1、Aluminum Alloy, 2024, Bar, Rod, and Wire;Rolled, Drawn, or Cold FinishedA92024RATIONALEThis document has been reaffirmed to comply with the SAE 5-year Review policy.NOTICEThis document has been taken directly from Federal Specification QQ-A-225/6E, and Amendment 1 and contains only minor editorial a
2、nd format changes required to bring it into conformance with the publishing requirements of SAE technical standards.The original Federal Specification was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelera
3、ted adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, (b) the use of the existing government specification or standard format, and (c) th
4、e exclusion of any qualified product list (QPL) sections.The complete requirements for procuring 2024 aluminum alloy bar, rod, and wire, rolled, drawn, or cold finished shall consist of this specification and the latest issue of AMS-QQ-A-225.AEROSPACE MATERIAL SPECIFICATIONAMS-QQ-A-225/6AIssuedRevis
5、edReaffirmedSuperseding AMS-QQ-A-225/61997-071998-092010-05SAE 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 partic
6、ular use, including any patent infringement arising therefrom, 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 2010 SAE Interna
7、tional All rights reserved. No part of this publication 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: 877-606-732
8、3 (inside USA and Canada) Tel: +1 724-776-4970 (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/AMSQQA225/6A AMS-QQ-A-225/6A SAE AMS
9、-QQ-A-225/6A- 2 -1. SCOPE AND CLASSIFICATION:1.1 Scope: This specification covers the specific requirements for 2024 aluminum alloy bar, rod and wire produced by rolling, drawing or cold finishing.1.2 Classification: 1.2.1 Tempers: Bar, rod, and wire are of the following tempers as specified (See 6.
10、2): O, T4, T6, T36, T42, T62, T351, or T851 temper. Definitions of these tempers are specified in AMS-QQ-A-225.2. APPLICABLE DOCUMENTS: See AMS-QQ-A-225.3. REQUIREMENTS: 3.1 Chemical Composition: The chemical composition shall conform to the requirements specified in Table I.TABLE I. Chemical Compos
11、ition 1/ElementPercentMinimum MaximumCopper 3.8 4.9Magnesium 1.2 1.8Manganese 0.30 0.9Iron -0.50SiliconZinc -0.25Chromium 10Titanium -0.5Other Elements, each 0Other Elements, total -0.15Aluminum Remainder1/ Analysis shall routinely be made only for the elements specifically mentioned in Table I. If,
12、 however, the presence of other elements is indicated or suspected in the course of routine analysis, further analysis shall be made to determine conformance to the limits specified for other elements.AMS-QQ-A-225/6A SAE AMS-QQ-A-225/6A- 3 -3.2 Mechanical Properties: 3.2.1 Mechanical Properties of M
13、aterial as Supplied: The mechanical properties in the direction of working shall conform to the requirements of Table II for the temper specified.TABLE II. Mechanical Properties (See 6.4)TemperDiameterorThicknessInchesTensileStrengthminimumksiYield Strengthat 0.2 percentOffset orat ExtensionIndicate
14、d 7/Elongationin 2 in. or4 timesdiameter 7/minimumpercentminimum,ksiExtensionunder Load,inch/inchO Up to 8.000, incl 35.0 2/ -16T4 Up to 0.499, incl 62.0 45.0 3/ 0.0063 100.500 through 4.500 4/ 62.0 42.0 3/ 0.0060 104.501 through 6.500 5/ 62.0 40.0 0.0058 106.501 through 8.000 5/ 58.0 38.0 0.0056 10
15、T6 Up to 6.500, incl 4/ 62.0 50.0 0.0067 5T36 Up to 0.375, incl 69.0 52.0 0.0069 10T42 6/ Up to 6.500, incl 4/ 62.0 40.0 0.0058 10T62 6/ Up to 6.500, incl 4/ 60.0 46.0 0.0064 5T351 1/ 0.500 through 6.500 4/ 62.0 45.0 0.0063 10T851 1/ 0.500 through 6.500 4/ 66.0 58.0 0.0074 51/ Tempers T351 and T851
16、are available only in bar and rod2/ Maximum3/ Minimum yield strength of coiled 2024-T4 wire and rod is 40.0 ksi4/ For square, rectangular, hexagonal, or octagonal bar maximum thickness is 4 inches, and maximum cross-sectional area is 36 square inches5/ Applicable to rod only6/ Material in the T42 an
17、d T62 tempers are not available from the material producers7/ See AMS-QQ-A-225 for yield strength and elongation requirement exceptionsAMS-QQ-A-225/6A SAE AMS-QQ-A-225/6A- 4 -3.2.2 Mechanical Properties for Aging Capability: In addition to conforming to the requirements of 3.2.1, material supplied i
18、n the tempers identified in the following paragraphs shall, after having been processed to tempers also identified therein, have properties conforming to those specified in Table II, as applicable, in the direction of work. Such capability shall be demonstrated when specified (See 6.2).3.2.2.1 Mater
19、ial in the Annealed (O) Temper: Material up through 6.500 inches in diameter or 4 inches in thickness and 36 inches in cross-sectional area supplied in the O temper, without subsequent cold work or forming operations, shall, after proper re-solution and artificial aging or natural aging, develop the
20、 properties specified for the T62 or T42 tempers respectively.3.2.2.2 Material in the T4, T6, T36, T351, and T851 Tempers: Material supplied in the T4, T6, T36, T351, and T851 tempers shall, without subsequent cold work or forming operations, be re-solution heat treatable and aged to the properties
21、specified for the T62 or T42 tempers.3.2.2.3 Material in the T4 and T351 Tempers: Material supplied in the T4 and T351 tempers shall be artificially aged to the properties specified for the T6 and T851 tempers, respectively. Such capability shall be demonstrated when specified (See 6.2).3.2.3 Bendin
22、g: When specified (See 6.2), the material shall withstand, without cracking, the bend test specified in AMS-QQ-A-225. The values for bend factor N are given in Table III.3.3 Finish: See AMS-QQ-A-225.3.4 Marking: In addition to marking required in AMS-QQ-A-225, material in the T4, T6, T36, T62, T351,
23、 and T851 tempers shall also be identified by a lot number marked in at least one location on each piece.TABLE III. Bend Test Factor “N“TemperDiameter, Thickness orLeast Distance BetweenParallel Faces, Inches NO Up to 0.124, incl 1T351, T4, Up to 0.124, incl 3T42 0.125 to 6.500, incl 6AMS-QQ-A-225/6
24、A SAE AMS-QQ-A-225/6A- 5 -4. QUALITY ASSURANCE PROVISIONS: See AMS-QQ-A-225 and the following:4.1 Heat Treatment, Aging Period Before Mechanical Property Testing: Specimens in the T4, T42 and T351 tempers will not be required to be tested within 4 days after completion of the heat treatment. If, wit
25、hin this period, the manufacturer elects to test samples which fail to meet the requirements, he can discard these initial test results and test additional specimens selected after four days of aging. These specimens shall be selected from the same location in the lot from which the prior specimens
26、were removed.4.2 Mechanical Test for Aging Capability: 4.2.1 Number of Tests for Aging Capability: From material in the annealed (O) temper, an additional number of specimens equal to those required by AMS-QQ-A-225 shall be taken and tested after solution heat treatment to determine compliance with
27、3.2.2.5. PREPARATION FOR DELIVERY: See AMS-QQ-A-225.6. NOTES:6.1 Intended Use: This alloy is intended for use where high strength is required and welding is not involved. Tempers T351 and T4 should not be used where optimum corrosion resistance is required. Tempers T6 and T851 should be specified wh
28、en optimum resistance to stress corrosion is required. The T351 and T851 tempers are intended primarily to provide material with low residual stresses and consequent minimum distortion during machining.6.2 Ordering Data: Purchasers should select the preferred options permitted herein and include the
29、 following information in procurement documents:Title, number, and date of this specification.Form, quantity, and temper required (See 1.2.1).Dimensions required.Mechanical properties and dimensional tolerance requirements for sizes not specifically covered.Whether bend test is required (See 3.2.3).
30、Requirements for demonstration of aging capability to develop properties in the tempers specified (See 3.2.2.2 and 3.2.2.3).Finish requirements (See 3.3).Whether there are special end use requirements.AMS-QQ-A-225/6A SAE AMS-QQ-A-225/6A- 6 -6.2 (Continued):For military agencies: selection of applica
31、ble levels of preservation, packaging, and packing required. Also specify marking requirements (See AMS-QQ-A-225).For civil agencies: specify packing level, level A, or commercial. Also specify marking requirements (See AMS-QQ-A-225).6.3 Product produced and marked to the requirements of AMS-QQ-A-22
32、5/6 also meets the requirements of QQ-A-225/6E, Amendment 1. Product produced and marked to the requirements of QQ-A-225/6E, Amendment 1, also meets the requirements of AMS-QQ-A-225/6.6.4 Properties listed in 3.2.1 are exactly the same as QQ-A-225/6, Revision E, Amendment 1. These properties have no
33、t been substantiated in accordance with the AMS Manual for Preparation of Aerospace Specifications.6.5 Changes authorized by QQ-A-225/6E, Amendment 1 have been incorporated into applicable paragraphs 1.2.1, Table II, 3.2.2, 3.2.2.1, 3.2.2.2, 3.2.2.3, 3.3, 4.2, and 6.2.6.6 The change bar ( l ) locate
34、d 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 of the document title indicates a complete revision of the specification.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D“
