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: 724-776-4970 (outside USA)
4、 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/AMS3204M AEROSPACE MATERIAL SPECIFICATION AMS3204M Issued 1942-12 Revised 2009-05 Superseding AM
5、S3204L Rubber Synthetic Low-Temperature Resistant 25 - 35 RATIONALE AMS 3204M 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 shapes. 1.2 Application These pro
6、ducts 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 should be considered individually. 1.3 Safety - Hazardous Materials While th
7、e 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 with the safe
8、 and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved. 2. APPLICABLE DOCUMENTS 2.1 The purchase order date shall stipulate the published document that shall be in effect. The supplier may work to a subsequent
9、 revision unless a particular revision is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published revision shall apply. 2.2 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:
10、 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 AMS2817 Packaging and Identification, Preformed Packings SAE AMS3204M Page 2 of 6 2.3 ASTM Publications Available from ASTM
11、 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 - Effect of Liquids ASTM D 573 Rubber P
12、roperty - 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 - Brittleness Point of Flexible Polymers an
13、d 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 Properties The product shall conform to the
14、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 TEST REQUIREMENTS Property Requirement Test Method 3.2.1 Hardness, Durometer “A” or equivalent 30 5 ASTM D 2240 3.2.2 Tensile Strength, m
15、in 1000 psi (6.9 MPa) ASTM D 412, Die B or C 3.2.3 Elongation, min 350% ASTM D 412, Die B or C 3.2.4 Tensile Stress at 100% Elongation, max 200 psi (1.38 MPa) 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 Va
16、lue 0.02 ASTM D 792 (Hydrostatic Method) 3.2.7 Petroleum Hydraulic 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 “A” or equivalent -15 to +5 Time: 70 hours 0.5 3.2.7.2 Tensile Strength Change, max -60% 3.2.7.3 Elongation Change, max
17、-35% 3.2.7.4 Volume Change 0 to +75% 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 Change, 0 to +15 Time: 70 hours 0.5 SAE AMS3204M Page 3 of 6 Durometer “A” or equivalent TABLE 1 TEST REQUIREMENTS (CONT
18、INUED) Property Requirement Test Method 3.2.8.2 Tensile Strength Change, max -35% 3.2.8.3 Elongation Change, max -35% 3.2.9 Compression Set Percent of Original Deflection, max 75 ASTM D 395 Method B Time: 70 hours 0.5 3.2.10 Low-Temperature Resistance 3.2.10.1 Brittleness Pass ASTM D 2137 Method A T
19、emperature: -40 F 1 (-40 C 2) 3.2.11 Weathering Cracking or Checking at 20% Extension None ASTM D 1149 Temperature: 104 F 2 (40 C 1) Time: 168 hours 1 3.3 Dimensions and Tolerances Dimensions and tolerances shall be as specified in the parts standard, drawing or purchase document. Shall conform to a
20、ll applicable requirements of AMS 2279 . 3.4 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 handling procedures. 3.5 Quality Products, as received b
21、y purchaser, shall be uniform in quality and condition, smooth, as free from foreign material as commercially practicable, and free from imperfections detrimental to usage of the product. 4. RESPONSIBILITY FOR INSPECTION The manufacturer of the product shall be responsible for performance of all req
22、uired tests. Purchaser reserves the right to sample and perform any testing deemed necessary to ensure that the product conforms to the AMS requirements. 4.1 Classification of Tests 4.1.1 Acceptance Tests Requirements shown in Table 2 are acceptance tests and shall be performed on each lot: TABLE 2
23、- ACCEPTANCE TESTS Requirements Paragraph Hardness, 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 4.1.1.1 Lot: A quantity of one size of product processed and packaged as one production entity from a batch 4.1.1
24、.2 Batch: The quantity of compound run through a mill or mixer at one time. SAE AMS3204M Page 4 of 6 4.1.1.3 Random Sampling The method shall be as specified in the parts standard, drawing or purchase document. If not specified, product shall be taken at random from each lot to perform all the requi
25、red acceptance tests. The number of test iterations for each requirement shall be specified in the applicable test procedure. 4.2.2 Preproduction Tests All technical requirements are preproduction tests and shall be performed by the manufacturer prior to or on the initial shipment of the product, wh
26、en 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 Sampling and Testing Shall be as follows: 4.2.1 For Acceptance Tests Sufficient product shall be taken at random from each lot to perform all required tests
27、. 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 otherwise specified in 4.3.1.4. 4.2.1.1 If specimens cannot be prepared from the product, ASTM test specimens prepared from the same
28、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 request. This strip shall be prepared from tubing 1.000 in
29、ch 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 from which test specimens cannot be cut, a slab 6 inches (152
30、 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. 4.2.1.2 A statistical sampling plan 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 sho
31、wn 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 Size 2 to 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
32、to 150,000 56 150,001 and Over 65 4.2.2 For Preproduction Tests Acceptable to purchaser or as stated in the contract. SAE AMS3204M Page 5 of 6 4.3 Approval 4.3.1 Sample product shall be approved by the purchaser before product for production use is supplied, unless such approval is waived by the pur
33、chaser. 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 not be shipped prior to receipt of reapproval. If necessary to make any change in parameters for the process control factors, man
34、ufacturer shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and when requested, sample product. 4.3.2 Manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on production product which are essentially the same
35、 as those used on the approved sample. 4.3.2.1 Control factors for producing products include, but are not limited to, the following: Compound ingredients and proportions thereof within established limits Sequence of mixing compound ingredients Type of mixing equipment Method and equipment for prepa
36、ring preforms Basic molding procedure (compression, transfer, injection) Curing time and pressure; variations of 10% are permissible Finishing methods Methods of inspection 4.3.2.2 Any of the above process control factors for which parameters are considered proprietary by the manufacturer may be ass
37、igned a code designation. Each variation in such parameters shall be assigned a modified code designation. 4.4 Reports The supplier of the product shall make readily available a report showing the results of tests to determine conformance to the acceptance requirements and stating that the product c
38、onforms to the other technical requirements. This report shall include AMS number with revision, manufacturers identification and product designation, batch/lot number and date of manufacture. For products requiring source inspection, reports shall be stamped by the third party source inspector. 4.5
39、 Resampling and Retesting If any specimen fails, a retesting of three additional specimens for each nonconforming specimen shall be necessary for product acceptance. The same batch/lot of product used for the failed test shall be used for retesting. Failure of any retest specimen shall be cause for
40、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 accordance with AMS 2817. A lot may be packaged in s
41、mall quantities and delivered under the basic lot approval provided lot information in maintained. SAE AMS3204M Page 6 of 6 5.1.1 Each package, box, and shipping container shall be permanently and legibly marked with the following when pertinent: Specification number AMS number with revision, class,
42、 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 revision letter in all quotations and when ackno
43、wledging 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 (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, no
44、t editorial changes, have been made to the previous issue of a document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revision. Change bars and (R) are not used in original publications, nor in documents that contain editorial cha
45、nges 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 Purchase orders should specify not less than the following: AMS3204M Quantity of product desired Method of test and acceptance standards for corrosion (See 3.2.7) Special packaging, if required. 8.4 IRM 903, is available from Calumet Lubricant Company, Indianapolis, IN 317-328-5660. PREPARED BY AMS COMMITTEE “CE”
