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 theref
2、rom, 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 2010 SAE International All rights reserved. No part of this publication ma
3、y 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 US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3205MAEROSPACEMATERIALSPECIFICATIONAMS3205 REV. M Issued 1942-12 Revised 2010-05 Superseding
5、 AMS3205L Synthetic Rubber Low-Temperature Resistant 45 - 55 RATIONALEAMS3205M 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, molded shapes, and extrusions. 1.2 Application These pr
6、oducts have been typically used for parts, such as sleeves, fairings, grommets, and window channels, where resistance to low temperature is of prime importance, but usage is not limited to such applications. Each application, however, should be considered individually. 1.3 Safety - Hazardous Materia
7、ls 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 such use. It is the sole responsibility of the user to ensure familiarity wi
8、th 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. SAE AMS3205M Page 2 of 72. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part
9、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 been cancelled and no superseding document has been specified, the last published issue of that document
10、shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.AMS2279 Tolerances, Rubber Products AMS2810 Identification and Packaging, Elastomeric Products 2
11、.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 395 Rubber Property - Compression Set ASTM D 412 Vulcanized Rubber and Thermoplastic Elastomers - Tension ASTM D 471 Rubber Property
12、- Effect of Liquids ASTM D 573 Rubber Property - Deterioration in an Air Oven ASTM D 624 Rubber Property - Tear Resistance ASTM D 792 Rubber Property - Specific Gravity ASTM D 1149 Rubber Property - Deterioration - Surface Ozone Cracking in a Chamber (Flat Specimens) ASTM D 2137 Rubber Property - Br
13、ittleness 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 a synthetic elastomer, usually polychloroprene, suitably cured to produce a product meeting the requirements of 3.2. 3.2 Prope
14、rties The product shall conform to the following requirements in Table 1 and 3.2.12; tests shall be performed on the product supplied and in accordance with specified test methods, insofar as practicable: SAE AMS3205M Page 3 of 7TABLE 1 - PROPERTIESProperty Requirement Test Method 3.2.1 Hardness, Du
15、rometer “A” or equivalent 50 5 ASTM D 2240 3.2.2 Tensile Strength, min 1200 psi (8.27 MPa) ASTM D 412, Die B or C 3.2.3 Elongation, min ASTM D 412, Die B or C 3.2.3.1 For parts other than extrusions 300% 3.2.3.2 For extruded parts 225% 3.2.4 Tensile Stress at 100% Elongation, max 400 psi (2.76 MPa)
16、ASTM D 412, Die B or C 3.2.5 Tear Resistance, min 100 pounds force/inch (17.5 kN/m) ASTM D 624, Die B 3.2.6 Specific Gravity Preproduction Value 0.02 ASTM D 792 (Hydrostatic Method) 3.2.7 Oil Resistance ASTM D 471 IRM 903 oil (See 8.5) Temperature: 158 F 2 (70 C 1) 3.2.7.1 Hardness Change, Durometer
17、 “A” or equivalent -20 to +5 Time: 70 hours 0.5 3.2.7.2 Tensile Strength Change, max -60%3.2.7.3 Elongation Change, max -70% 3.2.7.4 Volume Change 0 to +80% 3.2.7.5 Decomposition None 3.2.7.6 Surface Tackiness None 3.2.8 Dry Heat Resistance ASTM D 573 Temperature: 212 F 2 (100 C 1) 3.2.8.1 Hardness
18、Change, Durometer “A” or equivalent 0 to +15 Time: 70 hours 0.53.2.8.2 Tensile Strength Change, max -20%3.2.8.3 Elongation Change, max -40% 3.2.9 Compression Set Percent of Original Deflection, max 75ASTM D 395 Method B Temperature: 212 F 2 (100 C 1) Time: 70 hours 0.5 3.2.10 Low-Temperature Resista
19、nce ASTM D 2137 Method A Temperature: -40 F 1 3.2.10.1 Brittleness Pass (-40 C 2) 3.2.11 Weathering ASTM D 1149 Temperature: 104 F 2 (40 C 1) 3.2.11.1 Cracking or Checking at 20% Extension NoneTime: 168 hours 1 SAE AMS3205M Page 4 of 73.2.12 Corrosion The product shall not have a corrosive effect on
20、 other materials when exposed to conditions normally encountered in service. Test procedures and acceptance standards shall be as agreed upon by purchaser and supplier. Discoloration of metal shall not be considered objectionable. If a specific test procedure is not specified by the purchaser, then
21、acceptance shall be based upon a nil rating when tested in accordance with the corrosion test procedure contained in ASTM D 1414. 3.3 Quality Products, as received by purchaser, shall be uniform in quality and condition, smooth, as free from foreign material as commercially practicable, and free fro
22、m imperfections detrimental to usage of the product. 3.4 Dimensions and Tolerances Dimensions and tolerances shall be as specified in the parts standard, drawing or purchase document. If not specified, shall conform to all applicable requirements of AMS2279. 3.5 Toxicological Formulations The materi
23、al shall have no adverse effects on the health of personnel when used for its intended purpose in accordance with manufacturers instructions and with appropriate handling procedures. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for INspection The manufacturer of the product shall supply all sa
24、mples and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample 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 requir
25、ements shown in Table 2 are acceptance tests and shall be performed on each lot: TABLE 2 - ACCEPTANCE TESTS RequirementParagraphReferenceHardness, as received 3.2.1 Tensile Strength, as received 3.2.2 Elongation, as received 3.2.3 Volume Change in Oil 3.2.7.4 Compression Set 3.2.9 4.2.1.1 Lot A quan
26、tity of one size of product processed as one production entity from a batch 4.2.1.2 Batch The quantity of compound run through a mill or mixer at one time. SAE AMS3205M Page 5 of 74.2.1.3 Random Sampling The method shall be as specified in the parts standard, drawing or purchase document. If not spe
27、cified, product shall be taken at random from each lot to perform all the required acceptance tests. The number of test iterations for each requirement shall be specified in the applicable test procedure. 4.2.1.4 Sample shall be from a production batch/lot. 4.2.2 Preproduction Tests All technical re
28、quirements are preproduction tests and shall be performed by the manufacturer prior to or on the initial shipment of the product, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.3 Sampling and Testing Sha
29、ll 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 specified therein, not less than three except as o
30、therwise specified in 4.3.1.2. 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 shape that suitable test specimens cannot be cut from the product, a separate f
31、lat 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
32、 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 statistical sampling plan acceptab
33、le 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 acceptable based on zero defects. TABLE 3 - VISUAL AND DIMENSIONAL INSPECTION Lot Size Sample Size2 to 8 Entire
34、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 56 150 001 and Over 65 SAE AMS3205M Page 6 of 74.3.2 For Preproduction Tests Acceptable to purchaser or as stated in the contract. 4.4 Approval 4.4.1 Sample p
35、roduct shall be approved by the purchaser before product for production use is supplied, unless such approval is waived by the purchaser. Results of the tests on production product shall be essentially equivalent to those on the approved sample. Production product made by the revised procedure shall
36、 not be shipped prior to receipt of reapproval. If necessary to make any change in parameters for the process control factors, manufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and when requested, sample product. 4.4.2 Manufacturer shall us
37、e ingredients, manufacturing procedures, processes, and methods of inspection on production product which are essentially the same as those used on the approved sample. 4.4.2.1 Control factors for producing products include, but are not limited to, the following: Compound ingredients and proportions
38、 thereof within established limits 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 inspecti
39、on 4.4.2.2 Any of the above 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 supplier of the product shall make readily avail
40、able a report showing the results of tests to determine conformance to the acceptance requirements and stating that the product conforms to the other technical requirements. This report shall include AMS number with revision, manufacturers identification and product designation, batch/lot number and
41、 date of manufacture.4.6 Resampling and Retesting If any specimen fails, a retesting of three additional specimens for each nonconforming specimen shall be necessary for product acceptance. Whenever possible the same batch/lot of product as was used for the failed test shall be used for retesting. F
42、ailure of any retest specimen shall be cause for rejection. Results of all tests shall be reported. 5. PREPARATION FOR DELIVERY 5.1 Packaging and Identification Shall be as specified in the parts standard, drawing or purchase document. If not specified, shall be as follows: packaging shall be in acc
43、ordance with AMS2810. A lot may be packaged in small quantities and delivered under the basic lot approval provided lot information is maintained. SAE AMS3205M Page 7 of 75.1.1 Each package, box, and shipping container shall be permanently and legibly marked with the following when pertinent:Specifi
44、cation number AMS number with revision, class, grade, and type Manufacturers identification Manufacturers product designation Batch/lot number Date of manufacturing/packaging Shelf life expiration date Storage conditions 6. ACKNOWLEDGMENT A supplier shall mention this specification number and its re
45、vision 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 8.1 A change bar (l) located in the left margin is for the convenience of the user i
46、n 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 (R) are not used in original publica
47、tions, 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. 8.3 IRM 903, is available from Calumet Lubricant Company, Indianapolis, IN 317-328-5660. PREPARED BY AMS COMMITTEE “CE”
