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/AMSQQA250/12AAEROSPACE MATERIAL SPECIFICATIONAMS-QQ-A-250/12 REV. AIssued 1997-08Reaffirmed 2
5、007-04Stabilized 2013-12Superseding AMS-QQ-A-250/12Aluminum Alloy 7075, Plate and SheetA97075RATIONALEAMS-QQ-A-250/12A results from a five year review of this specification.STABILIZATION NOTICEAMS-QQ-A-250/12A has been declared “STABILIZED“ by AMS Committee D. This document will no longer be updated
6、 and may no longer represent standard industry practice. The last technical update of this document occurred in July 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
7、. CAUTION: 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 doe
8、s not constitute authority to substitute these specifications for the “STABILIZED” specification.AMS4044 Aluminum Alloy, Sheet and Plate5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr Annealed (7075-0) or when specified, As Fabricated (7075-F)AMS4045 Aluminum Alloy Sheet and Plate 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr 7075
9、: (-T6 Sheet, -T651 Plate) Solution and Precipitation Heat TreatedAMS4078 Aluminum Alloy Sheet and Plate 5.6Zn 2.5Mg-1.6Cu-0.23Cr 7075: (-T73 Sheet, -T7351 Plate) Solution Heat Treated and OveragedCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or netw
10、orking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 1 of 7 NOTICEThis document has been taken directly from Federal Specification QQ-A-250/12F and contains only minor editorial and format changes required to bring it into conformance with the publishing requirements
11、 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 provide for (a) the p
12、ublication 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 requirements for p
13、rocuring 7075 aluminum alloy plate and sheet 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 INTERNATIONAL AMS
14、-QQ-A-250/12A Page 2 of 7 1. SCOPE AND CLASSIFICATION:1.1 Scope: This specification covers the specific requirements for 7075 aluminum alloy plate and sheet.1.2 Classification: 1.2.1 Tempers: The plate and sheet are classified in one of the following tempers as specified (See 6.3 and 6.4): O, T6, T6
15、2, T73, T651, T7351, or F temper. 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. Chemical Composition 1/Per
16、centElement Minimum MaximumZinc 5.1 6.1Magnesium 2.1 2.9Copper 1.2 2.0Chromium 0.18 0.28Manganese - 0.30Iron - 0.50Silicon - 0.40Titanium - 0.20Other Elements, each - 0.05Other Elements, total - 0.15Aluminum Remainder1/ Analysis shall routinely be made only for the elements specifically mentioned in
17、 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 limitsCopyright SAE International Provided by IHS under license with SA
18、ENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 3 of 7 3.2 Mechanical Properties: 3.2.1 Mechanical Properties of Material as Supplied: The mechanical properties perpendicular to the direction of the final rolling, except for
19、 material under 9 inches in width, shall conform to the requirements of Table II for the temper specified. For material under 9 inches in width, the mechanical properties parallel to the direction of final rolling shall conform to the requirements of Table II for the temper specified.TABLE II. Mecha
20、nical Properties (See 6.6)TemperThicknessInchesTensileStrengthminimumksi(UOS)1/Yield Strength at0.2 percent Offsetor at extensionshownElongation in2 inches or 4times D 2/, 3/minimumpercentMinimumksi(UOS) 1/Extensionunder loadinch/inchO 0.015 - 0.499 40.0 4/ 21.0 4/ 0.0040 4/100.500 - 2.000 40.0 4/ -
21、 - 10T6 and 0.008 - 0.011 74.0 63.0 0.0083 5T62 5/ 0.012 - 0.039 76.0 67.0 0.0085 70.040 - 0.125 78.0 68.0 0.0086 80.126 - 0.249 78.0 69.0 0.0087 8T651 0.250 - 0.499 78.0 67.0 0.0085 9and T62 0.500 - 1.000 78.0 68.0 0.0086 75/, 7/ 1.001 - 2.000 77.0 67.0 0.0085 62.001 - 2.500 76.0 64.0 0.0082 52.501
22、 - 3.000 72.0 61.0 0.0079 53.001 - 3.500 71.0 58.0 0.0076 53.501 - 4.000 67.0 54.0 0.0072 3T73 0.040 - 0.249 67.0 56.0 0.0074 8T7351 0.250 - 1.000 69.0 57.0 0.0075 71.001 - 2.000 69.0 57.0 0.0075 62.001 - 2.500 66.0 52.0 0.0070 62.501 - 3.000 64.0 49.0 0.0067 63.001 - 3.500 63.0 49.0 0.0067 63.501 -
23、 4.000 61.0 48.0 0.0066 6FAl 6/ 6/ 6/ 6/1/ Properties are minimum, unless otherwise specified, abbreviated: UOS.2/ Not required for material 1/2 inch or less in width.3/ D represents specimen diameter.4/ Maximum.5/ Material in the T62 temper is not available from material producers.6/ No requirement
24、s.7/ The properties specified for the T651 temper are those formerly specified for the T6 temper.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 4 of 7 3.2.2 M
25、echanical Properties After Heat Treatment: In addition to conforming to the requirements of 3.2.1, material in 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 appli
26、cable.3.2.2.1 Material in the Annealed (O) and As-Fabricated (F) Tempers: Material in the O and F tempers, without the subsequent imposition of cold work or forming operations, shall, after proper solution and artificial aging treatments, develop the properties specified for the T6 and T62 tempers.
27、Material in the O and F tempers, without the subsequent imposition of cold work or forming operations, shall be heat treatable to the properties specified for the T73 temper. Such capability shall be demonstrated when specified (See 6.2 and 6.4).3.2.2.2 Material in the T6, T73, and T7351 Tempers: Ma
28、terial in the T6, T73, and T7351 tempers, without the subsequent imposition of cold work or forming operations, shall be heat treatable to the properties specified for the T6 and T62 tempers. Such capability shall be demonstrated when specified (See 6.2 and 6.4).3.2.2.3 Material in the T6 and T651 T
29、empers: Material in the T6 and T651 tempers shall be heat treatable to the properties specified for the T73 and T7351 tempers, as applicable. Such capability shall be demonstrated when specified (See 6.4).3.2.3 Bend-Test: Bend specimens taken from material shall be capable of withstanding, without c
30、racking, the bend-test specified in AMS-QQ-A-250. The values for bend factor “N“ are given in Table III.TABLE III. Bend Test Factor “N“TempersThickness, inch O T6 and T620.008 - 0.020 1 70.021 - 0.062 2 80.063 - 0.091 3 90.092 - 0.125 4 100.126 - 0.249 5 110.250 - 0.499 6 14Copyright SAE Internation
31、al Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 5 of 7 3.3 Internal Defects: When specified (See 6.4), plate shall be ultrasonically inspected (See AMS-QQ-A-250). Acceptance limits sha
32、ll be as specified in Table IV.3.4 Resistance to Stress-Corrosion Cracking: Material 0.750 inch and thicker in the T73 and T7351 tempers shall exhibit no evidence of stress-corrosion cracking when subjected to the test specified in 4.2.3.4.1 Acceptance Criteria for Stress-Corrosion Cracking: Resista
33、nce to stress-corrosion cracking for each lot of 7075-T73 and T7351 material shall be established by testing the previously selected tension sample to the following criteria:a. Determine electrical conductivity and tensile propertiesb. If the conductivity is below 38.0 percent International Annealed
34、 Copper Standard (IACS), the material is considered unsatisfactory and must be reprocessed, regardless of property levelc. If the conductivity is 40.0 percent IACS or higher and tensile properties meet the minimum values specified herein, the material is considered to be satisfactoryd. If conductivi
35、ty is 38.0 to 39.9 percent IACS inclusive, if tensile properties meet the minimum limits specified herein, and if the yield strength does not exceed the specified minimum by more than 11.9 ksi, the material is considered to be satisfactorye. If conductivity is below 40.0 percent IACS and the yield s
36、trength exceeds the specified minimum value by 12.0 ksi or more, the material is considered suspectf. When material is considered suspect, it may be given additional second step aging or be reprocessed3.5 Marking: In addition to the marking required in AMS-QQ-A-250, material in the T6, T651, T73, an
37、d T7351 tempers shall be identified by an inspection lot number marked in at least one location on each piece.TABLE IV. Ultrasonic Discontinuity Acceptance Limits 1/ThicknessInchesMaximum Weight per PiecepoundsDiscontinuityClass 2/0.500 - 1.499 2,000 B1.500 - 3.000 2,000 A3.001 - 4.000 2,000 B1/ Dis
38、continuities in excess of those listed in Table IV 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/ The discontinuity class limits are defined in AMS-QQ-A-250.Copyright SAE Internationa
39、l Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 6 of 7 4. QUALITY ASSURANCE PROVISIONS: See AMS-QQ-A-250 and the following:4.1 Sampling: Sampling for conformance to the requirements of
40、Section 3 shall be as specified in AMS-QQ-A-250.4.1.1 Sampling for Heat Treatability: From material in each temper of those specified for heat treatability demonstrations in 3.2.2 and 6.4, an additional number of specimens equal to that required by AMS-QQ-A-250 shall be taken and tested after heat t
41、reatment to each temper specified, as applicable, to determine conformance to 3.2.2.4.1.2 Sampling for Electrical Conductivity Tests: Samples for these tests shall be those used for tension tests.4.2 Procedure for Stress-Corrosion Cracking Test: Specimens shall be stressed in tension in the short-tr
42、ansverse direction with respect to grain flow and held at constant strain. The stress level shall be 75 percent of the minimum specified long-transverse yield strength. The specimens shall be subjected to the stress-corrosion test specified in AMS-QQ-A-250. It shall be the responsibility of the cont
43、ractor that test results be recorded, identified as to inspection lot, and preserved.5. PREPARATION FOR DELIVERY: See AMS-QQ-A-250.6. NOTES:6.1 Intended Use: Alloy 7075 plate and sheet are intended for use in applications requiring a high strength heat-treatable aluminum alloy.6.2 Mechanical Propert
44、ies After Heat Treatment: Mechanical properties of producer-supplied material are certified for the temper of material supplied. The producers “capability“ demonstration is not evidence that user-treated material conforms to property requirements of a given temper. Frequently, user-heat-treated mate
45、rial may develop a lower level of properties, especially if any cold, warm, or hot work is introduced, prior to heat treatment. The user should be held responsible for demonstrating that his processing is acceptable.6.3 Temper: T651 and T7351 tempers are available in plate only.Copyright SAE Interna
46、tional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE INTERNATIONAL AMS-QQ-A-250/12A Page 7 of 7 6.4 Ordering Data: Purchasers should select the preferred options permitted herein and include the following information in p
47、rocurement documents:Title, number, and date of this specification.Form, quantity, and temper required (See 1.2.1).Dimensions required.Requirements for sizes not specifically covered (See AMS-QQ-A-250).Whether ultrasonic inspection of plate is required (See 3.3).Selection of applicable levels of pre
48、servation, packaging, and packing required if other than Level C (See AMS-QQ-A-250).Whether demonstration of capability to develop properties in tempers other than those supplied is required (See 3.2.2).Special end use requirements.Duration of maintenance of stress-corrosion test records.6.5 Product produced and marked to the requirements of AMS-QQ-A-250/12A also meets the requirements of QQ-A-250/12F. Product produced and marked to the requirements ofQQ-A-250/12F also meets the requirements of AMS-QQ-A-
