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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside USA) 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/AMS3332F AEROSPACE MATERIAL SPECIFICATION AMS3332 REV. F Issued 1957-07 Reaffirme
5、d 2001-04 Revised 2015-07 Superseding AMS3332E Silicone Rubber Extreme Low-Temperature Resistant 15 - 30 RATIONALE This is the periodic review and reaffirmation with only minor editorial changes. 1. SCOPE 1.1 Form This specification covers an extreme low-temperature-resistant silicone rubber in the
6、form of sheet, strip, and molded shapes. 1.2 Application Primarily for rubber-like parts required to operate or seal from -112 to +446 F (-80 to +230 C), compounded especially for operation at extreme low temperatures. Silicone rubber is resistant to deterioration by weathering and by high-aniline-p
7、oint petroleum-base oils and remains flexible 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, applicati
8、ons, 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 hazardou
9、s 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 extent specified herein. The supplier
10、 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 INTERNATIONAL AMS3332F Page 2 of 6 2.1 SAE Public
11、ations Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS2817 Packaging and Identification, Preformed Packings AMS2279 Tolerances, Rubber Products 2.2 ASTM Publications Avai
12、lable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D297 Standard Test Methods for Rubber Products - Chemical Analysis ASTM D395 Standard Test Methods for Rubber Property - Compression Set ASTM D412 Standard Tes
13、t Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D471 Standard Test Method for Rubber Property - Effect of Liquids ASTM D573 Standard Test Method for Rubber - Deterioration in an Air Oven ASTM D624 Standard Test Method for Tear Strength of Conventional Rubber and Thermopla
14、stic Elastomers ASTM D1149 Standard Test Methods for Rubber Deterioration Surface Cracking in an Ozone Controlled Environment ASTM D2137 Standard Test Methods for Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics ASTM D2240 Standard Test Method for Rubber Property - Duromet
15、er Hardness 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. SAE INTERNATIONAL AMS3332F Page 3 of 6 3.2 Properties The product shall conform to the following requirements shown in Table 1; tes
16、ts shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable: Table 1 Physical properties Paragraph Test Requirement Test Method 3.2.1 Original Properties 3.2.1.1 Hardness, Durometer Type “A” scale 15 - 30 ASTM D2240 3.2.1.2 Tensile Strength, mi
17、nimum 400 psi (2.76 MPa) ASTM D412, Die B or C 3.2.1.3 Elongation, minimum 350% ASTM D412, Die B or C 3.2.1.4 Tear Resistance, minimum 30 pounds force per inch (5.25 kN/m) ASTM D624, Die B 3.2.1.5 Specific Gravity Preproduction Value 0.03 ASTM D297 3.2.2 Petroleum Lubricating Oil Resistance: (Immedi
18、ate Deteriorated Properties) ASTM D471 Medium: ASTM Oil No. 1 Temperature: 347 F 5 3.2.2.1 Hardness Change, Durometer, Type “A” scale -10 to +5 (175 C 3) Time: 70 hours 0.5 3.2.2.2 Tensile Strength Change, maximum -50% 3.2.2.3 Elongation Change, maximum -20% 3.2.2.4 Volume Change 0 to +25% 3.2.2.5 D
19、ecomposition None 3.2.2.6 Surface Tackiness None 3.2.3 Dry Heat Resistance ASTM D573 Temperature: 437 F 5 3.2.3.1 Hardness Change, Durometer Type “A” scale -5 to +10 (225 C 3) Time: 22 hours 0.5 3.2.3.2 Tensile Strength Change, maximum -15% 3.2.3.3 Elongation Change, maximum -20% 3.2.3.4 Bend (flat)
20、 No cracking or checking 3.2.4 Compression Set ASTM D395, Method B Temperature: 347 F 5 3.2.4.1 Percent of Original Deflection, maximum 60 (175 C 3) Time: 22 hours 0.5 3.2.5 Low-Temperature Resistance 3.2.5.1 Brittleness Pass ASTM D2137, Method A Temperature: -112 F 5 (-80 C 3) 3.2.6 Weathering The
21、product shall show no evidence of cracking when tested in accordance with ASTM D1149, Method B, Procedure B2 for 7 days at 105 F 2 (40 C 1). The ozone pressure shall be 50 mPa 5. 3.3 Dimensions and Tolerances Dimensions and tolerances shall be as specified in the parts standard, drawing, or purchase
22、 document, and shall conform to all applicable requirements of AMS2279. SAE INTERNATIONAL AMS3332F Page 4 of 6 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 manufacturers instructions and wit
23、h 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 ASSURANCE PROVISIONS 4.1 Res
24、ponsibility for Inspection The manufacturer of the product shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and perform any testing deemed necessary to ensure that the product conforms to the AMS requirements. 4.2 Classification of Tests 4.2.1 Ac
25、ceptance Tests Tests for the following requirements shown in Table 2 are acceptance tests and shall be performed on each lot. Table 2 Initial acceptance tests Requirement Paragraph Reference Hardness 3.2.1.1 Tensile Strength 3.2.1.2 Elongation 3.2.1.3 Specific Gravity 3.2.1.5 Volume Change 3.2.2.4 C
26、ompression Set 3.2.4 Brittleness 3.2.5.1 4.2.1.1 Random Sampling The method shall be as specified in the part standard, drawing or purchase document. If not specified, product shall be taken at random from each lot to perform all the required acceptance tests. 4.2.2 Preproduction Tests Tests for all
27、 technical requirements are preproduction tests and shall be performed prior to or on the initial shipment of the product to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Tes
28、ting 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 procedure or, if not specified therein, not less than three. SA
29、E INTERNATIONAL AMS3332F Page 5 of 6 4.3.1.1 If test specimens cannot be prepared from the product, ASTM test specimens prepared from the same batch and state of cure shall be used. When product is an extrusion of such shape that a suitable test specimen cannot be cut from the product, a separate fl
30、at 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 (25.40mm 1.60) in OD by .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 sa
31、me manner as the production lot. When the product is a molded shape from which test specimens cannot be cut, a slab of 6 x 6 inch (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 A lot shall be all product from the same
32、batch of compound processed in one continuous 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 or mixer at one time. Blending of previously compounded material is prohibited. 4.3.1.4 When a statistical sampling plan has been a
33、greed 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 supplier 4.4 Approval 4.4.1 Sample product shall be approved b
34、y 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 procedures, processes, and methods of insp
35、ection 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 statement of the proposed changes in ing
36、redients 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 shipment a report showing the results of tests to determine conformance
37、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, AMS3332F, vendors compound number, form and size or part number, and quantity. 4.6 Resampling and Retesting If any single sp
38、ecimen/test piece 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 cause for rejection. Results of al
39、l tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification and packaging 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 AMS2817. A lot may be packaged in small quantities and deli
40、vered under the basic lot approval provided lot identification is maintained. SAE INTERNATIONAL AMS3332F Page 6 of 6 5.1.1 Each package, box, and shipping container shall be permanently and legibly marked with the following when pertinent: Specification title AMS3332F, class, grade, and type Manufac
41、turers 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 orders.
42、 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, have
43、 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 Dimens
44、ions 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. 8.3 Similar Specifications Commercial Item Description A-A-59588, Class 3A, Grade 30, 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“
