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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 theref
2、rom, 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 2008 SAE International All rights reserved. No part of this publication ma
3、y 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 AMS 3252J AEROSPACE MATERIAL SPECIFICATION Issued 1944-11 Noncurrent 1995-08 Revised 2008-01 Superseding AMS 3252H Synthetic Rubber and Cork Composition General Purpose Firm RATIONALE This standard has been revised to
5、 clarify the Sections and remove references to military requirements. 1. SCOPE 1.1 Form This specification covers a synthetic rubber and cork composition in the form of sheet, strip, and molded shapes. 1.2 Application This product has been used typically for parts, such as packings, seals, grommets,
6、 line support blocks, and tank strap pads, where cushioning and vibration damping are of prime importance, but usage is not limited to such applications. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may invol
7、ve 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 hea
8、lth 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 may work to a subsequent revision of a document unless a specific documen
9、t 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. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (in
10、side USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2810 Identification and Packaging, Elastomeric Products Copyright SAE International Provided by IHS under license with SAELicensee=MHI - NAGOYA related to 3944000/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or
11、 networking permitted without license from IHS -,-,- SAE AMS 3252J - 2 - 2.2 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
12、Property - Compression Set ASTM D 412 Rubber Properties in Tension ASTM D 471 Rubber Property - Effect of Liquids ASTM D 573 Rubber - Deterioration in An Air Oven ASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics ASTM F 36 Compressibility and Recovery of Gasket
13、Materials ASTM F 104 Classification System for Nonmetallic Gasket Materials 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a granulated cork uniformly dispersed in a synthetic rubber compound, suitably cured to produce a product meeting the requirements of 3.2. Joints shall be vulcanized and the jo
14、int section shall have essentially the same strength and size as the solid section. 3.2 Properties The product shall conform to the following requirements shown in Table 1; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable: TABLE 1
15、 - PROPERTIES Paragraph Test Requirement Test Method 3.2.1 As Received 3.2.1.1 Compressibility 35% 5 ASTM F 36 3.2.1.2 Elongation, minimum 75% ASTM D 412, Die B or C 3.2.1.3 Density 0.91 to 1.10 g/cm3 ASTM D 297 3.2.2 Aliphatic Fuel Resistance (Immediate Deteriorated Properties) ASTM D 471 Medium: A
16、STM Ref. Fuel A 3.2.2.1 Compressibility Change (See 8.2) -10 to +20% Temperature: 68 to 86 F (20 to 30 C) Time: 22 hours 0.5 3.2.2.2 Volume Change -5 to +25% 3.2.2.3 Weight Change 3.2.2.3.1 Upon removal from fuel 0 to +25% 3.2.2.3.2 After 22 hours 0.5 air drying at 20 to 30 C (68 to 86 F), maximum (
17、based on unimmersed weight) -8% Copyright SAE International Provided by IHS under license with SAELicensee=MHI - NAGOYA related to 3944000/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AMS 3252J - 3 - TABLE 1 - PROPERTIES
18、 (CONT.) Paragraph Test Requirement Test Method 3.2.3 Petroleum Lubricating Oil Resistance (Immediate Deteriorated Properties) ASTM D 471 Medium: ASTM Oil No. 1 3.2.3.1 Compressibility Change (See 8.2) -5% to +15% Temperature: 212 F 5 (100 C 3) Time: 22 hours 0.5 3.2.3.2 Volume Change -10 to +10% 3.
19、2.3.3 Decomposition None 3.2.3.4 Surface Tackiness None 3.2.4 Water Absorption (Immediate Deteriorated Properties) ASTM D 471 Medium: Distilled Water 3.2.4.1 Compressibility Change (See 8.2) 0 to +15% Temperature: 212 F 5 (100 C 3) Time: 1 hour 0.2 3.2.4.2 Volume Change 0 to +10% 3.2.4.3 Weight Chan
20、ge 0 to +15% 3.2.5 Dry Heat Resistance ASTM D 573 Temperature: 212 F 5 (100 C 3) Time: 70 hours 0.5 3.2.5.1 Compressibility Change (See 8.2) -15% to +5% 3.2.5.2 Flexibility Pass ASTM F 104 3.2.6 Compression Set ASTM D 395, Method B Temperature: 158 F 5 (70 C 3) Time: 22 hours 0.5 3.2.6.1 Percent of
21、Original Deflection, maximum 80 3.2.7 Low-Temperature Brittleness Pass ASTM D 2137, Method B Temperature: 31 F 4 (-35 C 2) Specimen to be 0.060 to 0.125 inch (1.52 to 3.18 mm) thick 3.2.8 Weathering When specified, the product shall have weather resistance acceptable to purchaser, determined by a pr
22、ocedure agreed upon by purchaser and vendor. 3.2.9 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 considered obje
23、ctionable. Copyright SAE International Provided by IHS under license with SAELicensee=MHI - NAGOYA related to 3944000/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AMS 3252J - 4 - 3.3 Quality The product, as received by p
24、urchaser, 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 be as follows: 3.4.1 Sheet and Strip Shall be as shown in Table 2. TABLE 2A - SHEET AND STRIP
25、TOLERANCE, INCH/POUND UNITS Nominal Thickness Inches Tolerance, Inch plus and minus Up to 0.125, incl 0.016 Over 0.125 to 0.500, incl 0.031 Over 0.500 0.047 TABLE 2B - SHEET AND STRIP TOLERANCE, SI UNITS Nominal Thickness Millimeters Tolerance, Millimeters plus and minus Up to 3.18, incl 0.41 Over 3
26、.18 to 12.70, incl 0.79 Over 12.70 1.19 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
27、 confirmatory testing 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 as shown in Table 3: TABLE 3 - ACCEPTANCE TEST REQUIRE
28、MENTS Requirement Paragraph Compressibility, as received 3.2.1.1 Elongation, as received 3.2.1.2 Density, as received 3.2.1.3 Volume Change in Oil 3.2.3.2 Compression Set 3.2.6 4.2.2 Preproduction Tests Tests for all technical requirements are preproduction tests and shall be performed prior to or o
29、n the initial shipment of a 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. Copyright SAE International Provided by IHS under license with SAELicensee=MHI - NAGOYA related to 3944000
30、/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AMS 3252J - 5 - 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 tes
31、ts. 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. 4.3.1.1 A lot shall be all product from the same batch of compound processed in one continuous run and presented for vendors inspection at o
32、ne time. An inspection lot shall not exceed 500 pounds (227 kg) and may be packaged in smaller quantities and delivered under the basic lot approval provided lot identification is maintained. 4.3.1.2 A batch shall be the quantity of compound run through a mill or mixer at one time. 4.3.1.3 When a st
33、atistical 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 purchaser and vendor. 4.4 Approval 4.4.1 Sam
34、ple 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 procedures,
35、 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 statement
36、 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 shipment a report showing the results of
37、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 3252J, vendors compound number, form and size or part number, and quantity. 4.6 Resamplin
38、g 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 requirements s
39、hall 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 5.1 Identification and Packaging Shall be in accordance with AMS 2810. Copyright SAE International Provided by IHS under license wi
40、th SAELicensee=MHI - NAGOYA related to 3944000/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AMS 3252J - 6 - 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and
41、 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 Marginal Indicia A change bar (|) located in the left margin is for the convenience of the user in locating areas w
42、here technical revisions, not editorial changes, have been made to the previous issue of a specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revision. Change bars and (R) are not used in original publications, nor i
43、n specifications that contain editorial changes only. 8.2 Compressibility Change Shall be the arithmetic difference between the as-received and conditioned compressibilities, both expressed in percentage. 8.3 Terms used in AMS are clarified in ARP1917. 8.4 Dimensions and properties in inch/pound uni
44、ts 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. 8.5 Purchase documents should specify not less than the following: AMS 3252J Form a
45、nd size or part number of product desired Quantity of product desired Test methods and acceptance standards for weather resistance (3.2.8) and corrosion (3.2.9). PREPARED BY AMS COMMITTEE “CE“ Copyright SAE International Provided by IHS under license with SAELicensee=MHI - NAGOYA related to 3944000/3944000013 Not for Resale, 02/16/2008 00:42:53 MSTNo reproduction or networking permitted without license from IHS -,-,-