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 2011 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: +1 724-776-4970 (outside U
4、SA) 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/AMS3303K AEROSPACE MATERIAL SPECIFICATION AMS3303 REV. K Issued 1948-11 Reaffirmed 2002-04 Re
5、vised 2011-06 Superseding AMS3303J Silicone, Rubber General Purpose 60 Durometer RATIONALE The requirements for low temperature modulus per ASTM D 797 were eliminated per committee agreement since this test specification is obsolete. 1. SCOPE 1.1 Form This specification covers a silicone rubber in t
6、he form of sheet, strip, tubing, extrusions, and molded shapes. 1.2 Application This product has been used typically for parts required to operate or seal from -85 to +401 F (-65 to +205 C). Silicone elastomer is resistant to deterioration by weathering and petroleum-base lubricating oil and remains
7、 flexible over the temperature range noted, but usage is not limited to such applications. 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. 1.3 Safety-Hazardous Material
8、s 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 wit
9、h 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 issue of the following documents in effect on the date of the purchase order forms a part of this specification to the
10、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. SAE AMS3303K Pag
11、e 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products 2.2
12、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 Property - Compression Set ASTM D 412 Rubber Properties in Tension ASTM D 471
13、 Rubber Property - Effect of Liquids ASTM D 573 Rubber - Deterioration in an Air Oven ASTM D 624 Rubber Property - Tear Resistance ASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics ASTM D 2240 Rubber Property - Durometer Hardness 3. TECHNICAL REQUIREMENTS 3.1 Ma
14、terial Shall be a compound, based on a silicone elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Properties This product shall conform to the following requirements; tests shall be performed on the product supplied and in accordance with specified ASTM methods, ins
15、ofar as practicable: SAE AMS3303K Page 3 of 6 TABLE 1 3.2.1 As Received 3.2.1.1 Hardness, Durometer “A” or equivalent 60 5 ASTM D 2240 3.2.1.2 Tensile Strength, minimum 650 psi (4.48 MPa) ASTM D 412, Die B or C 3.2.1.3 Elongation, minimum 150% ASTM D 412, Die B or C 3.2.1.4 Tear Resistance, minimum
16、35 pounds force per inch (6.13 kN/m) ASTM D 624, Die B 3.2.1.5 Specific Gravity Preproduction Value 0.03 ASTM D 297 3.2.2 Petroleum Lubricating Oil Resistance (Immediate Deteriorated Properties) ASTM D 471 Medium: ASTM Oil No. 1 Temperature: 302 F 5 (150 C 3) Time: 70 hours 0.5 3.2.2.1 Hardness Chan
17、ge, Durometer “A” or equivalent -15 to +5 3.2.2.2 Tensile Strength, Change, maximum -20% 3.2.2.3 Elongation Change, maximum -15% 3.2.2.4 Volume Change 0 to 15% 3.2.2.5 Decomposition None 3.2.2.6 Surface Tackiness None 3.2.3 Dry Heat Resistance ASTM D 573 Temperature: 437 F 5 (225 C 3) Time: 70 hours
18、 0.5 3.2.3.1 Hardness Change, Durometer “A” or equivalent 10 3.2.3.2 Tensile Strength Change, maximum -20% 3.2.3.3 Elongation Change, maximum -40% 3.2.3.4 Bend (flat) No cracking or checking 3.2.4 Compression Set ASTM D 395, Method B Temperature: 302 F 5 (150 C 3) Time: 70 hours 0.5 3.2.4.1 Percent
19、of Original Deflection, maximum 25 3.2.5 Low Temperature Resistance 3.2.5.1 Brittleness Pass ASTM D 2137, Method A Temperature: -85 F 5 (-65 C 3) Time: 3 minutes 0.3 SAE AMS3303K Page 4 of 6 3.2.6 Weathering When specified, the product shall have weather resistance acceptable to purchaser, determine
20、d by a procedure agreed upon by purchaser and supplier. 3.2.7 Corrosion The product shall not 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 cons
21、idered objectionable. 3.3 Quality The product, as received by purchaser, shall be uniform in quality and condition, smooth, as free from foreign material as commercially practicable, and free from imperfections detrimental to usage of the product. 3.4 Tolerances Shall conform to all applicable requi
22、rements of AMS2279. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of the product shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testin
23、g deemed necessary to ensure that the product conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for the following requirements are acceptance tests and shall be performed on each lot: TABLE 2 Requirement Paragraph Reference Hardness, as received 3.2.1.1 Ten
24、sile Strength, as received 3.2.1.2 Elongation, as received 3.2.1.3 Specific Gravity 3.2.1.5 4.2.2 Preproduction 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 ingredients and/
25、or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing Shall be as follows: SAE AMS3303K Page 5 of 6 4.3.1 For Acceptance Tests Sufficient product shall be taken at random from each lot to perform all required tests. The
26、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 specimens cannot be prepared from the product, ASTM test specimens prepared from the same batch and state of cure shall be used. When the
27、 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 (25.40 mm 1.60) in OD by 0.075 inch 0.
28、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 by 0.075 inch 0.008 (1.90 mm 0.20)
29、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 processed in one continuous production run and presented for vendors inspection at one time. 4.3.1.3 A batch shall be the quantity of compound run through a mill
30、or mixer at one time. 4.3.1.4 When 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. 4.3.2 For Preproduction Tests As agreed upon by purch
31、aser and vendor. 4.4 Approval 4.4.1 Sample 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 approved sample. 4.4.2 Vendor shall use
32、 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 manufacturing procedures, vendor
33、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. 4.5 Reports The vendor of the product shall furnish with each sh
34、ipment 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, AMS3303K, vendors compound number, form and size or pa
35、rt number, and quantity. 4.6 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 the results of testing three additional specimens for each original nonconforming specimen. Failure of any retest specime
36、n to meet the specified requirements shall be cause for rejection of the product represented and no additional testing shall be permitted. Results of all tests shall be reported. SAE AMS3303K Page 6 of 6 5. PREPARATION FOR DELIVERY 5.1 Identification and Packaging Shall be in accordance with AMS2810
37、. 6. ACKNOWLEDGMENT A vendor 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
38、 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 document. An (R) symbol to the left of the document title indicates a complete revision of the document, incl
39、uding technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and pr
40、operties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. 8.4 Purchase documents should specify not less than the following: AMS3303K Form and size or part number of product desired Quantity of product desi
41、red Acceptance standards and test methods for weather resistance (See 3.2.6) and corrosion (See 3.2.7). 8.5 Similar Specifications Federal ZZ-R-765, Class 2, 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”
