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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 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 2007 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) Fa
4、x: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 35 - 45 RATIONALE This document has been reaffirmed to comply with the SAE 5-year Review policy. 1.SCOPE: 1.1Form: This specification covers a nitrile (NBR) rubber in
5、the form of sheet, strip, tubing, extrusions, and molded shapes. 1.2Application: These products have been used typically for parts, such as gaskets, diaphragms, bushings, grommets, and sleeves, requiring resistance to aromatic and aliphatic fuels when continuously or alternately exposed to both, but
6、 usage is not limited to such applications. 1.3Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in su
7、ch 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 personnel involved. AEROSPACE MATERIAL SPECIFICATION AMS 3214K IssuedDEC 1942 RevisedJAN
8、 1993 ReaffirmedJUN 2007 Superseding AMS 3214J Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 2 - 2. APPLICA
9、BLE 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. 2.1SAE Publications: Available from
10、 SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. AMS 2279Tolerances, Rubber Products MAM 2279Tolerances, Metric, Rubber Products AMS 2810Identification and Packaging, Elastomeric Products 2.2ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM
11、 D 297Rubber Products - Chemical Analysis ASTM D 395Rubber Property - Compression Set ASTM D 412Rubber Properties in Tension ASTM D 471Rubber Property - Effect of Liquids ASTM D 573Rubber - Deterioration in an Air Oven ASTM D 624Rubber Property - Tear Resistance ASTM D 2137Rubber Property - Brittlen
12、ess Point of Flexible Polymers and Coated Fabrics ASTM D 2240Rubber Property - Durometer Hardness 3.TECHNICAL REQUIREMENTS: 3.1Material: Shall be a compound, based on an acrylonitrile-butadiene (NBR) elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.2Properties: The p
13、roduct 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 practicable: Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001
14、Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 3 - TABLE 1 - Properties ParagraphPropertyRequirementTest Methods 3.2.1Hardness, Duromater “A” or equivalent40 5 ASTM D 2240 3.2.2Tensile Strength, minimum 1000 psi (
15、6.89 MPa) ASTM D 412, Die B or C 3.2.3Elongation, minimum400%ASTM D 412, Die B or C 3.2.4Tensile Stress at 100% Elongation, maximum 250 psi (1.72 MPa) ASTM D 412, Die B or C Stretch specimen twice to 125% elongation within 5 minutes before testing. 3.2.5Tear Resistance, minimum75 pounds force per in
16、ch (13.1 kN/m) ASTM D 624, Die B 3.2.6Specific GravityPreproduction Value 0.02 ASTM D 297 3.2.7Aliphatic Fuel Resistance: (After 24 hours drying at 70 C 1 (158 F 2) ASTM D 471 ASTM Ref. Fuel A 20 to 30 C (68 to 86 F) 3.2.7.1Volume Change, maximum-5%24 hours 0.5 3.2.8Aromatic Fuel Resistance: (Immedi
17、ate Deteriorated Properties) ASTM B 471 ASTM Ref. Fuel B 20 to 30 C (68 to 86 F) 3.2.8.1Hardness Change, Durometer “A” or equivalent-15 to 0 168 hours 0.5 3.2.8.2Tensile Strength Change, maximum-50% 3.2.8.3Elongation Change, maximum-50% 3.2.8.4Volume Change in 24 hours0 to +35% 3.2.8.5Volume Change
18、in 168 hours0 to +35% Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 4 - 3.2.12 Weathering: The product shal
19、l 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 a procedure agreed upon by pu
20、rchaser and vendor. Discoloration of metal shall not be considered objectionable. 3.3Quality: 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
21、product. 3.2.8.6Volume Change on Drying (after 168 hours immersion) at 70 C 1 (158 F 2) for 24 hours, maximum-20% 3.2.9Dry Heat ResistanceASTM D 573 100 C 1 3.2.9.1Hardness Change Durometer “A” or equivalent0 to +15 (212 F 2) 70 hours 0.5 3.2.9.2Tensile Strength Change, maximum-20% 3.2.9.3Elongation
22、 Change maximum-50% 3.2.9.4Bend (flat)No cracking or checking 3.2.10Compression Set:ASTM D 395, Method B 3.2.10.1Percent of Original Deflection, maximum60 100 C 1 (212 F 2) 70 hours 0.5 3.2.11Low-Temperature Resistance:ASTM D 2137, Method A 3.2.11.1BrittlenessPass-25 C 1 (-13 F 2) 10 minutes 1 TABLE
23、 1 - Properties ParagraphPropertyRequirementTest Methods Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 5 -
24、3.4Tolerances: Shall conform to all applicable requirements of AMS 2279 or MAM 2279. 4.QUALITY ASSURANCE PROVISIONS: 4.1Responsibility 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 t
25、he right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conform to the requirements of this specification. 4.2Classification of Tests: 4.2.1Acceptance Tests: Tests for requirements shown in Table 2 are acceptance tests and shall be performed on each lot
26、. 4.2.2Periodic Tests: Tests for requirements shown 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 2 - Acceptance Tests RequirementParagraph Hardness, as received 3.2.1 Tensile Strength, as recei
27、ved 3.2.2 Elongation, as received 3.2.3 Specific Gravity, as received 3.2.6 Compression Set 3.2.10 Tolerances 3.4 TABLE 3 - Periodic Tests RequirementParagraph Tensile Stress at 100% Elongation, as received 3.2.4 Tear Resistance, as received 3.2.5 Volume Change in Aliphatic Fuel 3.2.7.1 Volume Chang
28、e in Aromatic Fuel 3.2.8.4 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 6 - 4.2.3Preproduction Tests: Test
29、s 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 ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.2.3.1For
30、direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, contracting officer, or request for procurement. 4.3Sampling and Testing: Shall be as follows: 4.3.1For Accept
31、ance 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 specified in the applicable test procedure or, if not specified therein, not less than three. 4.3.1.1If specimens cannot be prepared from
32、 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 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
33、 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, 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 fr
34、om 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 compound, shall be supplied upon request. 4.3.1.2A lot shall be all product from the same batch of compound processed in one continuous run and presented for
35、 vendors inspection at one time. 4.3.1.3A batch shall be the quantity of compound run through a mill or mixer at one time. 4.3.1.4When 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 repo
36、rt of 4.5 shall state that such plan was used. 4.3.2For Periodic Tests and Preproduction Tests: As agreed upon by purchaser and vendor. 4.4Approval: 4.4.1Sample product shall be approved by purchaser before product for production use is supplied, unless such approval be waived by purchaser. Results
37、of tests on production product shall be essentially equivalent to those on the approved sample. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from
38、 IHS -,-,- AMS 3214KSAEAMS 3214K - 7 - 4.4.2Vendor shall use ingredients, manufacturing 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 equip
39、ment 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, sample product. Production product made by the revised procedure shall not be shipped prior to receipt of reapproval. 4.5R
40、eports: 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 performed, to the periodic test requirements, and stating that the product conforms to the other technical requirements. Thi
41、s report shall include the purchase order number, lot number, AMS 3214K, vendors compound number, form and size or part number, and quantity. 4.6Resampling 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
42、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 product represented. Results of all tests shall be reported. 5.PREPARATION FOR DELIVERY: 5.1Identification and
43、 Packaging: Shall be in accordance with AMS 2810. 5.1.1A lot of product may be packaged in small quantities and delivered under the basic lot approval provided lot identification is maintained. 6.ACKNOWLEDGMENT: A vendor shall mention this specification number and its revision letter in all quotatio
44、ns and when acknowledging 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 SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 1
45、2/04/2007 20:39:45 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3214KSAEAMS 3214K - 8 - 8.NOTES: 8.1The 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 t
46、o the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification. 8.2Dimensions and properties in inch/pound units and the Celsius temperatures are primary; dimensions and properties in SI units and the Fahrenheit temperat
47、ures are shown as the approximate equivalents of the primary units and are presented only for information. 8.3For direct U.S. Military procurement, purchase documents should specify not less than the following: Title, number, and date of this specification Form and size or part number of product des
48、ired Quantity of product desired Method of test and acceptance standards for weather resistance (See 3.2.7) and for corrosion (See 3.2.8) Level A packaging, if required (See AMS 2810). 8.4Similar 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. 8.5Products meeting the requirements of this specification have been classified under Federal Supply Classification (FSC) 5330. 8.6Ke