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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 therefr
2、om, 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 2007 SAE International All rights reserved. No part of this publication may
3、 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) Fa
4、x: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS:http:/www.sae.org AEROSPACE MATERIAL SPECIFICATION AMS 3198K IssuedDEC 1942 RevisedAPR 1993 ReaffirmedMAR 2007 Superseding AMS 3198J Sponge, Chloroprene (CR) Rubber Medium Stiffness RATIONALE This document has been reaffirmed to comply wi
5、th the SAE 5-year Review policy. 1.SCOPE: 1.1Form: This specification covers a chloroprene (CR) rubber sponge in the form of sheet, strip, molded shapes, or other forms, as ordered. 1.2Application: These products have been used typically for general applications requiring the use of open-cell, mediu
6、m rubber sponge pads and seals operating from -40 to +80 C (-40 to +176 F), but usage is not limited to such applications. 1.3Safety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materia
7、ls, 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 to take necessary precautionary measures to ensure the health and safety of all personnel
8、 involved. 2.APPLICABLE DOCUMENTS: The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. Copyright SAE I
9、nternational Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 2 - 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrend
10、ale, PA 15096-0001. AMS 2810Identification and Packaging, Elastomeric Products 2.2ASTM Publications: Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM D 1056 Flexible Cellular Materials - Sponge or Expanded Rubber 3.TECHNICAL REQUIREMENTS: 3.1Material: Shall be a com
11、pound, based on a chloroprene (CR) elastomer with agents to form an open-cell sponge, suitably cured to produce a product meeting the technical requirements of this specification. 3.1.1Color: Shall be black. 3.1.2Finish: The top and bottom surfaces of sheet and strip and the exterior surfaces of mol
12、ded parts shall have a natural skin finish. Fabric or wire mesh type of surface impressions are not objectionable. 3.1.3Vulcanized Joints: Vulcanized joints are permissible in molded products where the finished product is larger than is usual industry practice to mold in one section. If a vulcanized
13、 joint is necessary, the joint shall have the same strength, size, and color as the parent material. 3.2Properties: Sponge shall conform to the following requirements; tests shall be performed on the sponge supplied and in accordance with ASTM D 1056 except as otherwise specified herein. 3.2.1Compre
14、ssion Deflection: Shall be 6 to 13 psi (41.4 to 89.6 kPa) at 20 to 30 C (68 to 86F). 3.2.2Specific Volume: Shall be as shown in Table 1 for each nominal thickness; a tolerance of 10% will be allowed: Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/591397
15、7001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 3 - 3.2.3Hydrogen Ion Concentration (pH): Shall be 7.0 1.0, determined in accordance with 4.5.1. 3.2.4Dry Heat Resistance: Shall be as follows, determined in acc
16、ordance with 4.5.2. 3.2.4.1Compression Deflection Change: -5 to +30% 3.2.4.2Specific Volume Change: -10 to +10% 3.2.4.3Bend (Flat): No cracking or checking. 3.2.5Compression Set: Shall be as follows, determined at 70 C 1 (158 F 2) for 22 hours 0.2. 3.2.5.1Percent of Original Deflection: Not higher t
17、han 50. 3.2.5.2Percent of Original Thickness: Not higher than 25. 3.2.6Low-Temperature Flexibility: When specified, the product shall have low-temperature flexibility acceptable to purchaser, determined by a procedure agreed upon by purchaser and vendor. 3.2.7Weather Resistance: When specified, the
18、product shall have weather resistance acceptable to purchaser, determined by a procedure agreed upon by purchaser and vendor. TABLE 1 - Specific Volume Nominal Thickness Inches Nominal Thickness Millimeters Specific Volume Cubic Inches per Pound Specific Volume cm3/gram 1/16 1.6341.23 3/32 2.4401.45
19、 1/8 3.2421.52 3/16 4.8451.63 1/4 6.4471.70 5/16 7.9491.77 3/8 9.5511.84 1/212.7551.99 5/815.9592.13 3/419.0632.28 7/822.2662.38 125.4702.53 1-1/238.1762.75 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MS
20、TNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 4 - 3.2.8Corrosion: 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 vend
21、or. Surface discoloration of metal shall not be considered objectionable. Standards for acceptance shall be as agreed upon by purchaser and vendor. 3.3Quality: The product, as received by purchaser, shall be uniform in quality and condition, smooth, as free from foreign materials as commercially pra
22、cticable, and free from imperfections detrimental to usage of the product. 3.4Tolerances: Shall conform to the following values; measurements shall be made in accordance with ASTM D 1056. 3.4.1Sheet and Strip: 3.4.1.1Thickness: Shall be as specified in Table 2: TABLE 2A - Thickness Tolerance, Inch/P
23、ound Units Nominal Thickness Inches Tolerance, Inch plus and minus Up to 1/8, incl1/64 Over 1/8 to 1/2, incl1/32 Over 1/23/64 TABLE 2B - Thickness Tolerance, SI Units Nominal Thickness Millimeters Tolerance, Millimeters plus and minus Up to 3.2, incl0.4 Over 3.2 to 12.7, incl0.8 Over 12.71.2 Copyrig
24、ht SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 5 - 3.4.1.2Width: Shall be as specified in Table 3: 4.QUALITY ASSURA
25、NCE PROVISIONS: 4.1Responsibility for Inspection: The vendor of sponge shall supply all samples for vendors tests and shall be responsible for performing all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that the sponge conf
26、orms to the requirements of this specification. 4.2Classification of Tests: Tests for all technical requirements are acceptance tests and preproduction tests and shall be performed prior to or on the initial shipment of sponge to a purchaser, on each lot, when a change in ingredients and/or processi
27、ng requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.2.1For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, con
28、tracting officer, or request for procurement. TABLE 3A - Width Tolerance, Inch/Pound Units Nominal Width Inches Tolerance, Inch plus and minus Upto 6, incl1/16 Over 6 to 18, incl1/8 Over 181/4 TABLE 3B - Width Tolerance, SI Units Nominal Width Millimeters Tolerance, Millimeters plus and minus Up to
29、152, incl1.6 Over 152 to 457, incl3.2 Over 4576.4 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 6 - 4.3Samp
30、ling and Testing: Shall be as follows: 4.3.1For AcceptanceTests: Sufficient sponge 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 tha
31、n three. 4.3.1.1A batch shall be all material run through a mixer at one time. 4.3.1.2A lot shall be not more than 2500 pounds (1135 kg) of sponge from one batch. 4.3.1.3When a statistical sampling plan has been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in l
32、ieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used. 4.3.2For Preproduction Tests: As agreed upon by purchaser and vendor. 4.4Approval: 4.4.1Sponge shall be approved by purchaser before sponge for production use is supplied, unless such approval be waived by purchas
33、er. Results of tests on production sponge shall be essentially equivalent to those on the approved sample. 4.4.2Vendor shall use ingredients, manufacturing procedures, processes, and methods of inspection on production sponge which are essentially the same as those used on the approved sample. If ne
34、cessary to make any change in ingredients, 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 sponge. Production sponge made by the revised procedure
35、shall not be shipped prior to receipt of reapproval. 4.5Test Methods: 4.5.1Hydrogen Ion Concentration (pH): Dice approximately 1 cubic inch (16 cm3) of sponge to approximately 1/8 inch (3.2 mm) or smaller cubes and extract with continuous agitation for 60 minutes 6 with 100 mL of freshly distilled w
36、ater. Determine pH of the extract by chemical means or pH meter. 4.5.2Dry Heat Aging: A sample of sponge 4 inches (102 mm) square shall be suspended for 22 hours 0.2 by a wire attached to one corner of the sample in a circulating-air convection oven operating at 100 C 1 (212 F 2). The sample shall b
37、e removed from the oven and trimmed to 2 inches (51 mm) square by removing 1 inch (25 mm) from each side prior to testing. Standard specimens shall be cut from the sample and tested by the procedure used for the sponge as received. Bend test specimens shall be the 1 inch (25 mm) wide strips produced
38、 in trimming the 4-inch (102-mm) square sample to a 2-inch (51-mm) square. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KS
39、AEAMS 3198K - 7 - 4.6Reports: The vendor of sponge shall furnish with each shipment a report showing the results of tests to determine conformance to the technical requirements. This report shall include the purchase order number, lot number, AMS 3198K, vendors compound number, form or part number,
40、and quantity. 4.7Resampling and Retesting: If any specimen used in the above tests fails to meet the specified requirements, disposition of the sponge may be based on the results of testing three additional specimens for each original nonconforming specimen. Failure of any retest specimen to meet th
41、e specified requirements shall be cause for rejection of the sponge represented. Results of all tests shall be reported. 5.PREPARATION FOR DELIVERY: 5.1Identification and Packaging: Shall be in accordance with AMS 2810. 6.ACKNOWLEDGMENT: A vendor shall mention this specification number and its revis
42、ion letter in all quotations and when acknowledging purchase orders. 7.REJECTIONS: Sponge not conforming to this specification, or to modifications authorized by purchaser, will be subject to rejection. 8.NOTES: 8.1The change bar ( l ) located in the left margin is for the convenience of the user in
43、 locating areas where technical revisions, not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification. 8.2Dimensions and properties in inch/pound units and the Celsius temperatu
44、res are primary; dimensions and properties in SI units and the Fahrenheit temperatures are shown as the approximate equivalents of the primary units and are presented only for information. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not fo
45、r Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,- AMS 3198KSAEAMS 3198K - 8 - 8.3For direct U.S. Military procurement, purchase documents should specify not less than the following: Title, number, and date of this specification Form and size or p
46、art number of product desired Quantity of product desired Acceptance standards and test methods for low-temperature flexibility (See 3.2.6), weather resistance (See 3.2.7), and corrosion (See 3.2.8) Level A packaging, if required (See AMS 2810). 8.4Sponge meeting the requirements of this specificati
47、on has been classified under Federal Supply Classification (FSC) 9320. 8.5Key Words: Sheet, strip, molded shapes, open cell PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE“ Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:01:59 MSTNo reproduction or networking permitted without license from IHS -,-,-