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/AMS4331 AEROSPACE MATERIAL SPECIFICATION AMS4331 Issued 2003-10 Reaffirmed 2014-0
5、5 Aluminum Alloy Extrusions 7.8Zn - 2.6Mg - 2.0Cu - 0.10Zr - (7068-T6511) Solution Heat Treated, Stress Relieved, and Precipitation Heat Treated RATIONALE This document has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE: 1.1 Form: This specification covers an aluminum alloy
6、 in the form of extruded bars, rods, shapes (profiles), and tubing. 1.2 Application: These extrusions have been used typically for structural parts requiring a combination of high tensile strength and moderate fatigue strength, but usage is not limited to such applications. 1.2.1 Certain design and
7、processing procedures may cause these products to become susceptible to stress-corrosion 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
8、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 canceled and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publi
9、cations: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or www.sae.org. AMS 2355 Quality Assurance Sampling and Testing of Aluminum Alloys and Magnesium Alloys, Wrought Products, Except Forging Stock, and Rolled, Forged or Flash Welded Rings AMS 2772 Heat Treatment of Aluminu
10、m Alloy Raw Materials SAE INTERNATIONAL AMS4331 Page 2 of 5 2.1 (Continued): ARP823 Minimizing Stress-Corrosion in Wrought Heat-Treatable Aluminum Alloy Products AS1990 Aluminum Alloy Tempers 2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or www.a
11、stm.org. 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. 2.3 ANSI Publications: Available from ANSI, 25 West 43r
12、dStreet, 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 1, determined in acc
13、ordance with AMS 2355: Table 1 Composition Element min max Silicon - 0.12 Iron - 0.15 Copper 1.6 2.4 Manganese - 0.10 Magnesium 2.2 3.0 Chromium - 0.05 Zinc 7.3 8.3 Titanium - 0.10 Zirconium 0.05 0.15 Other Elements, each - 0.05 Other Elements, total - 0.15 Aluminum remainder SAE INTERNATIONAL AMS43
14、31 Page 3 of 5 3.2 Condition: Extruded, solution heat treated, and stress relieved by stretching to produce a nominal permanent set of 1.5%, but not less than 1% nor more than 3%, and precipitation heat treated to the T6511 temper (see AS1990). Heat treatment shall be in accordance with AMS 2772. 3.
15、2.1 Extrusions may receive minor straightening, after stretching, of an amount necessary to meet the requirements of 3.5. 3.2.2 Extrusions shall be supplied with an as-extruded surface finish; light polishing to remove minor surface imperfections is permissible provided such imperfections can be rem
16、oved within the dimensional tolerance. 3.3 Properties: Extrusions shall conform to the following requirements, determined in accordance with AMS 2355 on the mill produced size. 3.3.1 Longitudinal Tensile Properties: Shall be as shown in Table 2A/2B. Table 2A Minimum Longitudinal Tensile Properties,
17、Inch/Pound Units Nominal Diameter or Least Thickness(bars, rods, wire, profiles) or Nominal Wall Thickness (tubing) inches Tensile Strength ksi Yield Strength at 0.2% Offset ksi Elongation 4D % 0.250 to 3.000, incl 99.0 95.0 5 Table 2B Minimum Longitudinal Tensile Properties, SI Units Nominal Diamet
18、er or Least Thickness(bars, rods, wire, shapes) or Nominal Wall Thickness (tubing) Millimeters Tensile Strength MPa Yield Strength at 0.2% Offset MPa Elongation 4D % 6.35 to 76.20 683 655 5 3.4 Quality: Extrusions, as received by purchaser, shall be uniform in quality and condition, sound, and free
19、from foreign materials and from conditions detrimental to usage of the extrusions. Any detrimental conditions found during the customers manufacturing process are subject to rejection. 3.4.1 When specified, extrusions 0.500 inch (12.70 mm) and over in nominal diameter or least distance between paral
20、lel sides, shall be subjected to ultrasonic inspection in accordance with ASTM B594. Standards for acceptance shall be as shown in Table 3. SAE INTERNATIONAL AMS4331 Page 4 of 5 TABLE 3 Ultrasonic Class Requirements Nominal ThicknessInches Nominal ThicknessMillimeters Ultrasonic Class 0.500 to 1.500
21、, excl 12.70 to 38.10, excl B 1.500 to 3.000, incl 38.10 to 76.20, incl A 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 extrusions shall supply all samples for vendors tests
22、 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 conform to the specified requirements. 4.2 Classification of Tests: 4.2.1 Acceptance Tests: Composition (3.
23、1), tensile properties (3.3.1), ultrasonic inspection (3.4.1) when specified, and tolerances (3.5) are acceptance tests and, except for composition, shall be performed on each inspection lot. 4.3 Sampling and Testing: Shall be in accordance with AMS 2355. 4.4 Reports: 4.4.1 The vendor of extrusions
24、shall furnish with each shipment a report stating that the extrusions conform to the composition requirements and tolerances, results of ultrasonic inspection (when specified), and showing the numerical results on each inspection lot to determine conformance to the other acceptance tests . This repo
25、rt shall include the purchase order number, inspection lot number, AMS 4331, size or section identification number, and quantity. The report shall also include the producer, product form and size of the mill product. 4.5 Resampling and Retesting: Shall be in accordance with AMS 2355. 5. PREPARATION
26、FOR DELIVERY: 5.1 Identification: Shall be in accordance with ASTM B 666/B 666M. SAE INTERNATIONAL AMS4331 Page 5 of 5 5.2 Packaging: 5.2.1 Extrusions shall be prepared for shipment in accordance with ASTM B 660 and in compliance with applicable rules and regulations pertaining to the handling, pack
27、aging, and transportation of the product to ensure carrier acceptance and safe delivery. 6. ACKNOWLEDGMENT: A vendor shall mention this specification number in all quotations and when acknowledging purchase orders. 7. REJECTIONS: Extrusions not conforming to this specification, or to modifications a
28、uthorized 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, not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left
29、 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 contain editorial changes only. 8.2 Terms used in AMS are clarified in APR 1917. 8.3 Dimensions and properti
30、es in inch/pound units are primary; dimensions and properties in SI units 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 4331 Form and size or section identification number of extrusions desired Specify if ultrasonic testing is required Quantity of product desired. 8.5 Key Words: Bars, rods, wire, profiles, tubing PREPARED UNDER JURISDICTION OF AMS COMMITTEE D
