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/AMS3334E AEROSPACE MATERIAL SPECIFICATION AMS3334E Issued 1955-03 Reaffirmed 2001-04 Revised 200
5、9-05 Superseding AMS3334D Silicone Rubber Extreme Low-Temperature Resistant 35 - 45 RATIONALE AMS3334E results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a silicone rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. 1
6、.2 Application Primarily for rubber-like parts required to operate or seal from -112 to +248 F (-80 to +120 C), compounded especially for operation at extreme low temperatures. Silicone rubber is resistant to deterioration by weathering and by high-aniline-point petroleum-base oils and remains flexi
7、ble over the temperature range noted. These products are not normally suitable for use in contact with low-aniline-point petroleum-base fluids, including fuels, due to excessive swelling. 1.3 Safety Hazardous Materials While the materials, methods, applications, and processes described or referenced
8、 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 precauti
9、onary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS 2.1 The purchase order date shall stipulate the published document that shall be in effect. The supplier may work to a subsequent revision unless a particular revision is specified. When the referenced
10、document has been cancelled and no superseding document has been specified, the last published revision shall apply 2.2 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.s
11、ae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products SAE AMS3334E Page 2 of 5 2.3 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
12、 Rubber Products Chemical Analysis ASTM D 395 Rubber Property Compression Set ASTM D 412 Rubber Properties in Tension ASTM D 471 Rubber Property Effect of Liquids ASTM D 518 Rubber Deterioration Surface Cracking ASTM D 573 Rubber Deterioration in an Air Oven ASTM D 624 Rubber Property Tear Resistanc
13、e ASTM D 797 Rubber Property Youngs Modulus at Normal and Subnormal Temperatures ASTM D 1149 Rubber Deterioration Surface Ozone Cracking in a Chamber (Flat Specimens) ASTM D 2137 Rubber Property Brittleness Point of Flexible Polymers and Coated Fabrics ASTM D 2240 Rubber Property Durometer Hardness
14、3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a compound, based on a silicone rubber, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Properties The product shall conform to the following requirements; tests shall be performed on the product supplied and in accordance with
15、 specified ASTM methods, insofar as practicable: TABLE 1 TEST REQUIREMENTS Paragraph Test Requirement Test Method 3.2.1 Original Properties 3.2.1.1 Hardness, Durometer “A” or equivalent 40 5 ASTM D 2240 3.2.1.2 Tensile Strength, minimum 500 psi (3.45 MPa) ASTM D 412, Die B or C 3.2.1.3 Elongation, m
16、inimum 250% ASTM D 412, Die B or C 3.2.1.4 Tear Resistance, minimum 50 pounds force per inch (8.75 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 Tem
17、perature: 212 F 2 3.2.2.1 Hardness Change, Durometer “A” or equivalent -10 to +5 (100 C 1) Time: 70 hours 0.5 3.2.2.2 Tensile Strength Change, maximum -30% 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
18、Resistance ASTM D 573 Temperature: 212 F 2 3.2.3.1 Hardness Change, Durometer “A” or equivalent 0 to +5 (100 C 1) Time: 22 hours 0.5 SAE AMS3334E Page 3 of 5 TABLE 1 TEST REQUIREMENTS (CONTINUED) Paragraph Test Requirement Test Method 3.2.3.2 Tensile Strength Change, maximum -10% 3.2.3.3 Elongation
19、Change, maximum -15% 3.2.3.4 Bend (flat) No cracking or checking 3.2.4 Compression Set ASTM D 395, Method B Temperature: 212 F 2 3.2.4.1 Percent of Original Deflection, maximum 30 (100 C 1) Time: 22 hours 0.5 3.2.5 Low-Temperature Resistance 3.2.4.2 Brittleness Pass ASTM D 2137, Method A Temperature
20、: -112 F 5 (-80 C 3) 3.2.5 Weathering The product shall show no evidence of cracking when tested in accordance with ASTM D 1149, Method B, Procedure B2 for seven days at 105 F 2 (40 C 1). The ozone pressure shall be 50+5 MPa. 3.3 Dimensions and Tolerances Dimensions and tolerances shall be as specif
21、ied in the parts standard, drawing or purchase document. If not specified, shall conform to all applicable requirements of AMS2279 . 3.4 Toxicological Formulations The material shall have no adverse effects on the health of personnel when used for its intended purpose in accordance with manufacturer
22、s instructions and with appropriate handling procedures. 3.5 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. 4. QUALITY ASSURA
23、NCE 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 testing deemed necessary to ensure that the
24、 product conforms to specified requirements . 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for requirements shown in Table 2 are acceptance tests and shall be performed on each lot: SAE AMS3334E Page 4 of 5 TABLE 2 ACCEPTANCE TESTS Requirement Paragraph Reference Hardness, as received 3.
25、2.1.1 Tensile Strength, as received 3.2.1.2 Elongation, as received 3.2.1.3 Specific Gravity 3.2.1.5 Compression Set 3.2.4 Brittleness 3.2.5.1 4.2.1.1 Lot: A quantity of one size of product processed as one production entity from a batch 4.2.1.2 Batch: The quantity of compound run through a mill or
26、mixer at one time. 4.2.1.3 Random Sampling The method shall be as 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 acceptance tests. The number of test iterations for each requirement shall be
27、specified in the applicable test procedure. 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 determinations for each requirement shall be as specified in the applicable test
28、 procedure or, if not specified therein, not less than three. 4.3.1.1 If test specimens cannot be prepared form the product, ASTM specimens prepared from the same batch and state of cure shall be used. When the product supplied is an extrusion of such shape that suitable test specimens cannot be cut
29、 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 0.008 (1.90 mm 0.20) in wall thickness, mechanically slit and flattened into a strip while b
30、eing extruded, and cured in the same manner as production material. When the product is a molded shape from which test specimens cannot be cut, a slab 6 x 6 inches (152 x 152 mm) by 0.075 inch 0.008 (1.90 mm 0.20) molded from the same batch of compound shall be supplied upon request. 4.3.1.2 When a
31、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 4.6.1 shall state that such plan was used. 4.3.2 For Preproduction Tests As agreed upon by purchaser and vendor. 4.4 Approval 4.4.1
32、 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 ingredients, manufacturing procedu
33、res, 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 shall submit for reapproval a state
34、ment 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. SAE AMS3334E Page 5 of 5 4.5 Reports The vendor of the product shall furnish with each shipment a r
35、eport 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, AMS3334E, vendors compound number, form or part number, and quan
36、tity. 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 retest specimen shall be c
37、ause 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 AMS2810. A lot may be packa
38、ged in small quantities and delivered under the basic lot approval provided lot information in maintained. 5.1.1 Each package, box, and shipping container shall be permanently and legibly marked with the following when pertinent: Specification number AMS number with revision, class, grade, and type
39、Manufacturers identification Manufacturers product designation Batch/lot number Date of manufacturing/packaging Shelf life expiration date Storage conditions 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase o
40、rders. 7. REJECTIONS Product 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
41、, 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, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. PREPARED BY AMS COMMITTEE “CE“
