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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication m
3、ay 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/AMS3353 AEROSPACE MATERIAL SPECIFICATION AMS3353 Issued 2009-04 Rubber: Fluorocarbon Elastomer (
5、FKM) 70 to 80 Hardness, Low Temperature Sealing Tg -40g113F (-40g113C) For Elastomeric Parts in Aircraft Engine Oil, Fuel and Hydraulics Systems RATIONALE Specification covers a grade of fluoroelastomer capable of meeting a glass transition (Tg) value of 40g113F (40g113C). 1. SCOPE 1.1 Form This spe
6、cification covers high temperature, compression set and fluid resistant fluorocarbon elastomer material to be used in the form of sheet, strip, tubing, extrusions and molded shapes for aeronautical and aerospace applications. This specification should not be used to address products such as O-rings,
7、 compression seals, O-ring cord, and molded-in-place gaskets. For those applications AMS7379 should be used. 1.2 Application These products have resistance to a variety of gas turbine engine oils, including high thermal stability (HTS) oils, fuels, and hydraulic fluids, but usage is not limited to s
8、uch applications. Each application should be considered separately. This fluorocarbon (FKM) has a service temperature range of -60 to +400g113F (-51 to +204g113C) in air. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specif
9、ication may involve the use of hazardous materials, 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
10、 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 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
11、a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE AMS3353 Page 2 of 7 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warren
12、dale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org AMS2817 Packaging and Identification, Preformed Packings AMS2279 Tolerances, Rubber Products AMS7379 Rubber: Fluorocarbon Elastomer (FKM), 70 to 80 Hardness, Low Temp Sealing Tg -40F (-40C) For
13、Elastomeric Seals in Aircraft Engine Oil, Fuel and Hydraulic Systems 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 D 297 Rubber Products - Chemical Analysis ASTM D 395 Rubber Proper
14、ty - Compression Set ASTM D 412 Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 471 Rubber Property - Effects of Liquids ASTM D 573 Rubber - Deterioration in an Air Oven ASTM D 1329 Rubber Property - Retraction at Lower Temperatures (TR Test) ASTM D 1418 Standard Practice for Rubber
15、and Rubber Latices - Nomenclature ASTM D 2240 Rubber Property - Durometer Hardness ASTM D 3418 Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry 3. TECHNICAL REQUIREMENTS 3.1 Material The product shall be pr
16、epared from ingredients as shall be necessary to achieve the requirements detailed in this standard. The composition is not defined by this standard. The basic ingredient shall be based on 100% virgin fluorocarbon (FKM) elastomer meeting ASTM D1418 Type 3. No reprocessed or non-fluorocarbon polymer
17、is acceptable. 3.2 Properties The product shall conform to the requirements shown in Table 1. Whenever possible, tests shall be performed on the product supplied and in accordance with ASTM Test Methods, insofar as practicable or alternately on ASTM test slabs molded and processed under the same con
18、ditions as the product supplied. (ref. 4.2.1.4) TABLE 1 PROPERTIES Property Requirements Test Method 3.2.1 Hardness, Durometer “A” or Equivalent 75 g114g35 ASTM D 2240 3.2.2 Tensile Strength, min 1600 psi (11.02 Mpa) ASTM D 412 3.2.3 Elongation, min 120% ASTM D 412 3.2.4 Specific Gravity Qualificati
19、on Value g114 0.02 ASTM D 297, hydrostatic method 3.2.5 Low-Temperature Resistance Temperature Retraction, (TR10), F (C ) max -37 (-38.3) ASTM D 1329 (use test slab as specimen) 3.2.6 Low-Temperature Resistance Glass Transition (Tg) Mid-Point, max F (C ) -40 (-40) ASTM D 3418 3.2.7 Aromatic Fuel Res
20、istance ASTM D 471 ASTM Reference Fuel B 73F g114g35 (23 C g114g32) 70 hours g114g30.5 SAE AMS3353 Page 3 of 7 TABLE 1 PROPERTIES (CONTINUED) Property Requirements Test Method 3.2.7.1 Hardness Change, Durometer “A” or Equivalent -10 3.2.7.2 Tensile Strength Change, max -35% 3.2.7.3 Elongation Change
21、, max -20% 3.2.7.4 Volume Change, max 1 to +10% 3.2.8 Turbine Engine Oil Resistance ASTM D 471 (Note 1) AMS3085 (Reference Oil 300) 392F g114g35 (200C g114g32) 70 hours g114g30.5 3.2.8.1 Hardness Change, Durometer “A” or Equivalent -10 3.2.8.2 Tensile Strength Change, max -30% 3.2.8.3 Elongation Cha
22、nge, max -20% 3.2.8.4 Volume Change, max 0 to +10% 3.2.8.5 Compression Set, max 25% ASTM D 395 Method B AMS3085 (Reference Oil 300) 392F g114g35 (200C g114g32) 70 hrs g114g30.5 3.2.8.6 Long Term Compression Set, max 55% ASTM D 395 Method B AMS3085 (Reference Oil 300) 392F g114g35 (200C g114g32) 336
23、hours g114g30.5 3.2.9 Hydraulic Fluid Resistance ASTM D 471 (Note 1) Mil-PFR-83282 275F g114g35 (135C g114g32) 70 hours g114g30.5 3.2.9.1 Hardness Change, Durometer “A” or Equivalent -7 3.2.9.2 Tensile Strength Change, max -25% 3.2.9.3 Elongation Change, max -15% 3.2.9.4 Volume Change, max +6% 3.2.9
24、.5 Compression Set, max 20% ASTM D 395 Method B Mil-PFR-83282 275F g114g35 (135C g114g32) 70 hours g114g30.5 3.2.9.6 Long Term Compression Set, max 40% ASTM D 395 Method B Mil-PFR-83282 275F g114g35 (135C g114g32) 336 hours g114g30.5 3.2.10 Dry Heat Resistance ASTM D 573 518F g114g35 (270C g114g32)
25、70 hours g114g3g19g175 3.2.10.1 Hardness Change, Durometer “A” or Equivalent -10 to +5 3.2.10.2 Tensile Strength Change, max -45% 3.2.10.3 Elongation Change, max -15% 3.2.10.4 Weight Loss, max 10% 4.4.1 3.2.10.5 Compression Set, % of Original Deflection, max 20% ASTM D 395 Method B 392F g114g35 (200
26、C g114g32) 22 hours g114g30.5 3.2.10.6 Long Term Compression Set, max 55% ASTM D 395, Method B 392F g114g35 (200C g114g32) 336 hours g114g30.5 Note 1: Do not dip specimens in acetone; blot dry residual oil from specimen. SAE AMS3353 Page 4 of 7 3.3 Quality Product, as received by purchaser, shall be
27、 uniform in quality and condition, smooth, as free from foreign material as commercially practicable, and free from internal imperfections detrimental to usage of the product. 3.4 Dimensions and Tolerances Products made from this material shall conform to all applicable requirements of AMS2279. 3.5
28、Toxicological Formulations The material shall have no adverse effects on the health of personnel when used for its intended purpose in accordance with manufacturers instructions and with appropriate handling procedures. 4. QUALITY ASSURANCE 4.1 Responsibility for Inspection The manufacturer of the p
29、roduct shall be responsible for performance of all required tests. Purchaser reserves the right to sample and perform any testing deemed necessary to ensure that the product conforms to the AMS requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Each lot of product shall conform to Tabl
30、e 2. TABLE 2 INITIAL ACCEPTANCE TESTS Requirement Paragraph Hardness 3.2.1 Tensile Strength 3.2.2 Elongation 3.2.3 Specific Gravity 3.2.4 Compression Set 3.2.10.5 Quality 3.3 Dimensions and Tolerances 3.4 4.2.1.1 Lot A quantity of one size of product processed and packaged as one production entity f
31、rom a batch. 4.2.1.2 Batch A quantity of compound run through a mill or mixer at one time. 4.2.1.3 Random Sampling The method shall be specified in the parts standard, drawing or purchase document. If not specified, product shall be taken at random from each lot to perform all the required acceptanc
32、e tests. The number of test iterations for each requirement shall be specified in the applicable test procedure or if not specified therein, not less than three. SAE AMS3353 Page 5 of 7 4.2.1.4 Sample Shall be end product or specimens cut from the end item whenever possible. If at all possible hardn
33、ess, specific gravity, and compression set testing shall be conducted on the end item. If these items are unsuitable for use as test samples, ASTM test specimens prepared from the same batch and state of cure as the end item shall be used. When the product supplied is an extrusion of such shape that
34、 suitable test specimens cannot be cut from the product, a separate flatstrip test sample from the same production lot shall be supplied upon request. This strip shall be prepared from tubing 1.000 inch +/- 0.063 (25.4 mm +/- 1.60) in OD by 0.075 inch +/- 0.008 (1.90 mm +/- 0.20 mm) in wall thicknes
35、s, mechanically slit and flattened into a strip while being extruded, and cured in the samemanner as production product. When the product is a molded shape from which test specimens cannot be cut, a slab 6 inches (152 cm) square by 0.075 inch +/- 0.008 (1.90 mm +/- 0.20) thick molded from the same b
36、atch of compound shall be supplied upon request. 4.2.2 Final Inspection sampling plan The sample size for visual and dimensional requirements shall be as indicated in Table 4. Sample unit shall be one molded part and acceptance based on zero defects. TABLE 4 FINAL INSPECTION SAMPLE SIZE Lot Size Sam
37、ple 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 over 65 4.3 Test Methods 4.3.1 Weight Loss Tests The weight loss test shall be conducted on samples air-aged at 518 F g1
38、14 5 (270C g114g32). Test specimens shall be conditioned for 24 hours g114 0.5 in a desicator before and after air aging. The specimens shall be weighed immediately after the desiccation period before and after aging. The percentage weight loss shall be calculated as shown in Equation 1. 100*121WWWL
39、ossWeightPercentageg16g32 (1) Where 1W= weight of sample before air-aging 2W= weight of sample after air-aging SAE AMS3353 Page 6 of 7 4.4 Approval 4.4.1 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production product which are essentially the
40、 same as those used on the qualification sample. If any change in ingredients, in type of equipment for processing, or in manufacturing procedures is necessary, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample p
41、roduct. Production product made by the revised procedure shall not be shipped prior to receipt of re-approval. 4.4.2 Manufacturer shall establish, for each size of product, parameters for the process control factors which will produce products meeting the technical requirements of this specification
42、. These shall constitute the approved procedures and shall be used for manufacturing production of products. If necessary to make any change in parameters for the process control factors, manufacturer shall submit for re-approval a statement of the proposed changes in ingredients and/or processing.
43、When requested, sample product shall be submitted in accordance with the provisions of 4.1. Products manufactured using a revised procedure shall not be shipped prior to re-approval of qualification in writing. 4.4.2.1 Control factors for producing product include, but are not limited to, the follow
44、ing: Compound ingredients and proportions thereof within established limits Sequence of mixing compound ingredients Type of mixing equipment Method and equipment for preparing preforms Basic molding procedure (compression, transfer, injection) Cure time, cure temperature, and cure pressure; variatio
45、ns of 10% are permissible Post cure time and post cure temperature; variations of 10% are permissible Finishing methods Methods of inspection 4.5 Reports The supplier of the product shall make readily available a report showing the results of tests to determine conformance to the acceptance requirem
46、ents and stating that the product conforms to the other technical requirements. This report shall include AMS number with revision, manufacturers identification and product designation, batch/lot number and date of manufacture. For products requiring source inspection, reports shall be stamped by th
47、e third party source inspector. 4.6 Resampling and Retesting If any specimen fails, a retesting of three additional specimens for each nonconforming specimen shall be necessary for product acceptance. The same batch/lot of product used for the failed test shall be used for retesting. Failure of any
48、retest specimen shall be cause for rejection. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification shall be as specified in the parts standard, drawing or purchase document. If not specified, shall be as follows: Packaging shall be in accordance with A
49、MS2817. A lot may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. SAE AMS3353 Page 7 of 7 5.1.1 Each package, box and shipping container shall be permanently and legibly marked with the following when pertinent: Specification title AMS3353 Manufacturers identification Manufacturers product designation Batch/lot number
