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 2009 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/AMS3260C AEROSPACE MATERIAL SPECIFICATION AMS3260 REV. C Issued 1973-05 Reaffirmed 2001-04 Re
5、vised 2009-11 Superseding AMS3260B Ethylene-Propylene-Diene (EPDM) Rubber General Purpose 45 - 55 RATIONALE AMS3260C is a Five Year Review and update of this specification. 1. SCOPE 1.1 Form This specification covers an ethylene propylene (EPDM) rubber in the form of sheet, strip, tubing, extrusions
6、, and molded shapes. 1.2 Application This products has been used typically for parts, such as door seals, low-pressure gaskets, dust covers, and shock absorption devices, requiring resistance to weathering, phosphate ester base hydraulic fluids, and polar solvents such as steam, water, and ketones,
7、but usage is not limited to such applications. This material has fair resistance to all materials listed. Where better resistance to a particular fluid is required, use an AMS for the material compounded specifically for good resistance to that fluid. 1.3 Safety-Hazardous Materials While the materia
8、ls, 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 such use. It is the sole responsibility of the user to ensure familiarity with the safe and prop
9、er use of any hazardous materials and 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 specifie
10、d herein. The supplier may work to a 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 AMS3260C Page 2 of 6 2.1 SA
11、E Publications Available from SAE International, 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 AMS2810 Identification and Packaging, Elastomeric Products 2.2 ASTM Publicatio
12、ns 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 Standard Test Methods for Rubber Products - Chemical Analysis ASTM D 395 Standard Test Methods for Rubber Property - Compression Set ASTM D 412 St
13、andard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers -Rubber Properties in Tension ASTM D 573 Standard Test Methods for Rubber - Deterioration in an Air Oven ASTM D 624 Standard Test Methods forTear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers ASTM D 2137
14、 Standard Test Methods for Rubber Property - Brittleness Point of Flexible Polymers and Coated Fabrics ASTM D 2240 Standard Test Methods for Rubber Property - Durometer Hardness 3. TECHNICAL REQUIREMENTS 3.1 Material Shall be a compound, based on an ethylene propylene terpolymer (EPDM) elastomer, su
15、itably cured to produce a product meeting the requirements of 3.2. 3.2 Properties The product shall conform to the following requirements in Table 1; tests shall be performed on the product supplied and in accordance with specified ASTM methods, insofar as practicable: TABLE 1 - PROPERTIES Paragraph
16、 Property Requirement Test Method 3.2.1 As Received 3.2.1.1 Hardness, Durometer “A” or equivalent 50 5 ASTM D 2240 3.2.1.2 Tensile Strength, minimum 1800 psi (12.4 MPa) ASTM D 412 3.2.1.3 Elongation, minimum 400% ASTM D 412 3.2.1.4 Tear Resistance, minimum 100 pounds force per inch (17.5 kN/m) of wi
17、dth ASTM D 624, Die C 3.2.1.5 Specific Gravity Preproduction Value 0.02 ASTM D 297 3.2.2 Dry Heat Resistance ASTM D 573 Temperature: 212 F 2 (100 C 1) Time: 70 hours 0.5 3.2.2.1 Hardness Change, Durometer “A” or equivalent 0 to +10 3.2.2.2 Tensile Strength Change 0 to +25% 3.2.2.3 Elongation Change
18、0 to -50% SAE AMS3260C Page 3 of 6 TABLE 1 PROPERTIES (CONT.) Paragraph Property Requirement Test Method 3.2.3 Compression Set ASTM D 395, Method B Temperature: 158 F 2 (70 C 1) Time: 22 hours 0.253.2.3.1 Percent of Original Deflection, maximum 30 3.2.4 Low-Temperature Resistance ASTM D 2137, Method
19、 A Temperature: -67 F 2 (-55 C 1) 3.2.4.1 Brittleness Pass 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. 3.4 Tolerances
20、 Shall conform to all applicable requirements of AMS2279. 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 performance of all required tests. Purchaser reserves the right to sample
21、and to perform any confirmatory testing deemed necessary to ensure that the product conforms to specified requirements. 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. TABLE 2 - ACCEPTANCE TESTS Requirem
22、ent 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 3.2.1.5 Quality 3.3 Tolerances 3.4 4.2.2 Preproduction Tests Tests for all technical requirements are preproduction tests and shall be performed prior to or on the initi
23、al 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 AMS3260C Page 4 of 6 4.2.2.1 Manufacturer shall use ingredients, manufacturing procedures, processes, and metho
24、ds of inspection on production product which are essentially the same as those used on the approved sample. If necessary to make any change in ingredients, in type of equipment for processing, or in manufacturing procedures, manufacturer shall submit for reapproval a statement of the proposed change
25、s 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. 4.3 Sampling and Testing Shall be as follows: 4.3.1 For Acceptance Tests Sufficient product shall be taken at random from eac
26、h 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. 4.3.1.1 If specimens cannot be prepared from the product, ASTM test specimens prepared from the same batch
27、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 request. This strip shall be prepared from tubing 1.000 inch 0.0
28、63 (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 from which test specimens cannot be cut, a slab 6 inches (152 mm) s
29、quare by 0.075 inch 0.008 (1.90 mm 0.20) molded from the same batch of compound 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. An inspection lot shall not exceed 500
30、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 batch shall be the quantity of compound run through a mill or mixer at one time. 4.3.1.4 Final inspection Sampling Plan; A statistical sampling pl
31、an acceptable to the purchaser may be used in lieu of sampling as in 4.3.1. Sample size for visual and dimensional requirements shall be as shown in Table 3; sample unit shall be one molded part and acceptance based on zero defects. TABLE 3 Visual and Dimensional Inspection Lot Size Sample Size 2 to
32、 8 Entire Lot 9 to 90 8 91 to 150 12 151 to 280 19 281 to 500 21 501 to 1200 27 1201 to 3200 35 3201 to 10,000 38 10,001 to 35,000 46 35,001 to 150,000 56 150,001and and Over 65 4.3.2 For Preproduction Tests As agreed upon by purchaser and manufacturer. SAE AMS3260C Page 5 of 6 4.4 Approval 4.4.1 Ma
33、nufacturer shall establish for each size of part, parameters for the process control factors which will produce parts meeting the technical requirements of this specification. These shall constitute the approved procedures and shall be used for manufacturing production of parts. If necessary to make
34、 any changes in the parameters for process control factors, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients, and/or processing. Products manufactured using a revised procedure shall be shipped prior to reapproval in writing. Manufacturer shall use ingredie
35、nts, manufacturing procedures, processes, and methods of inspection, which are essentially the same as those used on the approved sample. 4.4.1.1 Control factors for producing products include but are not limited to, the following: Compound ingredients and proportions thereof within established limi
36、ts Sequence of mixing compound ingredients Type of mixing equipment Method and equipment for preparing preforms Basic molding procedure (compression, transfer, injection) Curing time and pressure; variations of +/- 10% are permissible Finishing methods Methods of inspection 4.4.1.2 Any of the above
37、process control factors for which parameters are considered proprietary by the manufacturer may be assigned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.5 Reports The vendor of the product shall furnish with each shipment a report showing the
38、 results of tests to determine conformance to the acceptance test requirements and stating that the product conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS3260C, vendors compound number, form and size or part number, and quantity. 4.
39、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. Failure of any retest specimen to meet the specified req
40、uirements shall be cause for rejection of the product represented and no additional testing shall be permitted. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Identification and Packaging Shall be as stated on the purchase order or contract requirement, when no requirements
41、are stipulated, 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, or to modifications authoriz
42、ed by purchaser, will be subject to rejection. SAE AMS3260C Page 6 of 6 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) symbol
43、 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 tempe
44、ratures 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: AMS3260C Form and size or part number of product desired Quantity of product desired. PREPARED BY AMS COMMITTEE “CE”
