SAE AMS 4341E-2006 Aluminum Alloy Extrusions 6 2Zn - 2 3Cu - 2 2Mg - 0 12Zr (7050-T73511) Solution Heat Treated Stress Relieved by Stretching Straightened and Overaged (UNS A97050).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 2011 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/AMS4341E AEROSPACE MATERIAL SPECIFICATION AMS 4341 REV. E Issued 1978-04 Revised

5、2006-09 Reaffirmed 2011-11 Superseding AMS 4341D Aluminum Alloy, Extrusions 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (7050-T73511) Solution Heat Treated, Stress Relieved by Stretching, Straightened, and Overaged (Composition similar to UNS A97050) RATIONALE This document has been reaffirmed to comply with the

6、 SAE five-year review policy. 1. SCOPE 1.1 Form This specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles, and tubing. 1.2 Application These extrusions have been used typically for structural applications requiring a combination of high mechanical properties and

7、good resistance to stress-corrosion cracking, but usage is not limited to such applications. 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 subseque

8、nt revision of a document 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 Driv

9、e, Warrendale, PA 15096-0001, 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 T

10、reatment of Aluminum Alloy Raw Materials ARP1917 Clarification of Terms Used in Aerospace Materials Specifications SAE AMS 4341E Page 2 of 5 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.or

11、g. ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products ASTM G 34 Exfoliation Corrosion Susceptibility in 2XXX and 7XX

12、X Series Aluminum Alloys (EXCO Test) ASTM G 47 Determining Susceptibility to Stress-Corrosion Cracking of 2xxx and 7xxx Aluminum Alloys 2.3 ANSI Publications 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 Di

13、mensional Tolerances for Aluminum Mill Products ANSI H 35.2M Dimensional Tolerances for Aluminum Mill Products (Metric) 3. TECHNICAL REQUIREMENTS 3.1 Composition Shall conform to the percentages by weight shown in Table 1, determined in accordance with AMS 2355. TABLE 1 - COMPOSITION Element min max

14、 Silicon - 0.12 Iron - 0.15 Copper 2.0 2.6 Manganese - 0.10 Magnesiun 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 Aluminum remainder 3.2 Condition Solution heat treated, stress relieved by stretching to produce a n

15、ominal permanent set of 1.5%, but not less than 1% nor more than 3%, and overaged to the T73511 temper. 3.2.1 Extrusions may receive minor straightening, after stretching, of an amount necessary to meet the requirements of 3.6. 3.2.2 Extrusions shall be supplied with an as-extruded surface finish; l

16、ight polishing to remove minor surface imperfections is permissible provided such imperfections can be removed within specified dimensional tolerances. SAE AMS 4341E Page 3 of 5 3.3 Heat Treatment Shall be performed as follows; heat treatment shall be in accordance with AMS 2772: 3.3.1 Solution Heat

17、 Treatment: In accordance with AMS 2772. 3.3.2 Overaging Heat Treatment Recommended practice is heating to 250 F 5 (121 C 3), holding at heat for not less than 4 hours, further heating to 345 F 10 (174 C 6), holding at heat for not less than 8 hours, and cooling in air. 3.4 Properties Extrusions, 5.

18、000 inches (127.00 mm) and under in nominal diameter or thickness (wall thickness of tubing) and 32 square inches (206 cm2) and under in cross-sectional area, shall conform to the following requirements, determined in accordance with AMS 2355: on the mill produced size. 3.4.1 Tensile Properties Shal

19、l be as shown in Table 2 for specimens taken in the longitudinal direction: TABLE 2 - MINIMUM LONGITUDINAL TENSILE PROPERTIES Property Value Tensile Strength 70.0 ksi (483 MPa) Yield Strength at 0.2% Offset 60.0 ksi (414 MPa) Elongation in 4D 5D 8% 7% 3.4.2 Corrosion Resistance Resistance to stress-

20、corrosion cracking and to exfoliation-corrosion shall be acceptable if the extrusions conform to the requirements of 3.4.1 and of 3.4.2.1.2 or 3.4.2.1.3. 3.4.2.1 Electrical Conductivity/Mechanical Property Relationship 3.4.2.1.1 Electrical conductivity shall be not lower than 40.0% IACS (Internation

21、al Annealed Copper Standard) (23.2 MS/m), determined on the samples used for tensile testing. 3.4.2.1.2 If electrical conductivity is 41.0% IACS (23.8 MS/m) or higher and tensile properties meet the requirements of 3.4.1, the extrusions are acceptable. 3.4.2.1.3 If electrical conductivity is at leas

22、t 40.0% IACS (23.2 MS/m) but not greater than 40.9% (23.7 MS/m) and longitudinal yield strength does not exceed 69.0 ksi (476 MPa), the extrusions are acceptable. 3.4.2.1.4 If electrical conductivity is less than 41.0% IACS (23.8 MS/m) and the longitudinal yield strength exceeds 69.0 ksi (476 MPa),

23、the extrusions are not acceptable and may be given additional overaging heat treatment. If upon completion of such treatment, extrusions conform to 3.4.2.1.2 and/or 3.4.2.1.3, they are acceptable. 3.4.2.2 Exfoliation Corrosion Resistance Specimens, cut from extrusions, shall exhibit exfoliation corr

24、osion when tested per ASTM G 34, at a T/10 plane, not greater than that illustrated by Photo EB, Figure 2, of ASTM G 34. SAE AMS 4341E Page 4 of 5 3.4.2.3 Stress-Corrosion Resistance Specimens, cut from extrusions 0.750 inch (19.05 mm) and over in nominal diameter or section thickness, shall show no

25、 evidence of stress-corrosion cracking when stressed in the short-transverse (perpendicular to grain flow) direction at 45.0 ksi (310 MPa) when tested per ASTM G 47. 3.5 Quality Extrusions, as received by purchaser, shall be uniform in quality and condition, sound, and free from foreign materials an

26、d from imperfections detrimental to usage of the extrusions. 3.5.1 Each bar, rod, and profile shall be subjected to ultrasonic inspection in accordance with ASTM B 594 and shall meet the requirements shown in Table 3A or 3B. TABLE 3A - ULTRASONIC REQUIREMENTS Nominal Thickness Inches Maximum Weightp

27、er Piece Pounds Discontinuity Class 0.500 to 1.500, excl 600 B 1.500 to 5.000, incl 600 A TABLE 3B - ULTRASONIC REQUIREMENTS (SI) Nominal Thickness Millimeters Maximum Weightper Piece Kilograms Discontinuity Class 12.70 to 38.10, excl 272 B 38.10 to 127.00, incl 272 A 3.6 Tolerances Shall conform to

28、 all applicable requirements of ANSI H35.2 or ANSI H35.2M. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of extrusions shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample

29、and to perform any confirmatory testing deemed necessary to ensure that the extrusions conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Composition (3.1), tensile properties (3.4.1), corrosion resistance by conductivity/tensile property relationship (3.4.2.1), ul

30、trasonic soundness (3.5.1), and tolerances (3.6) are acceptance tests and, except for composition, shall be performed on each lot. 4.2.2 Periodic Tests Exfoliation-corrosion resistance (3.4.2.2) and stress-corrosion resistance (3.4.2.3) are periodic tests and shall be performed at a frequency select

31、ed by vendor unless frequency of testing is specified by purchaser. 4.3 Sampling and Testing Shall be in accordance with AMS 2355. SAE AMS 4341E Page 5 of 5 4.4 Reports The vendor of extrusions shall furnish with each shipment a report stating that the extrusions conform to the composition, ultrason

32、ic inspection, 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, AMS 4341E, size or section identification number, and quanti

33、ty. The report shall also identify the producer, the mill product form, and the mill produced size. 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 Packaging Shall be in accordance wi

34、th ASTM B 660. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Extrusions not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection

35、. 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, not 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

36、the specification, including technical revision. Change bars and (R) are not used in original publications, nor in specifications 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

37、 primary; dimensions 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. 8.4 Purchase documents should specify not less than the following: AMS 4341E Form and size or section identification number of extrusions desired Quantity of extrusions desired. PREPARED BY AMS COMMITTEE “D”