SAE AMS-QQ-A-200 15B-2013 Aluminum Alloy Bar Rod and Shapes Extruded 7075-T76 Improved Exfoliation Resistance《改良耐腐蚀铝合金棒 杆材和型材挤压制品7075-T76》.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 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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2012 SAE InternationalAll rights reserved. No part of this publication may b

3、e 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 (outside USA)Fax

4、: 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/AMSQQA200/15BAEROSPACEMATERIALSPECIFICATIONAMS-QQ-A-200/15REV. BIssued 1997-07Reaffirmed 2007-04Stabilize

5、d 2013-07Superseding AMS-QQ-A-200/15AAluminum Alloy Bar, Rod, and Shapes, Extruded, 7075-T76Improved Exfoliation ResistanceA97075RATIONALEAMS-QQ-A-200/15B stabilizes this document because equivalent technical requirements are contained in AMS4317.STABILIZATION NOTICEAMS-QQ-A-200/15B has been declare

6、d “STABILIZED“ by AMS Committee D and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical requirements. Newer technology may exist. AMS Committee D has never performed a technical update of this document.

7、 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. CAUTION: In many cases the purchaser is not the cognizant engineering organization (i.e. purchaser may be a sub tier sup

8、plier). AMS Committee D recommends that the following technically equivalent (e.g. properties, fit, form, function) specification be used for future procurement. This listing does not constitute authority to substitute this specification for the “STABILIZED” specification.AMS4317 Aluminum Alloy, Ext

9、ruded Bar, Rod, and Shapes 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr 7075-T76(51X) Solution Heat Treated and OveragedNOTICEThis document has been taken directly from Federal Specification QQ-A-200/15B and contains only minor editorial and format changes required to bring it into conformance with the publishing

10、 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 provide

11、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 standardformat, and (c) the exclusion of any qualified product list (QPL) sections.The complete requir

12、ements for procuring aluminum alloy 7075-T76 bar, rod, and shapes extruded described herein shall consist of this document and the latest issue of AMS-QQ-A-200.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from

13、 IHS-,-,-SAE AMS-QQ-A-200/15B Page 2 of 61. SCOPE AND CLASSIFICATION:1.1 Scope:This specification covers the specific requirements for aluminum alloy 7075-T76 bar, rod, and shapes produced by extrusion (See AMS-QQ-A-200/11 for specific requirements for 7075 extrusions in other tempers).1.1.1 Tempers

14、: Bar, rod, and shapes are classified in the following tempers as specified (See 6.2): T76, T76510, or T76511. Definitions of tempers are specified in AMS-QQ-A-200.2. APPLICABLE DOCUMENTS:See AMS-QQ-A-200.3. REQUIREMENTS:3.1 Chemical Composition:The chemical composition shall conform to the requirem

15、ents specified in Table I.TABLE I. CHEMICAL COMPOSITION 1/ElementPercentMinimum MaximumCopper 1.2 2.0Magnesium 2.1 2.9Manganese - 0.30Chromium 0.18 0.28Titanium - 0.20Iron - 0.50Silicon - 0.40Zinc 5.1 6.1Other Elements, each - 0.05Other Elements, total 2/ - 0.15Aluminum Remainder1/ Analysis shall ro

16、utinely 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.2

17、/ The sum of those “Others“ metallic elements 0.010 percent or more each, expressed to the second decimal before determining the sum.3.2 Mechanical Properties:Mechanical properties of as-supplied material in the longitudinal (extrusion) direction shall conform to property requirements specified in T

18、able II, except as exempted from elongation requirements by AMS-QQ-A-200.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS-QQ-A-200/15B Page 3 of 6TABLE II. MECHANICAL PROPERTIESTemperSpecified

19、 Thickness, (bar and shapes); diameter, rodInchesAreaSquare InchesUltimate Tensile Strength minimumksiYield Strength at 0.2 percent Offset or at extension indicatedElongation in 2 inches or 4 times specimen diameter minimum percentminimum ksiExtension under load inch per inchAll up thru 0.049 all 73

20、.0 63.0 0.0082 7(T76, 0.050 - 0.125 all 74.0 64.0 0.0082 7T76510, 0.125 - 0.249 up thru 20 74.0 64.0 0.0082 7And 0.250 - 0.499 up thru 20 75.0 65.0 0.0084 7T76511) 0.500 - 1.000 up thru 20 75.0 65.0 0.0084 71.001 - 2.000 up thru 20 75.0 65.0 0.0084 72.001 - 3.000 up thru 20 74.0 64.0 0.0082 73.001 -

21、 4.000 up thru 20 74.0 63.0 0.0082 73.3 Internal Defects:When specified (See 6.2), rod, bar, and shapes shall be ultrasonically inspected (See AMS-QQ-A-200). Acceptance limits shall be as specified in Table III. All extrusions in the inspection lot shall be inspected.TABLE III. ULTRASONIC DISCONTINU

22、ITY ACCEPTANCE LIMITS 1/, 2/Thickness (bar and shapes), inches 3/Maximum Weight of Piece (pounds)Maximum Width to Thickness RatioDiscontinuity Class 4/0.500 - 1.499 600 10 to 1 B1.500 and over 600 10 to 1 A1/ Discontinuities in excess of those listed in Table III may be allowed subject to approval o

23、f the procuring activity, if it is established that they will be removed by machining or that they are in noncritical areas.2/ Requirements for ultrasonic inspection for sizes, maximum weights, and discontinuity classes differing from those shown in Table III and for rod shall be specified in the co

24、ntract provided the techniques and standards are agreed to by the procuring activity and the contractor (See 6.2).3/ For thickness of a shape, see definition for shape in AMS-QQ-A-200.4/ Discontinuity class limits are defined in MIL-STD-2154.3.4 Resistance to Exfoliation Corrosion and Stress-Corrosi

25、on Cracking:3.4.1 Exfoliation Corrosion: Material, tested in accordance with 4.2.4, shall not show exfoliation corrosion equivalent to or in excess of that depicted in Figure 2 of ASTM G 34-72 for category B. The frequency of tests shall be in accordance with AMS-QQ-A-200.3.4.2 Stress-Corrosion Crac

26、king: Extrusions, 0.750-inch and over in thickness, shall exhibit no susceptibility to stress-corrosion cracking under the conditions of the test specified in 4.2.5. The frequency of tests shall be in accordance with AMS-QQ-A-200.Copyright SAE International Provided by IHS under license with SAENot

27、for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS-QQ-A-200/15B Page 4 of 63.4.3 Lot Acceptance Control Criteria: Resistance to exfoliation corrosion and stress-corrosion cracking for each inspection lot of material shall be determined by the following control cri

28、teria (See 4.1.2 and 4.2.6).Determine electrical conductivity and mechanical properties.If the conductivity is 38.0 percent International Annealed Copper Standards (IACS) or higher, and the tensile properties meet the minimum limits specified herein, the material is acceptable.If the conductivity is

29、 at least 36.0 percent IACS but less than 38.0 percent IACS, and the tensile properties meet the limitsspecified herein, the material shall either be tested as specified in 4.2.4 or be reprocessed.If the conductivity is below 36.0 percent IACS, the material is not acceptable and must be reprocessed.

30、3.5 Marking of Extrusions:In addition to marking as required in AMS-QQ-A-200, each extrusion shall be marked with its appropriate inspection lot number in at least one location.4. QUALITY ASSURANCE PROVISIONS:See AMS-QQ-A-200 and the following:4.1 Sampling:4.1.1 For Chemical Analysis, Mechanical Pro

31、perties, and for Exfoliation Corrosion and Stress-Corrosion Cracking Tests: Samples for chemical analysis, determination of mechanical properties, exfoliation corrosion, and stress-corrosion cracking tests shall comply with the applicable requirements of AMS-QQ-A-200.4.1.2 For Conductivity Tests: Co

32、nductivity shall be measured on the same specimens used for mechanical property tests. Conductivity shall be measured prior to testing for mechanical properties.4.2 Test Methods:4.2.1 Chemical Analysis: Samples selected in accordance with 4.1.1. shall be analyzed to determine conformance to 3.1 usin

33、g the test methods specified in AMS-QQ-A-200.4.2.2 Mechanical Properties: Samples selected in accordance with 4.1.1 shall be prepared for testing and tested in accordance with AMS-QQ-A-200 to determine conformance to 3.2.4.2.3 Ultrasonic Inspection: When ultrasonic inspection is specified (See 6.2),

34、 extrusions shall be inspected in accordance with MIL-STD-2154 to determine conformance to 3.3.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS-QQ-A-200/15B Page 5 of 64.2.4 Exfoliation Corros

35、ion Test: Samples taken in accordance with 4.1.1 shall be tested for conformance to 3.4.1 using the test method specified by ASTM G 34-72. Full-size extrusions or sections of extrusions, sufficiently large to provide visual assessment of attack, shall be used. For all test coupons, 10 percent of the

36、 thickness shall be removed by machining one surface. The machined surface shall be the surface evaluated.4.2.5 Stress-Corrosion Cracking Test: In order to determine conformance to 3.4.2, stress-corrosion cracking tests shall be performed in accordance with ASTM G 47. Specimens shall be stressed in

37、the short transverse direction with respect to grain flow and held at constant strain. The stress level shall be 25.0 ksi, and the test duration shall be 20 days.4.2.6 Electrical Conductivity Tests: Specimens selected in accordance with 4.1.2 shall be tested for conformance to 3.4.3. Specimen prepar

38、ation and testing shall be in accordance with AMS-QQ-A-200.4.3 Test Records:It is the responsibility of the contractor that all test results be recorded, identified as to inspection lot, and preserved after completion of the contract or purchase order. These records shall be made available to the pu

39、rchaser (or procuring agency) upon request.5. PREPARATION FOR DELIVERY:See AMS-QQ-A-200.6. NOTES:6.1 Intended Use:This alloy is intended for use where high strength is required and where exfoliation resistance superior to that of 7075-T6 is required.6.2 Ordering Data:Purchasers should select the pre

40、ferred options permitted herein and include the following information in procurement documents:Title, number, and date of this specification.Form and temper required (See 1.2).Dimensions required.Requirements for sizes not specifically covered (See AMS-QQ-A-200).Special end use requirements.Whether

41、ultrasonic inspection of extrusions is required (See 3.3).Selection of applicable levels of preservation, packaging, and packing required, whether Level A, Level B, or commercial (See AMS-QQ-A-200).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or net

42、working permitted without license from IHS-,-,-SAE AMS-QQ-A-200/15B Page 6 of 66.3 Product produced and marked to the requirements of AMS-QQ-A-200/15 also meets the requirements of QQ-A-200/15B. Product produced and marked to the requirements of QQ-A-200/15B also meets the requirements of AMS-QQ-A-2

43、00/15.6.4 The properties listed in 3.2.1 are exactly the same as QQ-A-200/15, Revision B. These properties have not been substantiated in accordance with the AMS Manual for Preparation of Aerospace Specifications.6.5 The change bar (|) located in the left margin is for the convenience of the user in

44、 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“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-