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/AMSA25463 AEROSPACE MATERIAL SPECIFICATIONAMS-A-25463Issued 1999-08Reaffirmed 2013-07Adhesive
5、, Film FormMetallic Structural Sandwich ConstructionFSC 8040RATIONALEAMS-A-25463 has been reaffirmed to comply with the SAE five-year review policy.SAE INTERNATIONAL AMS-A-25463 Page 2 of 21 1. SCOPE: 1.1 Scope: This specification covers the requirements for adhesives in film form for bonding metal
6、facings to metal cores and to metal components of sandwich panels which are intended for use in primary and secondary structural airframe parts that may be exposed to temperatures up to 500F (260C). 1.2 Classification: The adhesive shall be furnished in the following types, classes and cure groups a
7、s specified (see 6.2). 1.2.1 Types: Type I - For long-time exposure to temperatures from -6r to +180F (-55 to +82C). Type II- For long-time exposure to temperatures from -6r to +300F (-55 to +149C). Type Ill- For long-time exposure from -6r to +300F (-55 to +149C) and short-time exposures from 300 t
8、o 500F (149 to 260C). Type IV- For long-time exposure from -6r to +500F (-55 to +260C). 1.2.2 Classes: Class 1 - For bonding metal facings to metal cores only. Class 2 - For bonding metal facings to metal cores, inserts, edge attachments and other components of completed sandwich structures. 1.2.3 C
9、ure temperature groups: Group 1 - Cure temperature 1 00F or less Group 2 - Cure temperatures over 1 00F to 200F Group 3 - Cure temperatures over 200 to 300F Group 4 - Cure temperatures over 300F SAE INTERNATIONAL AMS-A-25463 Page 3 of 21 2. APPLICABLE DOCUMENTS: The following publications, of the is
10、sue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. 2.1 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. QQ-A-250/4 MMM-A-
11、132 PPP-B-601 PPP-B-636 MIL-T-5624 MIL-C-7438 MIL-B-22191 MIL-S-25043 MIL-A-83377 MIL-STD-1 05 MIL-STD-129 2.2 ASTM Publications: Aluminum Alloy 2024, Plate and Sheet Adhesive, Heat Resistant, Airframe Structural, Metal to Metal Boxes, Wood, Cleated Plywood Boxes, Shipping, Fiberboard Turbine Fuel,
12、Aviation, Grades JP-4 and JP-5 Core Material, Aluminum, For Sandwich Construction Barrier Material Transparent, Flexible Heat Sealable Steel Plate, Sheet and Strip, 17-7 PH Corrosion Resistant, Precipitation Hardening Adhesive Bonding (Structural) For Aerospace and Other Systems, Requirements for Sa
13、mpling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM C 297-61 ASTM C 393-62 ASTM D 1781-76 Tension Test of Flat Sandwich Constructions in Flatwise Plane (Reapproved 1976) Flexure
14、Test of Flat Sandwich Constructions (Reapproved 1976) Climbing Drum Peel Test for Adhesives 2.3 Uniform Classification Committee, Agent Publications: Available from the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606. Uniform Freight Classification SAE INTER
15、NATIONAL AMS-A-25463 Page 4 of 21 2.4 National Motor Freight Traffic Association, Inc., Agent Publications: Available from the National Motor Freight Traffic Tariff Order Section, 1616 P Street, N.W., Washington, DC 20036. National Motor Freight Classification 3. REQUIREMENTS: 3.1 Qualification: Adh
16、esives furnished under this specification shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.3 and 6.3). 3.2 Material: The adhesive shall be thermosetting and shall meet the strength requirements of this specificatio
17、n. The adhesive shall not have a deleterious effect on the metal surfaces being bonded over the range of temperatures at which the adhesive will be used. There shall be no restrictions on the ingredients used in the adhesive other than those imposed by the technical requirements specified herein. Cl
18、ass 2 adhesives shall consist of an adhesive conforming to MMM-A-132, as applicable to the type, plus the requirements specified herein. 3.2.1 Formulation changes: The adhesive shall be approved only for the formulation on which qualification tests are made. Any changes by the manufacturer, such as
19、the adding of fillers, change in carrier, method of manufacture or change in weight per square foot in excess of the tolerance specified in 3.2.2 shall be cause for designating the adhesive as a new product which shall not be considered approved. The changed adhesive shall be given a new code number
20、 and shall be resubmitted for approval under this specification. 3.2.2 Identification of product: The manufacturer shall identify each product submitted under this specification according to its type, class, and cure group. The manufacturer shall also specify the medial weight, within a range of 20
21、percent (see 3.2.3), and the carrier, when applicable (see 3.2.3). In addition, the manufacturer shall designate each adhesive by a trade name and code number which shall be used to identify formula and batch. 3.2.3 Form: The adhesive shall be film form and shall consist either entirely of adhesive
22、or of a carrier impregnated with adhesive. The film weight (in pounds per square foot to the nearest 0.001 pound) shall be stated. Film adhesives of a given type and composition manufactured in more than one weight range shall be submitted for separate testing and qualification approval. Films withi
23、n a range of 20 percent of the medial weight shall be considered within one weight range when more than two weight ranges of a product are available. Approval of both the maximum and minimum weight products will then convey automatic approval of products of same type and composition with weights bet
24、ween the maximum and minimum. SAE INTERNATIONAL AMS-A-25463 Page 5 of 21 3.2.4 Primer: A liquid primer may be furnished and used with the adhesive in film form. The primer shall be considered an integral part of the adhesive system and shall be identified on the Qualified Products List. 3.3 Working
25、characteristics: 3.3.1 Application: The adhesives shall be suitable for application to metal facings and core materials in accordance with the manufacturers instructions at temperatures between 65F and 85F (18.3C and 29.4C) and at a maximum relative humidity of 60 percent. 3.3.2 Curing: The time, te
26、mperature and pressure used to cure the adhesive shall be within the range specified herein. 3.3.2.1 Curing times and temperatures: Maximum time to fully cured state for the cure groups in 1.2.3 shall be as follows: Group 1 - 7 days at 1 00F or less Group 2 - 24 hours at over 1 00F to 200F Group 3-
27、2 hours at over 200F to 300F Group 4- 2 hours at over 300F Additionally, types I and II adhesives shall require not longer than 2 hours for curing at temperatures not exceeding 350F (17rC) at the adhesive line. Types Ill and IV shall cure/ postcure at temperatures not to exceed 600 F (316C) at the a
28、dhesive line. 3.3.2.2 Curing pressure: In the preparation of sandwich constructions fabricated in accordance with 4.3.4, the pressure required for curing the adhesive shall not exceed the rated psi for the core construction. 3.4 Storage life: The adhesive manufacturer shall determine the longest per
29、iod of time from date of manufacture and the maximum temperature which the adhesive system, when stored in airtight containers or wrapped in suitable vapor barriers, will retain its capabilities of meeting the minimum strength requirements specified in 3.5. These storage conditions shall be included
30、 in the instruction sheet (see 3.6) and the test report (see 4.3.2.2). 3.5 Mechanical properties: 3.5.1 Class 1: When tested in accordance with the applicable paragraph in section 4, class 1 adhesive shall be not less than the minimum average and minimum individual values specified for all tests in
31、table I, as applicable to the type. SAE INTERNATIONAL AMS-A-25463 Page 6 of 21 3.5.2 Class 2: The mechanical properties of class 2 adhesives shall conform to those specified in MMM-A-132, as applicable to the type. In addition, when tested in accordance with section 4, class 2 adhesives shall not be
32、 less than the minimum individual values specified for all tests in table I, as applicable to the type. 3.6 Instruction sheet: A dated, coded and titled instruction sheet, outlining instructions for use of the adhesive, shall be supplied by the manufacturer. The instructions shall be forwarded with
33、the test report when requesting qualification (see 4.3.2). In addition, the instruction sheet shall accompany each shipment of adhesive (see 5.3). The following information shall be included: a. The general chemical type of the basic resin used in the adhesive, such as phenolic-chloroprene or vinyl-
34、phenolic, etc. The type and treatment of the carrier. b. Storage information required in 3.4 c. Complete recommended metal preparation. d. Application instructions, including primer film thickness range, temperature and relative humidity, if other than specified in 3.3.1. e. Maximum allowable shelf
35、life interval of the primer coated metal prior to adhesive application and any primer reactivation procedure, if applicable. f. Maximum allowable storage life of adhesive coated metal prior to assembly and curing, and the maximum storage temperature. g. Recommended maximum time, temperature and pres
36、sure for each segment of the complete curing cycle and the number of permissible re-cures for multiple bonding of assemblies. h. The necessary safety precautions to be taken when using the adhesive and any related primer. 3.7 Workmanship: The film adhesive shall be free of folds, foreign matter and
37、wrinkles, and shall not have more than two holes of 1/8 inch maximum diameter per square inch which penetrate through the film. 4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for inspection: Unless otherwise specified in the contract or purchase order, the contractor is responsible for the perf
38、ormance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The
39、Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. SAE INTERNATIONAL AMS-A-25463 Page 7 of 21 4.2 Classification of inspection: The inspection r
40、equirements specified herein are classified as follows: a. Qualification inspection (see 4.3). b. Quality conformance inspection (see 4.4). 4.3 Qualification inspection: The qualification inspection shall consist of all the tests specified in table II. 4.3.1 Qualification test samples: Qualification
41、 test samples shall consist of test specimens bonded as specified in 4.3.4 through 4.3.4.4.2 prepared from 30 square feet of adhesive film. The film shall be packaged as specified in section 5. Included as part of the sample shall be the adhesive primer, if required. All specimens and the remaining
42、film shall be forwarded to the Qualifying Laboratory Commander, Naval Air Development Center, Warminster, PA 18974, Attention: ACSTD (Code 6062). The sample (test specimens and adhesive film) shall be plainly and durably marked with the following information: SAMPLE (SPECIMEN OR ADHESIVE FILM) FOR Q
43、UALIFICATION TESTING ADHESIVE, FILM FORM, METALLIC STRUCTURAL SANDWICH CONSTRUCTION Type, class, cure group. Name and address of manufacturer. Plant address and date adhesive film was produced. Manufacturers code number or identification. Submitted by (name) for qualification in accordance with the
44、requirements of MIL-A-254638 under authorization (reference authorizing letter). 4.3.2 Manufacturers data: 4.3.2.1 Test reports: Two copies of the manufacturers certified test report shall be forwarded with the qualification sample. The report shall show, by actual test results and specific paragrap
45、h references, the adhesive film submitted conforms to all the requirements of this specification. 4.3.2.2 Instructions for use: The manufacturer shall submit 2 copies of the instruction sheet specified in 3.4. 4.3.3 Retention of qualification: In order to retain qualification of a product approved f
46、or listing on the Qualified Products List (QPL), the manufacturer shall verify by certification to the qualifying activity that the manufacturers product complies with the requirements of this specification. The time of periodic verification by certification shall be in two-year intervals from the d
47、ate of original qualification. The Government reserves the right to re-examine the qualified product whenever deemed necessary to determine that the product continues to meet any or all of the specification requirements. SAE INTERNATIONAL AMS-A-25463 Page 8 of 21 4.3.4 Test specimen preparation: 4.3
48、.4.1 Sandwich panel weight: The total weight of the adhesive systems (both facings) shall be the minimum recommended by the adhesive manufacturer, +5, -0 percent and shall not exceed 0.250 pounds per square foot (psf) for types I and II or 0.40 psf for type Ill or IV adhesives. 4.3.4.2 Peel test spe
49、cimens: A sufficient number of sandwich panels shall be prepared to yield 18 - 3 by 12-inch specimens for peel testing. The panels shall be prepared with 0.020 0.002-inch, 2024-T3 aluminum facings conforming to QQ-A-250/4 bonded to 0.50-inch thick aluminum core conforming to code 7.9-1/4-40(5052) of MIL-C-7438 using the adhesive system undergoing test. The panels shall be fabricated and cut so that
