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 2011 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/AMS3220G AEROSPACE MATERIAL SPECIFICATION AMS3220 REV. G Issued 1940-01 Reaffirmed 2003-11 Re
5、vised 2011-05Superseding AMS3220F Rubber, Synthetic General Purpose, Fluid Resistant 55 - 65 RATIONALE AMS3220G results from a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers a synthetic rubber in the form of sheet, strip, tubing, extrusions, and molded
6、 shapes. 1.2 Application Primarily for packing and sealing joints which come in contact with aircraft fuels, hot petroleum-base lubricating oils, and ethylene glycol from -20 to +220 F (-29 to +104 C) This material has fair resistance to all fluids listed. Where better resistance to a particular flu
7、id is required, use the AMS for material compounded specifically for good resistance to that fluid. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification
8、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 personnel involved. 2. APPLICABL
9、E 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 specified. When the referenced document has
10、 been cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE AMS3220G Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-7
11、76-4970 (outside USA), www.sae.org. AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products 2.2 ASTM Publications 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
12、297 Standard Test Methods for Rubber Products - Chemical Analysis ASTM D 412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 471 Standard Test Method for Rubber Property - Effect of Liquids ASTM D 573 Standard Test Method for Rubber - Deterioration in an Air
13、 Oven ASTM D 2240 Standard Test Method for Rubber Property - Durometer Hardness ASTM D 3182 Standard Practice for Rubber Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets. 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a compound, based on a
14、 synthetic elastomer, suitably cured to produce a product meeting the requirements of 3.2. 3.1.1 Toxicological Formulations The material shall have no adverse effects on the health of personnel when used for its intended purpose in accordance with manufacturers instructions and with appropriate hand
15、ling procedures. 3.2 Physical Properties The product shall conform to the following requirements; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable 3.2.1 Original Properties 3.2.1.1 Hardness, Durometer ASTM D 2240 “A“ or equivalent
16、 60 5 3.2.1.2 Elongation, minimum 200% ASTM D 412, Die B or C 3.2.1.3 Specific Gravity Preproduction ASTM D 297 Value 0.02 SAE AMS3220G Page 3 of 6 3.2.2 Petroleum Lubricating Oil Resistance: ASTM D 471 (Immediate Deteriorated) Medium: ASTM Oil No. 1 Properties) Temperature: 302 F 5 (150 C 3) Time:
17、5 hours 0.2 3.2.2.1 Hardness, Durometer “A“ or equivalent 50 to 70 3.2.2.2 Elongation, minimum 150% 3.2.2.3 Decomposition None 3.2.2.4 Surface Tackiness None 3.2.3 Aliphatic Fuel Resistance: ASTM D 471 (Immediate Deteriorated Medium: ASTM Ref. Fuel A Properties) Temperature: 68 to 86 F (20 to 30 C)
18、Time: 5 hours 0.2 3.2.3.1 Elongation, minimum 200% 3.2.3.2 Volume Change 0 to +30% 3.2.3.3 Decomposition None 3.2.3.4 Surface Tackiness None 3.2.4 Dry Heat Resistance ASTM D 573 Temperature: 212 F 2 (100 C 1) Time: 15 hours 0.5 3.2.4.1 Hardness, Durometer “A“ or equivalent, maximum 70 3.2.4.2 Elonga
19、tion, minimum 150% 3.3 Dimensions and Tolerances Dimensions and tolerances shall be as specified in the parts standard, drawing or purchase document. If not specified, the requirements of AMS2279 shall apply. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manufacturer of the p
20、roduct shall be responsible for assuring that all required testing and product inspection has been performed. Unless specified otherwise by contractual requirements, testing may be performed either at the product vendors own test facility, at the mixer, or at a suitable independent test facility. Pu
21、rchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the product conforms to the requirements of this AMS specification. SAE AMS3220G Page 4 of 6 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for the following requirements are accept
22、ance tests and shall be performed on each lot: TABLE 1 Requirement Paragraph Reference Hardness, Original Properties 3.2.1.1 Elongation, Original Properties 3.2.1.2 Elongation Change in Oil 3.2.2.2 Volume Change in Fuel 3.2.3.2 4.2.2 Qualification Tests Qualification testing shall consist of all of
23、the physical property requirements listed in 3.2 and shall be performed prior to certification of materials to this specification, when a change in ingredients and/or processing requires reapproval as in 4.5.2, and/or when purchaser deems confirmatory testing to be required. 4.2.3 Test Samples 4.2.3
24、.1 For qualification testing, specimens shall be prepared from 6 inch (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick molded test slabs per ASTM D 3182 compounded for the same intended curing process as the end product. 4.2.3.2 For acceptance testing, sufficient material shall be taken at r
25、andom from each lot of product to provide specimens 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. If specimens cannot be prepared from the product, test specim
26、ens prepared from the same batch of material and in the same state of cure as the product shall be used. At a minimum, specific gravity tests shall be conducted on the end item or a section removed from the end item (except as noted in 4.2.3.2.3). 4.2.3.2.1 When the product supplied is an extrusion
27、of such shape that suitable test specimens cannot be cut from the product, a separate extruded flat strip test sample, 0.075 inch 0.008 (1.90 mm 0.20) thick, produced from the same production batch of compound, in the same state of cure as the product being supplied, shall be used to prepare test sp
28、ecimens. 4.2.3.2.2 When the product is a molded item of such shape that suitable test specimens cannot be cut, a slab 6 inches (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick per ASTM D 3182, molded from the same batch of compound, in the same state of cure as the product being supplied, sh
29、all be used to prepare test specimens. 4.2.3.2.3 When the mixer of the material is not the actual manufacturer of the end product, specimens shall be prepared from 6 inch (152 mm) square by 0.075 inch 0.008 (1.90 mm 0.20) thick molded test slabs per ASTM D 3182, catalyzed and cured to an optimum sta
30、te of cure. 4.2.3.3 Specimen Test Values All individual specimen test result values used to determine pass/fail criteria must be within acceptable limits as indicated in 3.2. Where test methods dictate that results be reported as average or median values, failed values shall not be allowed in these
31、determinations. SAE AMS3220G Page 5 of 6 4.2.3.3.1 If any specimen fails to meet the pass/fail criteria as listed in Table 1, a retesting of three (3) additional specimens with acceptable results for each nonconforming specimen, shall be necessary for acceptance. The same material batch as was used
32、for the failed test shall be used for retesting. Failure of any retest specimen shall be cause for rejection of the batch along with the rejection of any product that may have been produced from the batch. Results of all tests shall be reported. Records of all rejections shall be maintained. 4.3 Ind
33、ividual specimen failures that occur due to obvious flaws in the specimen itself or because of mechanical failure of the test equipment, may be disregarded with only a single retest specimen required for acceptance. All such occurrences must be recorded. 4.4 Sampling When a statistical sampling plan
34、 for product acceptance has been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan and the report of 4.6 shall state that such plan was used. Otherwise sampling shall be in accordance with ANSI/ASQ-Z1.4, Single Sampling Plan, Inspection Level II, AQL 1.0, except tha
35、t the acceptance number shall be zero (0). 4.4.1 A lot shall be all product from the same batch 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 packaged in smaller quantities a
36、nd delivered under the basic lot approval provided lot identification is maintained. 4.4.2 A batch shall be the quantity of compound run through a mill or mixer at one time. 4.5 Certification Certification to this material specification shall only be permitted if all testing requirements specified i
37、n 4.2 have been met. 4.6 Approval 4.6.1 When the contract requires that sample product be submitted for approval by the purchaser before product for production use is supplied, results of tests on production product shall be essentially equivalent to those on the approved sample. 4.6.2 The vendor(s)
38、 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 equipment for processing, or in manufacturing procedure
39、s, vendor shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample product. Product manufactured utilizing the changes submitted for approval shall not be shipped prior to receipt of reapproval. 4.7 Reports The supplier of the produ
40、ct, as well as the mixer, that certifies to this specification, shall make readily available a report showing the results of tests to determine conformance to the acceptance requirements and/or qualification requirements. The report shall state that the product/material conforms to the technical req
41、uirements of this specification. This report shall include this AMS number with revision, manufacturers identification and product designation, batch/lot number and date of manufacture. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification Shall be as specified in the parts standard, drawing
42、or purchase document. If not specified, shall be as follows: Packaging shall be in accordance with AMS2810. A lot may be packaged in small quantities and delivered under the basic lot approval provided lot information is maintained. SAE AMS3220G Page 6 of 6 5.1.1 Each package, box, and shipping cont
43、ainer shall be permanently and legibly marked with the following when pertinent: AMS number with revision Manufacturers identification Manufacturers product designation Batch/lot number Date of manufacturing/packaging Shelf life expiration date Storage conditions 6. ACKNOWLEDGMENT A vendor shall men
44、tion this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS Product not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8. NOTES A change bar (l) located in the left margin
45、 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) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and
46、 (R) are not used in original publications, nor in documents that contain editorial changes only. 8.1 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. 8.2 Purchase documents should specify not less than the following: AMS3220G Form and size or part number of product desired Quantity of product desired. PREPARED BY AMS COMMITTEE “CE“
