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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.
3、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 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS 3213LIssued DEC 1942Revised JAN 1991Reaffirmed OC
4、T 2001Superseding AMS 3213KAcrylonitrile Butadiene (NBR) RubberAromatic Fuel Resistant75 - 851. SCOPE:1.1 Form: This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes.1.2 Application: Primarily for parts, such as gaskets, diaphragms, bushi
5、ngs, grommets, and sleeves, requiring resistance to aromatic and aliphatic fuels when continuously or alternately exposed to both.1.3 Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous
6、 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 health and safety of all p
7、ersonnel involved.2. APPLICABLE DOCUMENTS: The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order.2.1 SAE
8、Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3213L SAE AMS 3213L- 2 -2.1.1 Aerospace Material Specifications:
9、AMS 2279 Tolerances, Rubber ProductsMAM 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 Rubb
10、er Property - Compression SetASTM D 412 Rubber Properties in TensionASTM D 471 Rubber Property - Effect of LiquidsASTM D 518 Rubber Deterioration - Surface CrackingASTM D 573 Rubber - Deterioration in an Air OvenASTM D 624 Rubber Property - Tear ResistanceASTM D 797 Rubber Property - Youngs Modulus
11、at Normal and Subnormal TemperaturesASTM D 1149 Rubber Deterioration - Surface Ozone Cracking in a Chamber (Flat Specimens)ASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated FabricsASTM D 2240 Rubber Property - Durometer Hardness3. TECHNICAL REQUIREMENTS: 3.1 Material: S
12、hall be a compound, based on an acrylonitrile-butadiene (NBR) 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
13、 methods, insofar as practicable:Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3213L SAE AMS 3213L- 3 -TABLE 1 - PropertiesParagraph Test Requirement Test Method3.2.1 As Received3.2.1.1 Hardness,
14、 Durometer “A“or equivalent 80 5ASTM D 22403.2.1.2 Tensile Strength,minimum1500 psi(10.3 MPa)ASTM D 412, Die B or C3.2.1.3 Elongation, minimum 150% ASTM D 412, Die B or C3.2.1.4 Tensile Stress at 100%Elongation, maximum1000 psi(6.89 MPa)ASTM D 412, Die B or CStretch specimen twiceto 125% elongation
15、within5 minutes before testing.3.2.1.5 Tear Resistance,minimum80% of Prepro-duction ValueASTM D 624, Die B3.2.1.6 Specific Gravity PreproductionValue 0.02ASTM D 2973.2.2 Aliphatic Fuel Resistance:(After 24 hours drying at70 C 1 (158 F 2)ASTM D 471Medium: ASTM Ref. Fuel ATemperature: 20 - 30C(68 - 86
16、F)Time: 24 hours 0.53.2.2.1 Volume Change, maximum -5%3.2.3 Aromatic Fuel Resistance:(Immediate DeterioratedProperties)3.2.3.1 Hardness Change,Durometer “A“ orequivalent -20 to 0ASTM D 471Medium: ASTM Ref. Fuel BTemperature: 20 - 30 C(68 - 86 F)Time: 166 hours 0.53.2.3.2 Tensile Strength, Change,max
17、imum3.2.3.2.1 For parts other thanextrusions -40%3.2.3.2.2 For extruded parts -45%3.2.3.3 Elongation Change,maximum -45%Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3213L SAE AMS 3213L- 4 -Parag
18、raph Test Requirement Test Method3.2.3.4 Volume Change in24 hours 0 to + 35%3.2.3.5 Volume Change in168 hours 0 to + 35%3.2.3.6 Volume Change on Drying(after 168 hoursimmersion) at 70 C 1(158 F 2) for 24 hours,maximum3.2.3.6.1 Parts with crosssection or thickness0.110 inch (2.79 mm)and under -8%3.2.
19、3.6.2 Parts with crosssection or thickness0.110 inch (2.79 mm) -5%3.2.4 Dry Heat Resistance:3.2.4.1 Hardness Change, Durometer“A“ or equivalent 0 to +10ASTM D 573Temperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.4.2 Tensile Strength Change,maximum -20%3.2.4.3 Elongation Change,maximum -40%3.2.5 Com
20、pression Set:3.2.5.1 Percent of OriginalDeflection, maximumASTM D 395, Method BTemperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.5.1.1 For parts other thanextrusions 503.2.5.1.2 For extruded parts 603.2.6 Low-Temperature Resistance:3.2.6.1 Brittleness PassASTM D 2137, Method ATemperature: -18 C 1(0
21、 F 2)Time: 10 minutes 13.2.6.2 Youngs Modulus, maximum(See 8.2)50,000 psi(345 MPa)ASTM D 797Temperature: -25 C 1(-13 F 2)Time: 5 hours 0.5TABLE 1 - Properties (Continued)Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without li
22、cense from IHS-,-AMS 3213L SAE AMS 3213L- 5 -3.2.7 Weathering: The product shall show no evidence of cracking when tested in accordance with ASTM D 1149 for 7 days at 40 C 1 (104 F 2). Test specimens shall be prepared and mounted in accordance with ASTM D 518, Method B.3.2.8 Corrosion: The product s
23、hall 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 objectionable.3.3 Quality: The product, as received by purchaser, shall be uni
24、form 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: Shall conform to all applicable requirements of AMS 2279 or MAM 2279.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility
25、for Inspection: The vendor of the product shall supply all samples for vendors tests and shall be responsible for performing 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 requirements of
26、this specification.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:4.2.2 Periodic Tests: Tests for the following requirements are periodic tests and shall be performed at a frequency selected by the ven
27、dor unless frequency of testing is specified by purchaser:TABLE 2Requirement ParagraphHardness, as received 3.2.1.1Tensile Strength, as received 3.2.1.2Elongation, as received 3.2.1.3Specific Gravity 3.2.1.6Compression Set 3.2.5Copyright SAE International Provided by IHS under license with SAENot fo
28、r ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3213L SAE AMS 3213L- 6 -4.2.3 Preproduction Tests: Tests for all 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 in
29、gredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required.4.2.3.1 For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by
30、the procuring activity, contracting officer, or request for procurement.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 spe
31、cified 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 same batch and state of cure shall be used. When the product is an extrusion of such shape that suitable test spec
32、imens 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 inch 0.063 (25.40mm 1.60) in OD by 0.075 inch 0.008 (1.90 mm 0.20) in wall thickness, mechanically slit and flattened in
33、to 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 (152 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 re
34、quest.4.3.1.2 A lot shall be all product from the same batch of compound processed in one continuous run and presented for vendors inspection at one 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 provi
35、ded 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 shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the
36、 report of 4.5 shall state that such plan was used.TABLE 3Requirement ParagraphTensile Stress at 100% Elongation,as received 3.2.1.4Tear Resistance 3.2.1.5Volume Change in Aliphatic Fuel 3.2.2.1Volume Change in Aromatic Fuel 3.2.3.4Copyright SAE International Provided by IHS under license with SAENo
37、t for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3213L SAE AMS 3213L- 7 -4.3.2 For Periodic Tests and 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 s
38、upplied, 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 inspection on production product which are essentially
39、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 ingredients and/or processing, and, when requested, sa
40、mple 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 to the acceptance test requirements and, when perf
41、ormed, to the periodic test requirements, and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS 3213L, vendors compound number, form and size or part number, and quantity.4.6 Resampling and Retesting: If any sp
42、ecimen 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 shall be cause for rejecti
43、on of the product represented. Results of all tests shall be reported.5. PREPARATION FOR DELIVERY: 5.1 Identification and Packaging: Shall be in accordance with AMS 2810.6. ACKNOWLEDGMENT: A vendor shall mention this specification number and its revision letter in all quotations and when acknowledgi
44、ng purchase orders.7. REJECTIONS: Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,
45、-AMS 3213L SAE AMS 3213L- 8 -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 been made to the previous issue of this specification. An (R) symbol to the left of the document title
46、indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications 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 tes
47、t 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; dimensions and properties in SI units and the Fahrenheit temperatures are shown as the approximate equivalents of the primary units and are pre
48、sented only for information.8.4 For direct U.S. Military procurement, purchase documents should specify not less than the following:Title, number, and date of this specificationForm and size or part number of product desiredQuantity of product desiredMethod of test and acceptance standards for corro
49、sion (See 3.2.8)Level A packaging, if required (See AMS 2810).8.5 Products meeting the requirements of this specification have been classified under Federal Supply Classification (FSC) 9320.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or n
