. 5.2.2
31、Product shall be prepared for shipment in accordance with ASTM B660 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 producer shall mention this specifi
32、cation number in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 Revision Indicator A change bar (l) located in the left margin is for the conven
33、ience 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 revisions. Change bars and (R) are not used
34、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 and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown
35、as the approximate equivalents of the primary units and are presented only for information. SAE INTERNATIONAL AMS4298A Page 6 of 6 8.4 Purchase documents should specify not less than the following: AMS4298A Size of sheet desired. Quantity of sheet desired Property and acceptance requirements from the cognizant engineering organization applicable to sizes outside the range listed in 1.1. PREPARED BY AMS COMM,77(
