SAE AMS 4243B-2003 Aluminum Alloy Alclad Sheet 6 2Zn - 2 3Cu - 2 2Mg - 0 12Zr (Alclad 7050-T76) Solution Heat Treated and Overaged (UNS A87050)《UNS A87050经溶液热处理和沉淀的6 2Zn-2 3Cu-2 2M.pdf

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 2014 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/AMS4243B AEROSPACE MATERIAL SPECIFICATION AMS4243 REV. B Issued 1998-10 Revised 2

5、003-08 Reaffirmed 2014-04 Superseding AMS4243A Aluminum Alloy, Alclad Sheet 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (Alclad 7050-T76) Solution Heat Treated and Overaged (Composition similar to UNS A87050) RATIONALE AMS4243B has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE: 1.1 For

6、m: This specification covers an aluminum alloy in the form of sheet. 1.2 Application: This sheet has been used typically for applications requiring a high level of mechanical properties and good resistance to exfoliation corrosion, but usage is not limited to such applications. 2. APPLICABLE DOCUMEN

7、TS: 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 referenced document has been ca

8、ncelled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or www.sae.org. AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Al

9、loys, Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings AMS 2772 Heat Treatment of Aluminum Alloy Raw Material AS1990 Aluminum Alloy Tempers SAE INTERNATIONAL AMS4243B Page 2 of 6 2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA

10、 19428-2959 or www.astm.org. ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM B 666/B 666M Identification of Aluminum and Magnesium Alloy Products ASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XXX Series Aluminum Alloys (EXCO Test) 2.3 ANSI Publications: Available f

11、rom ANSI, 25 West 43rd Street, New York, NY 10036 or www.ansi.org. 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 Table

12、s 1 and 2, determined in accordance with AMS 2355. TABLE 1 - Composition, Core (7050) Element min max Silicon - 0.12 Iron - 0.15 Copper 2.0 2.6 Manganese - 0.10 Magnesium 1.9 2.6 Chromium - 0.04 Zinc 5.7 6.7 Titanium - 0.06 Zirconium 0.08 0.15 Other Elements, each - 0.05 Other Elements, total - 0.15

13、 Aluminum remainder SAE INTERNATIONAL AMS4243B Page 3 of 6 TABLE 2 - Composition, Cladding (7072) Element min max Silicon + iron - 0.7 Copper - 0.10 Manganese - 0.10 Magnesium - 0.10 Zinc 0.8 1.6 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder 3.2 Condition: Solution heat

14、 treated and overaged to the T76 temper (See AS1990 and 8.2). Solution and precipitation heat treatment shall be performed in accordance with AMS 2772. 3.3 Properties: Shall conform to the following requirements, determined in accordance with AMS 2355 on the mill product: 3.3.1 Tensile Properties: S

15、hall be as specified in Table 3. Tensile properties shall be determined in the long-transverse direction and, when specified, in the longitudinal direction. TABLE 3A - Minimum Tensile Properties, Inch/Pound Units Nominal Thickness Inches Specimen Orientation Tensile Strength ksi Yield Strengthat 0.2

16、% Offset ksi Elongation in 2 inches or 4D %, min 0.040 to 0.062, incl Longitudinal 69.0 64.0 - Long Trans. 72.0 61.0 7 Over 0.062 to 0.126, incl Longitudinal 71.0 66.0 - Long Trans. 73.0 66.0 7 Over 0.126 to 0.187, incl Longitudinal 75.0 69.0 - Long Trans. 75.0 68.0 7 TABLE 3B - Minimum Tensile Prop

17、erties, SI Units Nominal Thickness Millimeters Specimen Orientation Tensile Strength MPa Yield Strengthat 0.2% Offset MPa Elongation in 50.8 mm or 4D %, min 1.02 to 1.57, incl Longitudinal 476 441 - Long Trans. 496 421 7 Over 1.57 to 3.20, incl Longitudinal 490 455 - Long Trans. 503 455 7 Over 3.20

18、to 4.75, incl Longitudinal 517 476 - Long Trans. 517 469 7 SAE INTERNATIONAL AMS4243B Page 4 of 6 3.3.2 Exfoliation Corrosion Resistance: Sheet, after removal of cladding, shall achieve exfoliation rating of EB or better, as illustrated by Figure 2 in ASTM G34, at the T/10 plane. 3.3.3 Cladding Thic

19、kness: After rolling, the average cladding thickness on each side shall be as shown in Table 4. TABLE 4 - Average Cladding Thickness Total Thickness of Composite Product Inch Total Thickness of Composite Product Millimeters Cladding Thickness Each Side % Total Thickness, Minimum Cladding Thickness E

20、ach Side % Total Thickness, Minimum 0.040 to 0.063, excl 1.02 to 1.60, excl 3.2 4 0.063 to 0.188, excl 1.60 to 4.78, excl 2 2.5 3.4 Quality: Sheet, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials and from imperfections detrimental to usage

21、of the sheet. 3.5 Tolerances: Shall conform to all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The vendor of sheet shall supply all samples for vendors tests and shall be responsible for the performance of all required tes

22、ts. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the sheet conforms to specified requirements. 4.2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.1), long-transverse tensile properties (3.3.1), when specified, longitu

23、dinal tensile properties (3.3.1) and tolerances (3.5) 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) and cladding thickness (3.3.3) are periodic tests and shall be performed at a frequency se

24、lected by the vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing: Shall be in accordance with AMS 2355. SAE INTERNATIONAL AMS4243B Page 5 of 6 4.4 Reports: The vendor of sheet shall furnish with each shipment a report stating that the sheet conforms to the chemica

25、l composition and tolerances, 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), AMS 4243B, size, and quantity. The report shall also iden

26、tify the producer, the product form, and the size of the 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. 5.2 Protective Treatment: Product shall be protected from damage

27、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 surface. 5.3 Packaging: The product shall be prepared for shipment in accordance with ASTM B 660

28、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 mention this specification number and its revision letter in all quotations and when ackn

29、owledging purchase orders. 7. REJECTIONS: Sheet not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES: 8.1 A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, n

30、ot editorial changes, have been made to the previous issue of a specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revision. Change bars and (R) are not used in original publications, nor in specifications that conta

31、in editorial changes only. SAE INTERNATIONAL AMS4243B Page 6 of 6 8.2 Actual overaging heat treatments may be proprietary. 8.3 Terms used in AMS are clarified in ARP1917. 8.4 Dimensions and properties in inch/pound units are primary; dimensions and properties in SI units are shown as the approximate

32、 equivalents of the primary units and are presented only for information. 8.5 Purchase documents should specify not less than the following: AMS 4243B Size of product desired Quantity of product desired If longitudinal tensile testing is required. 8.6 Key Words: Aluminum alloy, sheet, solution heat treated and overaged, 7050-T76, UNS A87050 PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D“