SAE-AMS-3352B-2000-R2007.pdf

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 therefrom, 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 International All rights reserved. No part of this publication 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) Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org Silicone Rubber, Fiberglass Fabric Reinforced RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. 1.SCOPE: 1.1Form: This specification covers a fiberglass reinforced silicone rubber in the form of sheet, strip, and molded parts. 1.2Application: 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 applications. Each application should be considered individually. 1.3Safety-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 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 SPECIFICATION AMS 3352B IssuedFEB 1995 RevisedMAY 2000 ReaffirmedJUN 2007 Superseding AMS 3352A Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 2 - 2.APPLICABLE DOCUMENTS: The issue of the following documents in 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 been specified, the last published issue of that document shall apply. 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. AMS 4943Titanium Alloy Hydraulic, Seamless, Tubing, 3.0A1 - 2.5V, Annealed AS1241Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft 2.2ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM D 395Rubber Property-Compression Set ASTM D 412Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers - Tension ASTM D 471Rubber Property-Effect of Liquids ASTM D 573Rubber-Deterioration in Air Oven ASTM D 624Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers ASTM D 2240Rubber Property-Durometer Hardness 3.TECHNICAL REQUIREMENTS: 3.1Material: Shall be a fiberglass fabric reinforced silicone rubber compound suitably cured to produce a product meeting 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. 3.2Properties: The product shall conform to requirements shown in Table 1, determined on parts or on sheet product representative of the parts, as applicable. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 3 - TABLE 1 - Properties PropertyRequirementTest Method 3.2.1Hardness, Durometer “A”55 to 70ASTM D 2240 3.2.2Tensile Strength, min600 psi (4.14 MPa) ASTM D 412, 3.2.3Elongation, min30%ASTM D 412 3.2.4Tear Strength, min250 pounds force/inch (43.8 kN/m) ASTM D 624, Die B 3.2.5Dry Heat Resistance:ASTM D 573 315 °C ± 3 (599 °F ± 5) 168 hours ± 0.5 3.2.5.1Hardness Change, Durometer “A” 0 to +25ASTM D 2240 3.2.5.2Tensile Strength, min600 psi (4.14 MPa) ASTM D 412 3.2.5.3Elongation, min25%ASTM D 412 3.2.5.4Tear Strength, min200 pounds force/inch (35.0 kN/m) ASTM D 624, Die B 3.2.5.5Weight Change, max-30%ASTM D 471 3.2.5.6Test specimen bent through an angle of 180 degrees around a mandrel with diameter equal to four times the thickness of the specimen (4T) Shall exhibit no cracks 3.2.6Hydraulic Fluid Resistance:ASTM D 471 AS1241, Type IV, CL 1, Grade A 24 °C ± 3 (75 °F ± 5) 24 hours ± 0.5 3.2.6.1Hardness Change, Durometer “A”-15 to 0ASTM D 2240 3.2.6.2Volume Change, max+15%ASTM D 471 3.2.6.3Test specimen bent through an angle of 180 degrees around a 4T diameter mandrel Shall exhibit no cracks Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 4 - 3.2.7Hydraulic Fluid Splash Resistance:ASTM D 471 AS1241, Type IV, CL 1, Grade A 24 °C ± 3 (75 °F ± 5) 5 minutes ± 1 3.2.7.1Test specimen bent through an angle of 180 degrees around a 4T diameter mandrel after 10 wetting/heating cycles Shall exhibit no cracks Test condition of 3.2.7 Plus Air 260 °C ± 3 (500 °F ± 5) 2 hours ± 0.1 3.2.8Compression Set:ASTM D 395, Method B 250 °C ± 3 (500 °F ± 5) 24 hours ± 0.5 3.2.8.1Percent of Original Thickness, max25 3.2.9Flammability: Dripping Flame time, max Burn length, max None 30 seconds 3.8 cm (1.5 inch) 4.5.1 3.2.10Lubricating Oil Splash ResistanceASTM D 471 AMS 3023 (ARM 200) 24 °C ± 3 (75 °F ± 5) 5 minutes ± 1 3.2.10.1 Hardness Change, Durometer “A”-6 to 0 3.2.10.2 Volume Change, max+20% 3.2.10.3 Test specimen bent through an angle of 180 degrees around a 4T diameter mandrel after 10 wetting/heating cycles Shall exhibit no cracks Test conditions of 3.2.10 Plus Air 150 °C ± 3 (302 °F ± 5) 2 hours ± 0.1 TABLE 1 - Properties (Continued) PropertyRequirementTest Method Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 5 - 3.6Quality: Product, as received by purchaser, shall be uniform in quality and condition, smooth, as free of foreign material as commercially practicable, and free of imperfections detrimental to usage of the product. 4.QUALITY ASSURANCE PROVISIONS: 4.1Responsibility 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 right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the specified requirements. 4.2Classification of Tests: 4.2.1Acceptance Tests: Hardness (3.2.1), tensile strength (3.2.2), elongation (3.2.3), and tear strength (3.2.4) are acceptance tests and shall be performed on each lot. 4.2.2Preproduction 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 purchaser deems confirmatory testing to be required. 3.2.11Fuel Splash ResistanceASTM D 471 ASTM Ref. Fuel B 24 °C ± 3 (75 °F ± 5) 5 minutes ± 1 3.2.11.1 Hardness Change, Durometer “A”-5 to 0 3.2.11.2 Volume Change, max-3% 3.2.11.3 Test specimen bent through an angle angle of 180 degrees around a 4T diameter mandrel after 10 wetting/heating cycles. Shall exhibit no cracks Test conditions of 3.2.11 Plus Air 39 °C ± 0.6 (100 °F ± 1) 2 hours ± 0.1 3.2.12Titanium Compatibility, Appearance No cracking or pitting4.5.2 TABLE 1 - Properties (Continued) PropertyRequirementTest Method Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 6 - 4.3Sampling and Testing: Shall be as follows: 4.3.1For 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. 4.3.1.1A lot shall be all product produced from the same batch of compound processed in one continuous run and presented for manufacturer's inspection at one time. 4.3.1.2A statistical sampling plan, acceptable to purchaser, may be used in lieu of sampling as in 4.3.1. 4.3.2For Preproduction Tests: Shall be acceptable to purchaser or as stated in the contract. 4.4Approval: 4.4.1Sample product shall be approved by purchaser before product for production use 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 parameters 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. 4.4.2Manufacturer of the product shall make no significant change in material, processes, or control factors from 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. 4.4.2.1Control factors for producing products include, but are not limited to, the following: 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) Curing time and pressure; variations of ±10% are permissible Finishing methods Methods of inspection. 4.4.2.2Any 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. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 7 - 4.5Test Methods: 4.5.1Flammability: Three test specimens shall be straightened until flat and 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 shall 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 cushion for 12 seconds and then removed. The flame time (seconds) and burn lengths (tenths of inch (mm) shall be measured, recorded, and averaged. 4.5.2Titanium 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 having 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 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. 4.6Reports: The supplier of the product shall furnish with each shipment 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, manufacturer's identification, form, size, and quantity. 4.7Resampling 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 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: 5.1Packaging and Identification: 5.1.1A lot of product may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 21:02:34 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3352BSAEAMS 3352B - 8 - 5.1.2Each package shall be permanently and legibly marked with not less than the following information: SILICONE RUBBER, FIBERGLASS FABRIC REINFORCED AMS 3352B PURCHASE ORDER NUMBER MANUFACTURER'S IDENTIFICATION LOT NUMBER QUANTITY DATE OF SHIPMENT 5.1.3Packages of product shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and 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 quot