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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 therefr
2、om, 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
3、 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) Fa
4、x: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org Silicone Rubber General Purpose 50 Durometer RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. FOREWORD This Reaffirm contains format/editorial changes only. 1.SCOPE: 1.1Form: This specific
5、ation covers a silicone rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. 1.2Application: Primarily for parts required to operate or seal from -65 to +205 C (-85 to +401 F). Silicone elastomer is resistant to deterioration by weathering and petroleum-base lubricating oil and
6、 remains flexible over the temperature range noted. These products are not normally suitable for use in contact with gasoline or aromatic fuels and low-aniline-point petroleum-base fluids due to excessive swelling of the elastomer. AEROSPACE MATERIAL SPECIFICATION AMS 3302G IssuedNOV 1948 RevisedAPR
7、 1990 ReaffirmedJUN 2007 Superseding AMS 3302F Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 2 - 1.3Safety-
8、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 ens
9、ure familiarity with 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 following publications form a part of this specification to the extent specified herein. The latest
10、issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. 2.1.1Aerospace Material Specifications: AMS 2279Tolerances, Ru
11、bber Products MAM 2279 Tolerances, Metric, Rubber Products AMS 2810Identification and Packaging, Elastomeric Products 2.2ASTM Publications: Available from ASTM, 1916 Race Street, Philadelphia, PA 19103-1187. ASTM D 297Rubber Products - Chemical Analysis ASTM D 395Rubber Property - Compression Set AS
12、TM D 412Rubber Properties in Tension ASTM D 471Rubber Property - Effect of Liquids ASTM D 573Rubber - Deterioration in an Air Oven ASTM D 624Rubber Property - Tear Resistance ASTM D 797Rubber Property - Youngs Modulus at Normal and Subnormal Temperatures ASTM D 2137Rubber Property - Brittleness Poin
13、t of Flexible Polymers and Coated Fabrics ASTM D 2240Rubber Property - Durometer Hardness 3.TECHNICAL REQUIREMENTS: 3.1Material: Shall be a compound, based on a silicone rubber, suitably cured to produce a product meeting the requirements of 3.2. Copyright SAE International Provided by IHS under lic
14、ense with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 3 - 3.2Properties: The product shall conform to the following requirements; tests shall be performed on the produc
15、t supplied and in accordance with specified ASTM methods, insofar as practicable: TABLE 1 3.2.1As Received: 3.2.1.1Hardness, Durometer “A” or equivalent50 5 ASTM D 2240 3.2.1.2Tensile Strength, minimum700 psi (4.83 MPa) ASTM D 412, Die B or C 3.2.1.3Elongation, minimum200%ASTM D 412, Die B or C 3.2.
16、1.4Tensile Stress at 100% Elongation, maximum 450 psi (3.10 MPa) ASTM D 412, Die B or C Stretch specimen to 125% elongation within 5 minutes before testing 3.2.1.5Tear Resistance, minimum35 pounds force per inch (6.13 kN/m) ASTM D 624, Die B 3.2.1.6Specific GravityPreproduction Value 0.03 ASTM D 297
17、 3.2.2Petroleum Lubricating Oil Resistance: (Immediate Deteriorated Properties) ASTM D 471 Medium:ASTM Oil No. 1 Temperature:150 C 3 (302 F 5) 3.2.2.1Hardness Change, Durometer “A” or equivalent-15 to +5 Time:70 hours 0.5 3.2.2.2Tensile Strength, Change, maximum-25% 3.2.2.3Elongation Change, maximum
18、-20% 3.2.2.4Volume Change0 to +15% 3.2.2.5DecompositionNone 3.2.2.6Surface TackinessNone 3.2.3Dry Heat Resistance:ASTM D 573 Temperature:225 C 3 (437 F 5) Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTN
19、o reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 4 - 3.2.6Weathering: When specified, the product shall have weather resistance acceptable to purchaser, determined by a procedure agreed upon by purchaser and supplier. 3.2.7Corrosion: The product shall not
20、 have a corrosive effect on other materials when exposed to conditions normally encountered in service, determined by a procedure agreed upon by purchaser and vendor. Discoloration of metal shall not be considered objectionable. 3.3Quality: The product, as received by purchaser, shall be uniform in
21、quality and condition, smooth, as free from foreign material as commercially practicable, and free from imperfections detrimental to usage of the product. 3.4Tolerances: Shall conform to all applicable requirements of AMS 2279 or MAM 2279. 3.2.3.1Hardness Change, Durometer “A” or equivalent10 Time:7
22、0 hours 0.5 3.2.3.2Tensile Strength Change, maximum-20% 3.2.3.3Elongation Change, maximum-40% 3.2.3.4Bend (flat)No cracking or checking 3.2.4Compression Set:ASTM D 395, Method B Temperature:150 C 3 (302 F 5) 3.2.4.1Percent of Original Deflection, maximum25 Time:70 hours 0.5 3.2.5Low Temperature Resi
23、stance: 3.2.5.1BrittlenessPassASTM D 2137, Method A Temperature:-65 C 3 (-85 F 5) Time:3 minutes 0.3 3.2.5.2Youngs Modulus, maximum (See 8.2) 10,000 psi (68.9 MPa) ASTM D 797 Temperature:-50 C 3 (-58 F 5) Time:5 hours 0.2 TABLE 1 (Continued) Copyright SAE International Provided by IHS under license
24、with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 5 - 4.QUALITY ASSURANCE PROVISIONS: 4.1Responsibility for Inspection: The vendor of the product shall supply all sample
25、s for vendors tests and shall be responsible for performing 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 requirements of this specification. 4.2Classification of Tests: 4.2.1Acceptance T
26、ests: Tests for the following requirements are acceptance tests and shall be performed on each lot: 4.2.2Preproduction Tests: Tests for all technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of a product to a purchaser, when a change in ingredie
27、nts and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.2.2.1For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the pr
28、ocuring activity, contracting officer, or request for procurement. 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
29、 in the applicable test procedure or, if not specified therein, not less than three. TABLE 2 Requirement Paragraph Reference Hardness, as received3.2.1.1 Tensile Strength, as received3.2.1.2 Elongation, as received3.2.1.3 Specific Gravity3.2.1.6 Copyright SAE International Provided by IHS under lice
30、nse with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 6 - 4.3.1.1If specimens cannot be prepared from the product, ASTM test specimens prepared from the same batch and s
31、tate of cure shall be used. 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 from the same production lot shall be supplied upon request. This strip shall be prepared from tubing 1.000 inch 0.063 (2
32、5.40 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 production product. When the product is a molded shape from which test specimens cannot be cut, a slab 6 inches (152 mm) square
33、 by 0.075 inch 0.008 (1.90 mm 0.20) molded from the same batch of compound shall be supplied upon request. 4.3.1.2A lot shall be all product from the same batch of compound processed in one continuous production run and presented for vendors inspection at one time. 4.3.1.3A batch shall be the quanti
34、ty of compound run through a mill or mixer at one time. 4.3.1.4When a statistical sampling plan has been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the report of 4.5 shall state that such plan was used. 4.3.2For Preproducti
35、on Tests: As agreed upon by purchaser and vendor. 4.4Approval: 4.4.1Sample product shall be approved by purchaser before product for production use is supplied; unless such approval be waived by purchaser. Results of tests on production product shall be essentially equivalent to those on the approve
36、d sample. 4.4.2Vendor 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 product. If necessary to make any change in ingredients, in type of equipment for processing, or in ma
37、nufacturing procedures, vendor 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. 4.5Reports: The vendor of the pro
38、duct shall furnish with each shipment 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, AMS 3302G, vendors comp
39、ound number, form and size or part number, and quantity. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 7 -
40、4.6Resampling 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. Failure of any retest specimen to meet the specified r
41、equirements shall be cause for rejection of the product represented and no additional testing shall be permitted. Results of all tests shall be reported. 5.PREPARATION FOR DELIVERY: 5.1Identification and Packaging: Shall be in accordance with AMS 2810. 6.ACKNOWLEDGMENT: A vendor shall mention this s
42、pecification 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: 8.1A change bar ( | ) located in the left margin is fo
43、r 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
44、 and (R) are not used in original publications, nor in specifications that contain editorial changes only. 8.2The test for Youngs Modulus is not normally required but is intended to be used as a referee test in case of disagreement on the results of the brittleness test. 8.3Dimensions and properties
45、 in inch/pound units and the Celsius temperatures are primary; dimensions and properties in SI units and the Fahrenheit temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4For direct U.S. Military procurement, purchase documents shoul
46、d specify not less than the following: Title, number, and date of this specification Form and size or part number of product desired Quantity of product desired Acceptance standards and test methods for weather resistance (See 3.2.6) and corrosion (See 3.2.7) Level A packaging, if required (See AMS
47、2810). Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3302GSAEAMS 3302G - 8 - 8.5Similar Specifications: Federal ZZ-R-765, Class
48、 2, Grade 50, is listed for information only and shall not be construed as an acceptable alternate unless all requirements of this AMS are met. 8.6Products meeting the requirements of this specification have been classified under Federal Supply Classification (FSC) 9320. PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE” Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:46:10 MSTNo reproduction or networking permitted wit