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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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 2007 SAE InternationalAll rights reserved. No part of this publication may be
3、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)Fax: 724-
4、776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgSilicone Rubber, Fiberglass Fabric ReinforcedRATIONALEThis document has been reaffirmed to comply with the SAE 5-year Review policy.1. SCOPE:1.1 Form: This specification covers a fiberglass reinforced silicone rubber in the form of sheet
5、, strip, and molded parts.1.2 Application: These products have been used typically for grommets or anti-chafing cushions between metal surfaces operating at temperatures between -55 to +290 C (-67 to +554 F), with occasional short time exposure to 315 C (599 F), but usage is not limited to such appl
6、ications. Each application should 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 b
7、e 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 involved. AEROSPACE MATERIAL SPECIFICATIONAMS 3352BIssued FEB
8、1995Revised MAY 2000Reaffirmed JUN 2007Superseding AMS 3352ACopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 2 -2. APPLICABLE DOCUMENTS: The issue of the following documents i
9、n effect on the date of the purchase order form 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 bee
10、n specified, the last published issue of that document shall apply.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 4943 Titanium Alloy Hydraulic, Seamless, Tubing, 3.0A1 - 2.5V, AnnealedAS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft
11、2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 395 Rubber Property-Compression SetASTM D 412 Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers - TensionASTM D 471 Rubber Property-Effect of LiquidsASTM D 573 Rubber-Det
12、erioration in Air OvenASTM D 624 Tear Strength of Conventional Vulcanized Rubber and Thermoplastic ElastomersASTM D 2240 Rubber Property-Durometer Hardness3. TECHNICAL REQUIREMENTS: 3.1 Material: Shall be a fiberglass fabric reinforced silicone rubber compound suitably cured to produce a product mee
13、ting the requirements of 3.2.1 through 3.2.9, inclusive, and, when specified by purchaser, the requirements of 3.2.10, 3.2.11, and 3.2.12.3.2 Properties: The product shall conform to requirements shown in Table 1, determined on parts or on sheet product representative of the parts, as applicable.Cop
14、yright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 3 -TABLE 1 - Properties Property Requirement Test Method3.2.1 Hardness, Durometer “A” 55 to 70 ASTM D 22403.2.2 Tensile Strength,
15、 min 600 psi(4.14 MPa)ASTM D 412,3.2.3 Elongation, min 30% ASTM D 4123.2.4 Tear Strength, min 250 pounds force/inch(43.8 kN/m)ASTM D 624, Die B3.2.5 Dry Heat Resistance: ASTM D 573315 C 3(599 F 5)168 hours 0.53.2.5.1 Hardness Change, Durometer “A” 0 to +25 ASTM D 22403.2.5.2 Tensile Strength, min 60
16、0 psi(4.14 MPa)ASTM D 4123.2.5.3 Elongation, min 25% ASTM D 4123.2.5.4 Tear Strength, min 200 pounds force/inch(35.0 kN/m)ASTM D 624, Die B3.2.5.5 Weight Change, max -30% ASTM D 4713.2.5.6 Test specimen bent through an angle of 180 degrees around a mandrel with diameter equal to four times the thick
17、ness of thespecimen (4T)Shall exhibitno cracks3.2.6 Hydraulic Fluid Resistance: ASTM D 471AS1241, Type IV, CL 1, Grade A24 C 3(75 F 5)24 hours 0.53.2.6.1 Hardness Change, Durometer “A” -15 to 0 ASTM D 22403.2.6.2 Volume Change, max +15% ASTM D 4713.2.6.3 Test specimen bent through an angle of 180 de
18、grees around a 4T diameter mandrelShall exhibitno cracksCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 4 -3.2.7 Hydraulic Fluid Splash Resistance: ASTM D 471AS1241, Type IV,
19、 CL 1, Grade A24 C 3(75 F 5)5 minutes 13.2.7.1 Test specimen bent through an angleof 180 degrees around a 4T diametermandrel after 10 wetting/heating cycles Shall exhibitno cracksTest condition of3.2.7 PlusAir260 C 3(500 F 5)2 hours 0.13.2.8 Compression Set: ASTM D 395,Method B250 C 3(500 F 5)24 hou
20、rs 0.53.2.8.1 Percent of Original Thickness, max 253.2.9 Flammability:DrippingFlame time, maxBurn length, maxNone30 seconds3.8 cm (1.5 inch)4.5.13.2.10 Lubricating Oil Splash Resistance ASTM D 471AMS 3023 (ARM 200)24 C 3(75 F 5)5 minutes 13.2.10.1 Hardness Change, Durometer “A” -6 to 03.2.10.2 Volum
21、e Change, max +20%3.2.10.3 Test specimen bent through anangle of 180 degrees arounda 4T diameter mandrelafter 10 wetting/heating cyclesShall exhibitno cracksTest conditionsof 3.2.10 PlusAir150 C 3(302 F 5)2 hours 0.1TABLE 1 - Properties (Continued) Property Requirement Test MethodCopyright SAE Inter
22、national Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 5 -3.6 Quality: Product, as received by purchaser, shall be uniform in quality and condition, smooth, as free of foreign material as commercially
23、 practicable, and free of imperfections detrimental to usage of the product.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for Inspection: The manufacturer shall supply all samples for required tests and shall be responsible for the performance of all required tests. Purchaser reserves the righ
24、t to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the specified requirements.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Hardness (3.2.1), tensile strength (3.2.2), elongation (3.2.3), and tear strength (3.2.4) are acceptance tests a
25、nd shall be performed on each lot.4.2.2 Preproduction Tests: All technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of product by the manufacturer, when a change in ingredients and/or processing requires reapproval as in 4.4.1, and when purchase
26、r deems confirmatory testing to be required.3.2.11 Fuel Splash Resistance ASTM D 471ASTM Ref. Fuel B24 C 3(75 F 5)5 minutes 13.2.11.1 Hardness Change, Durometer “A” -5 to 03.2.11.2 Volume Change, max -3%3.2.11.3 Test specimen bent through an angleangle of 180 degrees around a 4T diameter mandrel aft
27、er10 wetting/heating cycles.Shall exhibitno cracks Test conditionsof 3.2.11 PlusAir39 C 0.6(100 F 1)2 hours 0.13.2.12 Titanium Compatibility,AppearanceNo cracking or pitting 4.5.2TABLE 1 - Properties (Continued) Property Requirement Test MethodCopyright SAE International Provided by IHS under licens
28、e with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 6 -4.3 Sampling and Testing: Shall be as follows:4.3.1 For Acceptance Tests: Sufficient product shall be taken at random from each lot to perform all required tests; the number of de
29、terminations 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 A lot shall be all product produced from the same batch of compound processed in one continuous run and presented for manufacturers inspection at one tim
30、e.4.3.1.2 A statistical sampling plan, acceptable to purchaser, may be used in lieu of sampling as in 4.3.1.4.3.2 For Preproduction Tests: Shall be acceptable to purchaser or as stated in the contract.4.4 Approval: 4.4.1 Sample product shall be approved by purchaser before product for production use
31、 is supplied, unless such approval is waived by purchaser. Results of tests on production product shall be essentially equivalent to those on the approved sample. Production product made by a revised procedure shall not be shipped prior to receipt of reapproval. If necessary to make any change in pa
32、rameters for the process control factors, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample product.4.4.2 Manufacturer of the product shall make no significant change in material, processes, or control factors fr
33、om those on which the approval was based, unless the change is approved by the cognizant engineering organization. A significant change is one which, in the judgment of the cognizant engineering organization, could affect the properties or performance of the product.4.4.2.1 Control factors for produ
34、cing products include, but are not limited to, the following: Compound ingredients and proportions thereof within established limitsSequence of mixing compound ingredientsType of mixing equipmentMethod and equipment for preparing preformsBasic molding procedure (compression, transfer, injection)Curi
35、ng time and pressure; variations of 10% are permissibleFinishing methodsMethods of inspection.4.4.2.2 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
36、 modified code designation.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 7 -4.5 Test Methods: 4.5.1 Flammability: Three test specimens shall be straightened until flat and
37、held at 25 C 3 (75 F 5) and 50% 15 relative humidity, or equivalent, for 24 hours prior to testing. A burner with a nominal 0.375 inch (9.52 mm) I.D. tube shall be adjusted to produce a 1.5 inch (38 mm) flame with a flame temperature of 845 C (1553 F) or higher. Measurement of flame temperature shal
38、l be accomplished by a calibrated thermocouple in the center of flame. The specimen shall be held firmly in the vertical position with the lower edge of the rubber cushion 0.75 inch (19 mm) above the top edge of the burner. The flame shall be applied to the centerline of the lower edge of the cushio
39、n for 12 seconds and then removed. The flame time (seconds) and burn lengths (tenths of inch (mm) shall be measured, recorded, and averaged.4.5.2 Titanium Compatibility: Five samples of silicone rubber cushion material shall be mounted on a 0.625 inch (15.88 mm) OD AMS 4943 titanium alloy tube havin
40、g a nominal wall thickness of 0.028 inch (0.71 mm). When using loop or block clamp configurations there shall be no spacer between feet. The cushion material shall be mounted in direct contact with the surface of the tube. The tube shall be heated to 290 C 3 (554 F 5) and held at temperature for 288
41、 hours 0.5. The test apparatus shall be removed and the tube shall be exposed to a temperature of 70 C 3 (158 F 5) and 95% +5, -15 relative humidity for 480 hours 0.5. The cushions shall be removed and examined at 10X magnification.4.6 Reports: The supplier of the product shall furnish with each shi
42、pment a report from the manufacturer 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, AMS 3352B, manufacturers identifi
43、cation, form, size, and quantity.4.7 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 results of testing three additional specimens for each original nonconforming specimen. Failure of any retest sp
44、ecimen 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 Packaging and Identification: 5.1.1 A lot of product may be packaged in small quantities and delivered under the basic lot approv
45、al provided lot identification is maintained.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMS 3352B SAE AMS 3352B- 8 -5.1.2 Each package shall be permanently and legibly marked with not less than
46、the following information:SILICONE RUBBER, FIBERGLASS FABRIC REINFORCEDAMS 3352BPURCHASE ORDER NUMBERMANUFACTURERS IDENTIFICATIONLOT NUMBERQUANTITYDATE OF SHIPMENT5.1.3 Packages of product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules a
47、nd regulations pertaining to the handling, packaging, and transportation of the product to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENT: Supplier shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders.7. REJECTIONS: P
48、roduct 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 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, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes
