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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 ther
2、efrom, 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 2009 SAE International All rights reserved. No part of this publication
3、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: 724-776-4970 (outside USA
4、) 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/AMS3325E AEROSPACE MATERIAL SPECIFICATION AMS3325E Issued 1963-07 Reaffirmed 2001-04 Revised 20
5、09-05 Superseding AMS3325D (R) Fluorosilicone (FVMQ) Rubber Fuel and Oil Resistant 55 - 65 RATIONALE AMS3325E is a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a fluorosilicone (FVMQ) rubber in the form of sheet, strip, tubing, extrusions, and molded
6、 shapes. 1.2 Application These products have been used typically for parts requiring resistance to jet fuel and lubricating oils, but usage is not limited to such applications. Generally, products are usable over a temperature range of -76 to +302 F (-60 to +150 C); each application, however, has to
7、 be considered individually. 1.3 Safety-Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the
8、 sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of
9、 the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last
10、published issue of that document shall apply. SAE AMS3325E Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products A
11、MS2810 Identification and Packaging, Elastomeric Products AMS3021 Fluid, Reference, for Testing Di-Ester (Polyol) Resistant Material 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM
12、D 297 Standard Test Methods for Rubber Products Chemical Analysis ASTM D 395 Standard Test Methods for Rubber Property - Compression Set ASTM D 412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 471 Standard Test Methods for Rubber Property - Effect of Liqu
13、ids ASTM D 573 Standard Test Methods for Rubber Deterioration - in an Air Oven ASTM D 624 Standard Test Methods for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers ASTM D 2137 Standard Test Methods for Rubber Property - Brittleness Point of Flexible Polymers and Coated F
14、abrics ASTM D 2240 Standard Test Methods for Rubber Property - Durometer Hardness 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a compound, based on a fluorosilicone (FVMQ) elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Properties The product shall conform to r
15、equirements shown in Table 1, 3.2.11, and 3.2.12; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable. TABLE 1 - PROPERTIES Paragraph Property Requirement Test Method 3.2.1 Hardness, Durometer “A“ or equivalent 60 5 ASTM D 2240 3.2.2
16、 Tensile Strength, minimum 800 psi (5.52 MPa) ASTM D 412, Die B or C 3.2.3 Elongation, minimum 150% ASTM D 412, Die B or C 3.2.4 Tear Resistance, minimum 50 pounds force per inch (8.76 kN/m) ASTM D 624, Die B or C 3.2.5 Specific Gravity Preproduction Value 0.03 ASTM D 297 3.2.6 Die-Ester Oil Resista
17、nce (Immediate Deteriorated Properties) ASTM D 471 AMS 3021 Temperature: 302 F 5 (150 C 3) Time: 70 hours 0.5 3.2.6.1 Hardness Change, Durometer “A“ or equivalent 15 -,-,- SAE AMS3325E Page 3 of 6 TABLE 1 - PROPERTIES (CONTINUED) Paragraph Property Requirement Test Method 3.2.6.2 Tensile Strength Ch
18、ange, maximum -50% 3.2.6.3 Elongation Change, maximum -40% 3.2.6.4 Volume Change +1 to +15% 3.2.7 Aromatic Fuel Resistance (Immediate Deteriorated Properties) ASTM D 471 ASTM Ref. Fuel B Temperature: 68 to 86 F (20 to 30 C) Time: 22 hours 0.5 3.2.7.1 Hardness Change, Durometer “ A” or equivalent, ma
19、ximum -15 3.2.7.2 Tensile Strength Change, maximum -50% 3.2.7.3 Elongation Change, maximum -40% 3.2.7.4 Volume Change +1 to +25% 3.2.8 Dry Heat Resistance ASTM D 573 Temperature: 437 F 5 (225 C 3) Time: 22 hours 0.5 3.2.8.1 Hardness Change, Durometer “ A” or equivalent -5 to +10 3.2.8.2 Tensile Stre
20、ngth Change, maximum -30% 3.2.8.3 Elongation Change, maximum -25% 3.2.9 Compression Set ASTM D 395, Method B Temperature: 347 F 5 (175 C 3) Time: 22 hours 0.5 3.2.9.1 Percent of Original Deflection, maximum 45 3.2.10 Low-Temperature Brittleness Pass ASTM D 2137, Method A Temperature: -80 F 5 (-62 C
21、3) 3.3 Quality The product, as received by purchaser, shall be uniform in quality and condition, smooth, as free from foreign material as commercially practicable, and free from imperfections detrimental to usage of the product. 3.4 Tolerances Shall conform to all applicable requirements of AMS2279.
22、 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manufacturer of the product shall supply all samples for required tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed nec
23、essary to ensure that the product conforms to specified requirements. -,-,- SAE AMS3325E Page 4 of 6 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for requirements shown in Table 2 are acceptance tests and shall be performed on each lot. TABLE 2 - ACCEPTANCE TESTS Requirement Paragraph Ha
24、rdness Tensile Strength Elongation Volume Change in Fuel Compression Set Quality 3.2.1 3.2.2 3.2.3 3.2.7.4 3.2.9 3.3 4.2.2 Preproduction Tests All technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of a product by the manufacturer, when a change
25、 in ingredients and/or processing requires reapproval as in 4.2.2.1, and when purchaser deems confirmatory testing to be required. 4.2.2.1 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production product which are essentially the same as those
26、used on the approved sample. If necessary to make any change in ingredients, in type of equipment for processing, or in manufacturing procedures, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing, and, when requested, sample product. Produc
27、tion product made by the revised procedure shall not be shipped prior to receipt of reapproval. 4.3 Sampling and Testing 4.3.1 Acceptance Tests Sufficient product shall be taken at random from each lot to perform all required tests. The number of determinations for each requirement shall be as speci
28、fied in the applicable test procedure or, if not specified therein, not less than three. 4.3.1.1 If specimens cannot be prepared from the product, ASTM test specimens prepared from the same batch and state of cure shall be used for required tests. When the product supplied is an extrusion of such sh
29、ape that suitable test specimens cannot be cut from the product, a separate flat strip test sample, from the same production lot, shall be supplied upon request. This strip shall be prepared from tubing 1.000 inch 0.063 (25.40 mm 1.60) in OD by 0.075 inch 0.008 (1.90 mm 0.20) in wall thickness, mech
30、anically slit and flattened into a strip while being extruded, and cured in the same manner as production product. When the product is a molded shape from which test specimens cannot be cut, a slab 6 inches (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick, molded from the same batch of compo
31、und, shall be supplied upon request. 4.3.1.2 A lot shall be all product from the same batch of compound produced in one continuous run and presented for manufacturers inspection at one time. 4.3.1.3 A batch shall be the quantity of compound run through a mill or mixer at one time. SAE AMS3325E Page
32、5 of 6 4.3.1.4 Final inspection Sampling Plan; A statistical sampling plan acceptable to the purchaser may be used in lieu of sampling as in 4.3.1. Sample size for visual and dimensional requirements shall be shown in Table 3; sample unit shall be one molded part and acceptance based on zero defects
33、. TABLE 3 VISUAL AND DIMENSIONAL INSPECTION Lot Size Sample Size 2 to8Entire Lot 9 to908 91 to15012 151 to28019 281 to50021 501 to 120027 1201 to320035 3201 to10,00038 10,001 to35,00046 35,001 to150,00056 150,001andand Over65 4.3.2 Preproduction Tests As agreed upon by purchaser and manufacturer. 4.
34、4 Approval 4.4.1 Manufacturer shall establish for each size of part, parameters for the process control factors which will produce parts meeting the technical requirements of this specification. These shall constitute the approved procedures and shall be used for manufacturing production of parts. I
35、f necessary to make any changes in the parameters for process control factors, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients, and/or processing. Products manufactured using a revised procedure shall be shipped prior to reapproval in writing. Manufacturer
36、 shall use ingredients, manufacturing procedures, processes, and methods of inspection, which are essentially the same as those used on the approved sample. 4.4.1.1 Control factors for producing products include but are not limited to, the following: Compound ingredients and proportions thereof with
37、in established limits Sequence of mixing compound ingredients Type of mixing equipment Method and equipment for preparing preforms Basic molding procedure (compression, transfer, injection) Curing time and pressure; variations of +/- 10% are permissible Finishing methods Methods of inspection 4.4.1.
38、2 Any of the above process control factors for which parameters are considered proprietary by the manufacturer may be assigned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.5 Reports The supplier of the product shall furnish with each shipment
39、 a report showing the results of tests to determine conformance to the acceptance test requirements and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS3325E, manufacturers compound number, form and size or pa
40、rt number, and quantity. -,-,- SAE AMS3325E Page 6 of 6 4.6 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, disposition of the product may be based on the results of testing three additional specimens for each original nonconforming specimen
41、. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the product represented. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification and Packaging Shall be as stated on the purchase order or contract requirement, when no
42、requirements are stipulated, packaging shall be in accordance with AMS2810. 5.1.1 A lot of product may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. 6. ACKNOWLEDGMENT Supplier shall mention this specification number and its revi
43、sion letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (l) 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 document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publicati
45、ons, nor in documents that contain editorial changes only. 8.2 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented
46、 only for information. 8.3 Purchase documents should specify not less than the following: AMS3325E Form and size or part number of product desired Quantity of product desired Special packaging if required 8.4 Similar Specification MIL-DTL-25988, Type II, Class 1, Grade 60, is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. PREPARED BY AMS COMMITTEE “CE“ -,-,-