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 therefr
2、om, 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 may
3、 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) F
4、ax: 724-776-0790 Email: CustomerService SAE WEB ADDRESS: http:/www.sae.orgAMS3214L AEROSPACEMATERIALSPECIFICATIONIssued 1942-12 Reaffirmed 1998-08 Revised 2008-06 Superseding AMS3214K Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 35 - 45 RATIONALEAMS3214L is a Five Year Review and upd
5、ate of this specification. 1. 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 These products have been used typically for parts, such as gaskets, diaphragms, bushings, grommets, and sleeves, requiring
6、 resistance to aromatic and aliphatic fuels when continuously or alternately exposed to both, 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 involve the use of
7、 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 health and safet
8、y 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 document issue is sp
9、ecified. 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 (inside USA and
10、Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products SAE AMS3214L - 2 -2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 6
11、10-832-9585, www.astm.org. ASTM D 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 S
12、trength of Conventional Vulcanized Rubber and Thermoplastic Elastomers 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 a compound, based on an acrylonitrile-butadie
13、ne (NBR) elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Properties The product shall conform to requirements shown in Table 1, 3.2.12, and 3.2.13; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicab
14、le: TABLE 1 - PROPERTIES Paragraph Property Requirement Test Methods 3.2.1 Hardness, Duromater “A” or equivalent 40 5 ASTM D 2240 3.2.2 Tensile Strength, minimum 1000 psi (6.89 MPa) ASTM D 412, Die B or C 3.2.3 Elongation, minimum 400% ASTM D 412, Die B or C 3.2.4 Tensile Stress at 100% Elongation,
15、maximum 250 psi (1.72 MPa) ASTM D 412, Die B or C Stretch specimen twice to 125% elongation within 5 minutes before testing.3.2.5 Tear Resistance, minimum 75 pounds force per inch (13.1 kN/m) ASTM D 624, Die B 3.2.6 Specific Gravity Preproduction Value 0.02 ASTM D 297 3.2.7 Aliphatic Fuel Resistance
16、 (After 24 hours drying at 158 F 2 (70 C 1) ASTM D 471 ASTM Ref. Fuel A 68 to 86 F (20 to 30 C) 3.2.7.1 Volume Change, maximum -5% 24 hours 0.5 3.2.8 Aromatic Fuel Resistance (Immediate Deteriorated Properties)ASTM B 471 ASTM Ref. Fuel B 68 to 86 F (20 to 30 C) 3.2.8.1 Hardness Change, Durometer “A”
17、 or equivalent -15 to 0 168 hours 0.5 3.2.8.2 Tensile Strength Change, maximum -50%SAE AMS3214L - 3 -TABLE 1 - PROPERTIES Paragraph Property Requirement Test Methods 3.2.8.3 Elongation Change, maximum -50% 3.2.8.4 Volume Change in 24 hours 0 to +35% 3.2.8.5 Volume Change in 168 hours 0 to +35% 3.2.8
18、.6 Volume Change on Drying (after 168 hours immersion) at 158 F 2 (70 C 1) for 24 hours, maximum -20%3.2.9 Dry Heat Resistance ASTM D 573 212 F 2 (100 C 1) 70 hours 0.5 3.2.9.1 Hardness Change Durometer “A” or equivalent 0 to +15 3.2.9.2 Tensile Strength Change, maximum -20%3.2.9.3 Elongation Change
19、 maximum -50%3.2.9.4 Bend (flat) No cracking or checking 3.2.10 Compression Set ASTM D 395, Method B 3.2.10.1 Percent of Original Deflection, maximum 60212 F 2 (100 C 1) 70 hours 0.5 3.2.11 Low-Temperature Resistance ASTM D 2137, Method A 3.2.11.1 Brittleness Pass -13 F 2 (-25 C 1) 10 minutes 1 3.2.
20、12 Weathering The product shall have weather resistance acceptable to purchaser, determined by a procedure agreed upon by purchaser and vendor. 3.2.13 Corrosion The product shall not have a corrosive effect on other materials when exposed to conditions normally encountered in service, determined by
21、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 uniform in quality and condition, smooth, as free from foreign materials as commercially practicable, and free from imperfections
22、detrimental to usage of the product. 3.4 Tolerances Shall conform to all applicable requirements of AMS2279. SAE AMS3214L - 4 -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 perfo
23、rmance of all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for requirements shown in Table 2 are acceptance tests
24、and shall be performed on each lot. TABLE 2 - ACCEPTANCE TESTS Requirement Paragraph Hardness, as received 3.2.1 Tensile Strength, as received 3.2.2 Elongation, as received 3.2.3 Specific Gravity, as received 3.2.6 Compression Set 3.2.10 Tolerances 3.4 4.2.2 Periodic Tests Tests for requirements sho
25、wn in Table 3 are periodic tests and shall be performed at a frequency selected by the vendor unless frequency of testing is specified by purchaser. TABLE 3 - PERIODIC TESTS Requirement Paragraph Tensile Stress at 100% Elongation, as received 3.2.4Tear Resistance, as received 3.2.5 Volume Change in
26、Aliphatic Fuel 3.2.7.1 Volume Change in Aromatic Fuel 3.2.8.4 4.2.3 Preproduction Tests 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 ingredients and/or processing requires reapproval as i
27、n 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 from each lot to perform all required tests. The number of determinations for each requirement shall be as speci
28、fied in the applicable test procedure or, if not specified therein, not less than three. SAE AMS3214L - 5 -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 supplied is an extrusion of such s
29、hape 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 inch 0.063 (25.40 mm 1.60) in OD by 0.075 inch 0.008 (1.90 mm 0.20) in wall thickness, mecha
30、nically 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 (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.020) thick molded from the same batch of compou
31、nd, shall be supplied upon request. 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. 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 statistic
32、al 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 Periodic Tests and Preproduction Tests As agreed upon by purchaser and vendor. 4.4 Approva
33、l 4.4.1 Sample 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
34、procedures, 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
35、a statement 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 r
36、esults of tests to determine conformance to the acceptance test requirements and, when performed, 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, AMS3214L, vendors compound
37、number, form and size or part number, and quantity. 4.6 Resampling 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. Fa
38、ilure of any retest specimen to meet the specified requirements shall be cause for rejection 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 AMS2810. 5.1.1 A lot of product may be packaged in
39、 small quantities and delivered under the basic lot approval provided lot identification is maintained. SAE AMS3214L - 6 -6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not con
40、forming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES 8.1 A change bar (|) 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 iss
41、ue of a document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revision. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Dimensions and properties in inch/pound
42、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 Purchase documents should specify not less than the following: AMS3214LForm
43、and size or part number of product desired Quantity of product desired Method of test and acceptance standards for weather resistance (See 3.2.7) and for corrosion (See 3.2.8). 8.4 Similar Specifications MIL-R-6855, Class 1, Grade 40, 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“
