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 there
2、from, 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 2014 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside USA) 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/AMS3325F AEROSPACE MATERIAL SPECIFICATION AMS3325 REV. F Issued 1963-07 Reaffirme
5、d 2001-04 Revised 2014-05 Superseding AMS3325E Fluorosilicone (FVMQ) Rubber Fuel and Oil Resistant 55 - 65 RATIONALE AMS3325F is a Five Year Review and update of this specification. Replaced low temperature brittleness test with low temperature retraction test. 1. SCOPE 1.1 Form This specification c
6、overs a fluorosilicone (FVMQ) rubber in the form of sheet, strip, tubing, extrusions, and molded 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 usa
7、ble over a temperature range of -76 to +302 F (-60 to +150 C); each application, however, has to 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 materia
8、ls, this specification does not address the hazards which may be involved in such use. It is the 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
9、 involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of 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
10、referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE INTERNATIONAL AMS3325F Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-
11、7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products AMS3021 Fluid, Reference, for Testing Di-Ester (Polyol) Resistant Material 2.2 ASTM Publications Available from ASTM International,
12、100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM 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
13、and Thermoplastic Elastomers - Tension ASTM D 471 Standard Test Methods for Rubber Property Effect of Liquids 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 AST
14、M D 1329 Evaluating Rubber Property Retraction at Lower Temperature (TR Test) 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 t
15、he requirements of 3.2. 3.2 Properties The product shall conform to requirements shown in Table 1; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable. SAE INTERNATIONAL AMS3325F Page 3 of 6 TABLE 1 - PROPERTIES Paragraph Property Re
16、quirement Test Method 3.2.1 Hardness, Durometer “A“ 60 5 ASTM D 2240 3.2.2 Tensile Strength, minimum 800 psi (5.52 MPa) ASTM D 412, Die C 3.2.3 Elongation, minimum 150% ASTM D 412, Die C 3.2.4 Tear Resistance, minimum 50 pounds force per inch (8.76 kN/m) ASTM D 624, Die C 3.2.5 Specific Gravity Prep
17、roduction Value 0.03 ASTM D 297 3.2.6 Diester Oil Resistance (Immediate Deteriorated Properties) ASTM D 471 AMS3021 Temperature: 302 F 5 (150 C 3) Time: 70 hours 0.5 3.2.6.1 Hardness Change, Durometer “A“ 15 3.2.6.2 Tensile Strength Change, maximum -50% 3.2.6.3 Elongation Change, maximum -40% 3.2.6.
18、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”, maximum -15 3.2.7.2 Tensile Strength Change, maximum -50% 3.2.7.3 Elongation Chang
19、e, 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” -5 to +10 3.2.8.2 Tensile Strength Change, maximum -30% 3.2.8.3 Elongation Change, maximum -25% 3.2.9 Compression Set ASTM D
20、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 Temperature Retraction , TR10point, max -65 F(-54 C) ASTM D 1329, 3.3 Quality The product, as received by purchaser, shall be uniform in quality and condition, smooth, as free fr
21、om 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. SAE INTERNATIONAL AMS3325F Page 4 of 6 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manuf
22、acturer 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 necessary to ensure that the product conforms to specified requirements. 4.2 Cl
23、assification 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 Hardness Tensile Strength Elongation Volume Change in Fuel Compression Set Quality 3.2.1 3.2.2 3.2.3 3.2.7.4
24、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 in ingredients and/or processing requires reapproval as in 4.2.2.1, and when purchaser deems confirmatory
25、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 used on the approved sample. If necessary to make any change in ingredients, in type of equipment for proce
26、ssing, 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. Production product made by the revised procedure shall not be shipped prior to receipt of reapproval. 4.3 Samplin
27、g and Testing 4.3.1 For 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 specified in the applicable test procedure or, if not specified therein, not less than three. 4.3.1.1 If spe
28、cimens 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 shape that suitable test specimens cannot be cut from the product, a separate flat strip test sample, fro
29、m 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, mechanically slit and flattened into a strip while being extruded, and cured in the same manner as producti
30、on 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 compound, shall be supplied upon request. 4.3.1.2 A lot shall be all product from the same batch of compound
31、 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. Blending of previously compounded material is prohibited. SAE INTERNATIONAL AMS3325F Page 5 of 6 4.3.1.4 Final inspection
32、 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. TABLE 3 VISUAL AND DIMENSIONA
33、L INSPECTION Lot Size Sample Size 2 to 8 Entire Lot 9 to 90 8 91 to 150 12 151 to 280 19 281 to 500 21 501 to 1200 27 1201 to 3200 35 3201 to 10,000 38 10,001 to 35,000 46 35,001 to 150,000 56 150,001 and and Over 65 4.3.2 Preproduction Tests As agreed upon by purchaser and manufacturer. 4.4 Approva
34、l 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. If necessa
35、ry 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 shall us
36、e 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 within establ
37、ished limits Sequence of mixing compound ingredients Type of mixing equipment Method and equipment for preparing preforms Basic molding procedure (compression, transfer, injection) Curing temperature, 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, AMS3325F, manufacturers compound number, form and size or pa
40、rt number, and quantity. SAE INTERNATIONAL AMS3325F Page 6 of 6 4.6 Resampling and Retesting If any specimen specimen means one single sample coupon or test piece used in the above tests fails to meet the specified requirements, disposition of the product may be based on the results of testing three
41、 additional specimens for each original nonconforming specimen. 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
42、stated on the purchase order or contract requirement, when no requirements are stipuated, 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
43、Supplier shall mention this specification number and its revision 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 (|) loca
44、ted in the left margin is for the convenience of the user in 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 revi
45、sions. Change bars and (R) are not used in original publications, 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 a
46、pproximate equivalents of the primary units and are presented only for information. 8.3 Purchase documents should specify not less than the following: AMS3325F 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“
