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 there
2、from, 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 2012 SAE International All rights reserved. No part of this publication m
3、ay 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: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3215M AEROSPACE AEROSPACE MATERIAL SPECIFICATION AMS3215 REV. M Issued 1942-12 Reaffirmed
5、2003-11 Revised 2012-12 Superseding AMS3215L Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 65 - 75 RATIONALE Specification was updated for the five year review. 1. SCOPE 1.1 Form This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and mold
6、ed shapes. 1.2 Application Primarily for parts, such as gaskets, diaphragms, bushings, 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 proces
7、ses 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 such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and
8、 to take necessary precautionary measures to ensure the 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
9、subsequent revision of a document unless a specific document 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 AMS3215M Page 2 of 7 2.1 SAE Publications Available from SAE Int
10、ernational, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products MAM2279 Tolerances, Metric, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products 2.2 ASTM Pub
11、lications 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 297 Rubber Products - Chemical Analysis ASTM D 395 Rubber Property - Compression Set ASTM D 412 Rubber Properties in Tension ASTM D 471 Rubber P
12、roperty - Effect of Liquids ASTM D 573 Rubber - Deterioration in an Air Oven ASTM D 624 Rubber Property - Tear Resistance ASTM D 1149 Rubber Deterioration - Surface Ozone Cracking in a Chamber (Flat Specimens) ASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics AS
13、TM D 2240 Rubber Property - Durometer Hardness 3. TECHNICAL REQUIREMENTS 3.1 Material Shall 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;
14、 tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable: SAE AMS3215M Page 3 of 7 3.2.1 As Received: 3.2.1.1 Hardness, Durometer ASTM D 2240 “A“ or equivalent 70 5 3.2.1.2 Tensile Strength, 1500 psi ASTM D 412, Die B or C minimum (10.3
15、MPa) 3.2.1.3 Elongation, minimum 250% ASTM D 412, Die B or C 3.2.1.4 Tensile Stress at 1000 psi ASTM D 412, Die B or C 100% Elongation, (6.89 MPa) Stretch specimen twice to 125% maximum elongation within 5 minutes before testing. 3.2.1.5 Tear Resistance, 80% of ASTM D 624, Die B minimum Preproductio
16、n Value 3.2.1.6 Specific Gravity Preproduction ASTM D 297 Value 0.02 3.2.2 Aliphatic Fuel Resistance: ASTM D 471 (After 24 hours drying at Medium: ASTM Ref. Fuel A 158 F 2 (70 C 1) Temperature: 68 to 86 F (20 to 30 C) Time: 24 hours 0.5 3.2.2.1 Volume Change, maximum -5% 3.2.3 Aromatic Fuel Resistan
17、ce: ASTM D 471 (Immediate Deteriorated Medium: ASTM Ref. Fuel B Properties) Temperature: 68 to 86 F (20 to 30 C) 3.2.3.1 Hardness Change, Time: 168 hours 0.5 Durometer “A“ or equivalent -20 to 0 3.2.3.2 Tensile Strength Change, maximum 3.2.3.2.1 For parts other than extrusions -50% 3.2.3.2.2 For ext
18、ruded parts -60% 3.2.3.3 Elongation Change, maximum -45% 3.2.3.4 Volume Change in 24 hours 0 to +35% 3.2.3.5 Volume Change in 168 hours 0 to +35% SAE AMS3215M Page 4 of 7 3.2.3.6 Volume Change on Drying (after 168 hours immersion) at 158 F 2 (70 C 1) for 24 hours, maximum -10% 3.2.4 Dry Heat Resista
19、nce: ASTM D 573 Temperature: 212 F 2 3.2.4.1 Hardness Change, (100 C 1) Durometer “A“ or Time: 70 hours 0.5 equivalent 0 to +10 3.2.4.2 Tensile Strength Change, maximum -20% 3.2.4.3 Elongation Change, maximum -40% 3.2.5 Compression Set: ASTM D 395, Method B Temperature: 212 F 2 3.2.5.1 Percent of Or
20、iginal (100 C 1) Deflection, maximum Time: 70 hours 0.5 3.2.5.1.1 For parts other than extrusions 75 3.2.5.1.2 For extruded parts 80 3.2.6 Low-Temperature Resistance: ASTM D 2137, Method A Temperature: 0 F 2 3.2.6.1 Brittleness Pass (-18 C 1) Time: 10 minutes 1 3.2.7 Weathering The product shall sho
21、w no evidence of cracking when tested in accordance with ASTM D 1149 for 7 days at 104 F 2 (40 C 1). 3.2.8 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 ven
22、dor. 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 detrimental to usage of the product. SAE AM
23、S3215M Page 5 of 7 3.4 Tolerances Shall conform with all applicable requirements of AMS2279 or MAM2279. 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 performing all required tests. P
24、urchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the requirements of this specification. 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for the following requirements are acceptance tests and shall be perf
25、ormed on each lot: TABLE 1 Requirement Paragraph Hardness, as received 3.2.1.1 Tensile Strength, as received 3.2.1.2 Elongation, as received 3.2.1.3 Specific Gravity 3.2.1.6 Compression Set 3.2.5 4.2.2 Periodic Tests Tests for the following requirements are periodic tests and shall be performed at a
26、 frequency selected by the vendor unless frequency of testing is specified by purchaser: TABLE 2 Requirement Paragraph Tensile Stress at 100% Elongation, as received 3.2.1.4 Tear Resistance 3.2.1.5 Volume Change in Aliphatic Fuel 3.2.2.1 Volume Change in Aromatic Fuel 3.2.3.4 4.2.3 Preproduction Tes
27、ts 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 ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. SAE
28、AMS3215M Page 6 of 7 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 specified in the applicable test procedure or, if not s
29、pecified 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 specimens cannot be cut from the product, a separate fl
30、at 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, mechanically slit and flattened into a strip while being extruded, and cured in the
31、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 request. 4.3.1.2 A lot shall be all product from the
32、 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 provided lot identification is maintained. 4.3.1.3 A b
33、atch 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 report of 4.5 shall state that such plan was u
34、sed. 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 supplied, unless such approval be waived by purchaser. Results of tests on production product shall be e
35、ssentially 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 the same as those used on the approved sample product. If necessary to make any change in ingredients,
36、 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, sample product. Production product made by the revised procedure shall not be shipped prior to receipt of
37、 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 performed, to the periodic test requirements, and stating that the product conforms to the other technical
38、requirements. This report shall include the purchase order number, lot number, AMS3215M, vendors compound number, form and size or part number, and quantity. SAE AMS3215M Page 7 of 7 4.6 Resampling and Retesting If any specimen used in the above tests fails to meet the specified requirements, dispos
39、ition 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 product represented. Results of all tests shall be reported. 5. PREPA
40、RATION FOR DELIVERY 5.1 Identification and Packaging Shall be in accordance with AMS2810. 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 conforming to this specification, o
41、r 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 revisions, not editorial changes, have been made to the previous issue of this document. An (R) symb
42、ol to the left of the document title indicates a complete revision of the document, including technical revisions. 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 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. PREPARED BY AMS COMMITTEE “CE“.
