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 theref
2、rom, 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 2013 SAE InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AMSQQA250/29AAEROSPACE MATERIAL SPECIFICATIONAMS-QQ-A-250/29 REV. AIssued 1997-08Reaffirmed 2
5、007-04Stabilized 2013-12Superseding AMS-QQ-A-250/29Aluminum Alloy 2124, PlateA92124RATIONALEAMS-QQ-A-250/29A results from a five year review of this specification.STABILIZATION NOTICEAMS-QQ-A-250/29A has been declared “STABILIZED“ by AMS Committee D. This document will no longer be updated and may n
6、o longer represent standard industry practice. The last technical update of this document occurred in August 1997. Users of this document should refer any certification issues (e.g. exceptions listed on the certification report) to the cognizant engineering organization for their disposition. CAUTIO
7、N: In many cases the purchaser is not the cognizant engineering organization (i.e. purchaser may be a sub tier supplier).AMS Committee D recommends that the following technically equivalent (e.g. properties, fit, form, function) specifications be used for future procurement. This listing does not co
8、nstitute authority to substitute these specifications for the “STABILIZED” specification.AMS4101 Aluminum Alloy, Plate 4.4Cu 1.5Mg 0.60Mn (2124-T851) Solution Heat Treated, Stretched, and Precipitation Heat TreatedCopyright SAE International Provided by IHS under license with SAENot for ResaleNo rep
9、roduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/29A Page 1 of 6 NOTICEThis document has been taken directly from Federal Specification QQ-A-250/29A and contains only minor editorial and format changes required to bring it into conformance with the publis
10、hing 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 accelerated adoption of government specifications and standards. TSB rules prov
11、ide 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) the exclusion of any qualified product list (QPL) sections.The complete r
12、equirements for procuring 2124 aluminum alloy plate described herein shall consist of this document and the latest issue of AMS-QQ-A-250.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIO
13、NAL AMS-QQ-A-250/29A Page 2 of 6 1. SCOPE AND CLASSIFICATION:1.1 Scope: This specification covers the specific requirements for 2124 aluminum alloy plate for intended use in the -T851 temper; the general requirements are covered in AMS-QQ-A-250.1.2 Classification: 1.2.1 Tempers: The plate shall be f
14、urnished in the -T351 or -T851 tempers as specified (See 6.3). Definitions of these tempers are specified in AMS-QQ-A-250.2. APPLICABLE DOCUMENTS: See AMS-QQ-A-250.3. REQUIREMENTS: 3.1 Chemical Composition: 3.1.1 The chemical composition shall conform to the requirements specified in Table I.TABLE I
15、. Chemical Composition. 1/PercentElement Minimum MaximumCopper 3.8 4.9Magnesium 1.2 1.8Manganese 0.30 0.9Iron - 0.30Zinc - 0.25Silicon - 0.20Titanium - 0.15Chromium - 0.10Zirconium plus Titanium - 0.20Other Elements, each - 0.05Other Elements, total - 0.15Aluminum Remainder1/ Analysis shall routinel
16、y be made only for the elements specifically mentioned in Table I. If, however, the presence of other elements is indicated or suspected in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess of specified limits.Copyrig
17、ht SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/29A Page 3 of 6 3.2 Heat Treatment: Heat treatment shall be in accordance with requirements for alloy 2024 plate in MIL-H-6088.
18、3.3 Mechanical Properties: 3.3.1 Mechanical Properties of -T851 Material: The mechanical properties in the longitudinal, long-transverse, and short-transverse direction shall conform to the requirements of Table II.3.3.2 Mechanical Properties of -T351 Material: Material supplied in the -T351 temper
19、shall, after precipitation treatment, conform to the requirements of 3.3.1.3.4 Resistance to Stress-Corrosion Cracking: When specified (See 6.3), plate in -T851 temper or -T351 temper after precipitation treatment shall be resistant to stress-corrosion cracking when tested in accordance with 4.1.TAB
20、LE II. Mechanical Properties (See 6.5)ThicknessInchesDirectionof TestTensileStrengthminimumksiYield Strengthat 0.2 percentOffset, minimumksiElongation 1/in 2 in. or4 times D, 2/minimumPercent1.000 thru 2.000 Longitudinal 66.0 57.0 6Long-transverse 66.0 57.0 5Short-transverse 3/ 64.0 55.0 1.52.001 th
21、ru 3.000 Longitudinal 65.0 57.0 6Long-transverse 65.0 57.0 4Short-transverse 63.0 55.0 1.53.001 thru 4.000 Longitudinal 65.0 56.0 5Long-transverse 65.0 56.0 4Short-transverse 62.0 54.0 1.54.001 thru 5.000 Longitudinal 64.0 55.0 5Long-transverse 64.0 55.0 4Short-transverse 61.0 53.0 1.55.001 thru 6.0
22、00 Longitudinal 63.0 54.0 5Long-transverse 63.0 54.0 4Short-transverse 58.0 51.0 1.51/ Not required for material 1/2 inch or less in width.2/ D represents specimen diameter.3/ Short-transverse specimens not required from material under 1-1/2 inches in thickness.Copyright SAE International Provided b
23、y IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/29A Page 4 of 6 3.5 Internal Defects: When specified (See 6.3), plate shall be ultrasonically inspected (See AMS-QQ-A-250). Acceptance limits shall be as spec
24、ified in Table III.3.6 Marking: In addition to the marking required in FED-STD-184, plate shall be identified by an inspection lot number marked in at least one location on each piece.4. QUALITY ASSURANCE PROVISIONS: See AMS-QQ-A-250 and the following:4.1 Resistance to Stress-Corrosion Cracking: Spe
25、cimens from each plate or plates produced from a single ingot shall be subjected to the following test:4.1.1 Thirty days exposure, using three 0.225 inch diameter tensile-type specimens. Three C-ring specimens may be used for plate under 1.500 inches in thickness.4.1.2 Stressed in the short-transver
26、se direction with respect to grain flow and held at a constant strain. The stress level shall be 50 percent of the minimum long-transverse yield strength specified in Table II.TABLE III. Ultrasonic Discontinuity Acceptance Limits. 1/ThicknessInchesMaximum Weightper Piece 2/PoundsDiscontinuityClass 3
27、/1.000 thru 3.000 2,000 A3.001 thru 4.500 2,000 B4.501 thru 6.000 4/4/1/ Discontinuities in excess of those listed in Table III may be allowed subject to approval of the procuring activity, if it is established that they will be removed by machining or that they are in non-critical areas.2/ Class fo
28、r weights in excess of those shown shall be as agreed upon by user and supplier.3/ The discontinuity class limits are defined in MIL-I-8950.4/ Shall be as agreed upon by user and supplier.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking pe
29、rmitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/29A Page 5 of 6 4.1.3 The stressed specimens shall be exposed to a solution of 3-1/2 percent NaCl conforming to the purity and pH requirements of method 823 of FED-STD-151. The pH, temperature, humidity controls, and exposure cycle
30、shall also conform to FED-STD-151, method 823.4.1.4 Retesting for original specimen failure(s) at a rate of two specimens for each failed original is allowed. However all retest specimens must pass.4.2 Mechanical Property Testing: Tensile tests shall be performed on specimens in the -T851 condition
31、in accordance withAMS-QQ-A-250 except that tension specimens shall be taken from all three grain directions as shown in 3.3.1.5. PREPARATION FOR DELIVERY: See AMS-QQ-A-250.6. NOTES:6.1 Intended Use: This material is intended for use in structural application requiring a minimum of residual stresses
32、and improvement in short-transverse properties over those exhibited by alloy 2024. Material in the -T351 temper provides greater formability and is intended for use after forming and precipitation heat treatment to the -T851 temper.6.2 Fracture Toughness: Material producers and users are encouraged
33、to accumulate fracture toughness (KIC) data on this material as it is anticipated that future revision of this specification may contain fracture toughness requirements.6.3 Ordering Data: Purchasers should select the preferred options permitted herein and include the following information in procure
34、ment documents:Title, number, and date of this specification.Dimensions required.Temper required (See 1.2.1).Requirements for sizes not specifically covered (See AMS-QQ-A-250).Requirement for testing stress-corrosion cracking resistance (See 3.4).Whether ultrasonic inspection of plate is required (S
35、ee 3.5).Selection of applicable levels of preservation, packaging, and packing required if other than Level C (See AMS-QQ-A-250).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-
36、QQ-A-250/29A Page 6 of 6 6.4 Product produced and marked to the requirements of AMS-QQ-A-250/29 also meets the requirements of QQ-A-250/29A. Product produced and marked to the requirements ofQQ-A-250/29A also meets the requirements of AMS-QQ-A-250/29.6.5 The properties listed in 3.2.1 are exactly th
37、e same as were in QQ-A-250/29, Revision A. These properties have not been substantiated in accordance with the AMS Manual for Preparation of Aerospace Specifications.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “D“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
