SAE AMS 3238H-2014 Butyl (IIR) Rubber Phosphate Ester Resistant 65 - 75.pdf
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1、AEROSPACE MATERIAL SPECIFICATION AMS3238 REV. H Issued 1953-02 Reaffirmed 2001-04 Revised 2014-11 Superseding AMS3238H Butyl (IIR) Rubber Phosphate Ester Resistant 65 75 RATIONALE Forcible redirection to AMS7338 for O-rings and other compression seals deleted from AMS3238H since no other AMS3XXX spe
2、cification has such a forcible redirection. 1. SCOPE 1.1 Form This specification covers a butyl (IIR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. 1.2 Application This product has been used typically for parts such as grommets requiring resistance to phosphate esters or
3、 low permeability to gases, but usage is not limited to such applications. Not suitable for use in contact with petroleum-base fluids due to excessive swell. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may i
4、nvolve 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
5、 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 may work to a subsequent revision of a document unless a specific doc
6、ument 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 Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and
7、engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it
8、 may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechani
9、cal, 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 USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. T
10、o provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3238H SAE INTERNATIONAL AMS3238H Page 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 724-7
11、76-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products 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
12、297 Rubber Products - Chemical Analysis ASTM D 395 Rubber Property - Compression Set ASTM D 412 Vulcanized Rubber and Thermoplastic Elastomers -Tension ASTM D 471 Rubber Property - Effect of Liquids ASTM D 573 Rubber - Deterioration in an Air Oven ASTM D 624 Tear Strength of Conventional Vulcanized
13、Rubber and Thermoplastic Elastomers ASTM D 1149 Rubber Deterioration - Cracking in an Ozone Controlled Environment 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 Material Shall be
14、a compound, based on a butyl (IIR) elastomer, 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 specified ASTM methods, insofar as practi
15、cable: SAE INTERNATIONAL AMS3238H Page 3 of 6 TABLE 1 - PROPERTIES Paragraph Property Requirement Methods 3.2.1 As Received 3.2.1.1 Hardness, Durometer “A” or equivalent 70 5 ASTM D 2240 3.2.1.2 Tensile Strength, minimum 1500 psi (10.3 MPa) ASTM D 412, Die B or C 3.2.1.3 Elongation, minimum 300% AST
16、M D 412, Die B or C 3.2.1.4 Tear Resistance pounds force per inch (N/m), minimum 80% of Preproduction Value ASTM D 624, Die B or C 3.2.1.5 Specific Gravity Preproduction Value 0.03 ASTM D 297 3.2.2 Phosphate Ester Resistance (Immediate Deteriorated Properties) ASTM D 471 Medium: Tri-n-butyl phosphat
17、e 3.2.2.1 Hardness Change, Durometer “A” or equivalent 0 to -30 Temperature: 212 F 2 (100 C 1) Time: 70 hours 0.5 3.2.2.2 Tensile Strength Change, maximum -30% 3.2.2.3 Elongation Change, maximum -20% 3.2.2.4 Volume Change 0 to +30% 3.2.3 Dry Heat Resistance ASTM D 573 Temperature: 212 F 2 (100 C 1)
18、Time: 70 hours 0.5 3.2.3.1 Hardness Change, Durometer “A” or equivalent 0 to +10 3.2.3.2 Tensile Strength Change, maximum -20% 3.2.3.3 Elongation Change, maximum -40% 3.2.4 Compression Set ASTM D 395, Method B Temperature: 212 F 2 (100 C 1) Time: 70 hours 0.5 3.2.4.1 Percent of Original Deflection,
19、maximum 85 3.2.5 Low-Temperature Resistance 3.2.5.1 Brittleness Pass ASTM D 2137, Method A Temperature: -31 F 2 (-35 C 1) Time: 10 minutes 0.5 3.2.6 Weathering The product shall show no evidence of cracking when tested in accordance with ASTM D 1149 for seven days at 104 F 2 (40 C 1). Test specimens
20、 shall be prepared and mounted in accordance with ASTM D 1149, Method B2. 3.3 Quality The product, as received by purchaser, shall be uniform in quality and condition, smooth, as free from foreign materials as commercially practicable, and free from imperfections detrimental to usage of the product.
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