1、SAE-AMS3237ADOPTION NOTICESAE-AMS3237, “BUTYL (IIR) RUBBER, PHOSPHATE ESTER RESISTANT34-45“, was adopted on 31-AUG-88 for use by the Department ofDefense (DoD). Proposed changes by DoD activities must besubmitted to the DoD Adopting Activity: Commander, Naval AirWarfare Center, Aircraft Division, Co
2、de 414100B120-3, Highway547, Lakehurst, NJ 08733-5100. Copies of this document may bepurchased from the Society of Automotive Engineers 400Commonwealth Drive Warrendale, Pennsylvania, United States,15096-0001. http:/www.sae.org/_Custodians: Adopting Activity:Navy - ASArmy - MRNavy - ASAir Force - 11
3、FSC 9320DISTRIBUTION STATEMENT A: Approved for public release; distributionis unlimited.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 entirelyvoluntary, and its applicability an
4、d 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 may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.
5、Copyright 2000 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0
6、001AEROSPACE MATERIAL SPECIFICATIONSubmitted for recognition as an American National StandardAMS 3237FIssued FEB 1953 Revised JAN 2000Superseding AMS 3237EButyl (IIR) RubberPhosphate Ester Resistant35 - 451 SCOPE:1.1 Form: This specification covers a butyl (IIR) rubber in the form of sheet, strip, e
7、xtrusions, and molded shapes.1.2 Application: These products have been used typically for parts, such as diaphragms, gaskets, grommets, and seals, requiring resistance to phosphate esters or low permeability to gases, but usage is not limited to such applications. This material is not normally suita
8、ble for use in contact with petroleum-base fluids due to excessive swell. Each application should be considered individually.1.3 Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous mate
9、rials, 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 health and safety of all person
10、nel involved.2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order form a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When th
11、e referenced document has been canceled and no superseding document has been specified, the last published issue of that document shall apply.AMS 3237F SAE AMS 3237F- 2 -2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 2279 Tolerances, Rubber ProductsMA
12、M 2279 Tolerances, Metric, Rubber ProductsAMS 2810 Identification and Packaging, Elastomeric Products2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM D 297 Rubber Products - Chemical AnalysisASTM D 395 Rubber Property - Compression SetASTM D 41
13、2 Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers - TensionASTM D 471 Rubber Property - Effect of LiquidsASTM D 518 Rubber Deterioration - Surface CrackingASTM D 573 Rubber - Deterioration in an Air OvenASTM D 624 Tear Strength of Conventional Vulcanized Rubber and Thermopla
14、stic Elastomers ASTM D 797 Rubber Property - Youngs Modulus at Normal and Subnormal TemperaturesASTM D 1149 Rubber Deterioration - Surface Ozone Cracking in a ChamberASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated FabricsASTM D 2240 Rubber Property - Durometer Hardnes
15、s3. TECHNICAL REQUIREMENTS: 3.1 Material: Shall be 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 requirements shown in Table 1, 3.2.6, and 3.2.7; tests shall be performed on the produ
16、ct supplied and in accordance with specified ASTM methods, insofar as practicable.AMS 3237F SAE AMS 3237F- 3 -TABLE 1 - PropertiesProperty Requirement Test Method3.2.1 As Received:3.2.1.1 Hardness, Durometer“A” or equivalent 40 5ASTM D 22403.2.1.2 Tensile Strength,minimum1100 psi(7.59 MPa)ASTM D 412
17、, Die B or C3.2.1.3 Elongation, minimum 550% ASTM D 412, Die B or C3.2.1.4 Tear Resistancepounds/inch (kg/m), minimum80% of Preproduction ValueASTM D 624, Die B3.2.1.5 Specific Gravity Preproduction Value 0.03ASTM D 2973.2.2 Phosphate Ester Resistance:(Immediate Deteriorated Properties)3.2.2.1 Hardn
18、ess ChangeDurometer “A” or equivalent 0 to -20ASTM D 471Medium: Tri-n-butylphosphateTemperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.2.2 Tensile Strength Change,maximum -40%3.2.2.3 Elongation Change, maximum -20%3.2.2.4 Volume Change 0 to +35%3.2.3 Dry Heat Resistance3.2.3.1 Hardness Change,Durome
19、ter “A” or equivalent 0 to +15ASTM D 573Temperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.3.2 Tensile Strength Change,maximum -25%AMS 3237F SAE AMS 3237F- 4 -3.2.6 Weathering: The product shall show no evidence of cracking when tested in accordance with ASTM D 1149 for seven days at 41 C 1 (106 F 2
20、). Test specimens shall be prepared and mounted in accordance with ASTM D 518, Method B.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. Discolo
21、ration of metal shall not be considered objectionable.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.3.4 Tolerances: Sha
22、ll conform to all applicable requirements of AMS 2279 or MAM 2279.3.2.3.3 Elongation Change,maximum -50%3.2.4 Compression Set:3.2.4.1 Percent of OriginalDeflection, maximum 85ASTM D 395, Method BTemperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.5 Low Temperature Resistance:3.2.5.1 Brittleness Pass
23、ASTM D 2137, Method ATemperature: -35 C 1(-31 F 2)Time: 10 minutes 0.53.2.5.2 Youngs Modulusmaximum (See 8.2)10 ksi(68.9 MPa)ASTM D 797Temperature: -40 C 1(-40 F 2)TABLE 1 - Properties (Continued)Property Requirement Test MethodAMS 3237F SAE AMS 3237F- 5 -4. QUALITY ASSURANCE PROVISIONS: 4.1 Respons
24、ibility for Inspection: The manufacturer of the product shall supply all samples 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 product conforms to the specified re
25、quirements.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Tests for the requirements shown in Table 2 are acceptance tests and shall be performed on each lot:4.2.2 Preproduction Tests: Tests for all technical requirements are preproduction tests and shall be performed prior to or on the initia
26、l 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 Testing: Shall be as follows:4.3.1 For Acceptance Tests: Sufficient product shall be taken at random
27、 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.4.3.1.1 If specimens cannot be prepared from the product, ASTM test specimens prepared from the sam
28、e 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 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
29、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 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 (1
30、52 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick molded from the same batch of compound shall be supplied upon request.TABLE 2 - Acceptance RequirementsRequirement Paragraph Hardness, as received 3.2.1.1Tensile Strength, as received 3.2.1.2Elongation, as received 3.2.1.3Volume Change in phosph
31、ate ester 3.2.2.4Compression Set 3.2.4AMS 3237F SAE AMS 3237F- 6 -4.3.1.2 A lot shall be all product from the same batches of compound processed in one continuous production run and presented for vendors inspection at one time. An inspection lot shall not exceed 1000 pounds (454 kg) and may be packa
32、ged in smaller quantities and delivered under the basic lot approval provided lot identification is maintained.4.3.1.3 A batch shall be the quantity of compound run through a mill or mixer at one time.4.3.1.4 When a statistical sampling plan has been agreed upon by purchaser and vendor, sampling sha
33、ll be in accordance with such plan in lieu of sampling as in 4.3 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 Sample product shall be approved by purchaser before product for production use is sup
34、plied, 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 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production product which are essenti
35、ally 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, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when req
36、uested, sample product. Production product made by the revised procedure shall not be shipped prior to receipt of reapproval.4.5 Reports: The supplier of the product shall furnish with each shipment a report from the manufacturer showing the results of tests to determine conformance to the acceptanc
37、e test requirements and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS 3237F, manufacturers compound number, form and size or part number, and quantity.4.6 Resampling and Retesting: If any specimen used in t
38、he 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 shall be cause for rejection of the produc
39、t represented. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY: 5.1 Identification and Packaging: Shall be in accordance with AMS 2810.AMS 3237F SAE AMS 3237F- 7 -6. ACKNOWLEDGMENT: A supplier shall mention this specification number and its revision letter in all quotations and wh
40、en 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 change bar ( l ) located in the left margin is for the convenience of the user in locating areas where technical revi
41、sions, not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specification
42、s that contain editorial changes only.8.2 The test for Youngs modulus is not normally required but is intended to be used as a referee test in case of disagreement on the results of the brittleness test.8.3 Dimensions and properties in inch/pound units and the Celsius temperatures are primary; dimen
43、sions and properties in SI units and the Fahrenheit temperatures are shown as the approximate equivalents of the primary units and are presented only for information.8.4 Procurement documents should specify not less than the following:AMS 3237FForm and size or part number of product desiredQuantity of product desiredAcceptance standards and test method for corrosion (See 3.2.7)Special packaging, if required (See AMS 2810).PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE”
