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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.
3、A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS 3210GIssued MAR 1951Revised NOV 1996Reaffirmed OC
4、T 2001Superseding AMS 3210FChloroprene (CR) RubberElectrical Resistant65 - 751. SCOPE:1.1 Form: This specification covers a chloroprene (CR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes.1.2 Application: Primarily for parts requiring resistance to electrical breakdown and
5、 the embrittling action of corona and ozone.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 does not address the hazards which may be involved in s
6、uch 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. APPLICABLE DOCUMENTS: The following publications form a part of t
7、his 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.2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AM
8、S 2279 Tolerances, Rubber ProductsMAM 2279 Tolerances, Metric, Rubber ProductsAMS 2810 Identification and Packaging, Elastomeric ProductsCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AM
9、S 3210G- 2 -2.2 ASTM Publications: Available from ASTM, 100 Barr Harbor, West Conshohocken, PA 19428-2959.ASTM D 149 Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power FrequenciesASTM D 150 A-C Loss Characteristics and Permittivity (Diel
10、ectric Constant) of Solid Electrical Insulating MaterialsASTM D 297 Rubber Products - Chemical AnalysisASTM D 395 Rubber Property - Compression SetASTM D 412 Rubber Properties in TensionASTM D 471 Rubber Property - Effect of LiquidsASTM D 518 Rubber Deterioration - Surface CrackingASTM D 573 Rubber
11、- Deterioration in an Air OvenASTM D 624 Rubber Property - Tear ResistanceASTM D 635 Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal PositionASTM D 797 Rubber Property - Youngs Modulus at Normal and Subnormal TemperaturesASTM D 1149 Rubber Deterioration
12、- Surface Ozone Cracking in a Chamber (Flat Specimens)ASTM D 1193 Reagent WaterASTM D 2137 Rubber Property - Brittleness Point of Flexible Polymers and Coated FabricsASTM D 2240 Rubber Property - Durometer Hardness3. TECHNICAL REQUIREMENTS: 3.1 Material: Shall be a compound, based on a chloroprene (
13、CR) elastomer, suitably cured to produce a product meeting the requirements of 3.2.3.2 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:Copyright SAE Internation
14、al Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AMS 3210G- 3 -TABLE 1 - PropertiesParagraph Test Requirement Test Method3.2.1 As Received3.2.1.1 Hardness, Durometer “A“or equivalent 70 5ASTM D 22403.2.1.2 Tensile
15、 Strength,minimum1000 psi(6.89 MPa)ASTM D 412, Die B or C3.2.1.3 Elongation, minimum 400% ASTM D 412, Die B or C3.2.1.4 Tear Resistance,pounds force/inch (kg/m),minimum80% of Prepro-duction ValueASTM D 624, Die B3.2.1.5 Power Factor at 60 Hz,maximum10% ASTM D1503.2.1.6 Dielectric Strength,minimum300
16、 V per mil(11,800 V/mm)ASTM D 149,Short time test,0.080 inch (2.03 mm)thick specimen3.2.1.7 Specific Gravity PreproductionValue 0.02ASTM D 2973.2.2 Oil Resistance(Immediate DeterioratedProperties)3.2.2.1 Tensile StrengthChange, maximum-20%ASTM D 471Medium: ASTM Oil No. 1Temperature: 100 C 1(212 F 2)
17、Time: 70 hours 0.53.2.2.2 Elongation Change,maximum -40%3.2.2.3 Volume Change 0 to +15%3.2.2.4 Decomposition None3.2.2.5 Surface Tackiness None3.2.3 Water Resistance(Immediate DeterioratedProperties)ASTM D 471Medium: ASTM D 1193,Type III, WaterCopyright SAE International Provided by IHS under licens
18、e with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AMS 3210G- 4 -3.2.9 Weathering: The product shall show no evidence of cracking when tested in accordance with ASTMD1149 for 7 days at 40 C 1 (104 F 2). Test specimens shall be prepared and mounte
19、d in accordance with ASTMD518, Method B.TABLE 1 - (Continued)Paragraph Test Requirement Test Method3.2.3.1 Weight Increase, maximum3.2.3.2 Dielectric Strength,minimum 5%200 V per mil(7870 V/mm)Temperature: 20 - 30 C(68 to 86 F)Time: 48 hours 0.53.2.4 Dry Heat Resistance3.2.4.1 Hardness Change, Durom
20、eter“A“ or equivalent 0 to +10ASTM D 573Temperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.4.2 Tensile StrengthChange, maximum -35%3.2.4.3 Elongation Change,maximum3.2.4.3.1 For parts otherthan extrusions -50%3.2.4.3.2 For extruded parts -60%3.2.5 Compression Set3.2.5.1 Percent of OriginalDeflection
21、, maximum85ASTM D 395, Method BTemperature: 100 C 1(212 F 2)Time: 70 hours 0.53.2.6 Low-Temperature Resistance3.2.6.1 Brittleness Pass ASTM D 2137, Method ATemperature: -25 C 1(-13 F 2)3.2.6.2 Youngs Modulus, maximum(See 8.2)50.0 ksi(345 MPa)ASTM D 797Temperature: -35 C 1(-31 F 2)3.2.7 Oxone Resista
22、nce No cracking 4.5.13.2.8 Flame Resistance (See 8.3)Time to cease flamingand glowing 10 seconds 4.5.2Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AMS 3210G- 5 -3.2.10 Corrosion: The p
23、roduct shall not have a corrosive effect on other materials when exposed to conditions normally encountered in service, determined by a procedure acceptable to purchaser. Discoloration of metal shall not be considered objectionable.3.3 Quality: The product, as received by purchaser, shall be uniform
24、 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: Shall conform to all applicable requirements of AMS 2279 or MAM 2279.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for
25、Inspection: The vendor of the product 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 product conforms to the requirements of this
26、 specification.4.2 Classification 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 a product to a purchaser, on each lot, when a change in ingredients and/or processing requires reapproval as in
27、4.4.2, and when purchaser deems confirmatory testing to be required.4.2.1 For 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, contracting officer, or request
28、for procurement.4.3 Sampling and Testing: Shall 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 speci
29、fied therein, not less than three.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AMS 3210G- 6 -4.3.1.1 If specimens cannot be prepared from the product, ASTM test specimens prepared from
30、 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 flat strip test sample from the same production lot shall be supplied upon request. This strip shall be prepared from tubin
31、g 1.000 inch 0.063 (25.40mm1.60) 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 inc
32、hes (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 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 sh
33、all not exceed 500 pounds (227 kg); the lot 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 When a statistical sampling plan ha
34、s been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in lieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used.4.3.2 For Preproduction Tests: As agreed upon by purchaser and vendor.4.4 Approval: 4.4.1 Sample product shall be appro
35、ved by purchaser before product for production use is supplied, unless such approval be waived by purchaser. Results of tests on production product shall be essentially equivalent to those on the approved sample.4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, and methods of
36、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 procedures, vendor shall submit for reapproval a statement of the proposed changes in
37、 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.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without lic
38、ense from IHS-,-AMS 3210G SAE AMS 3210G- 7 -4.5 Test Methods: 4.5.1 Ozone Resistance: Place sufficient mercury in a 500-mL Erlenmeyer flask to form a pool covering the bottom. Place a specimen of the rubber, 0.080x 1 x 1/2 inch (2.03 x 25 x 12.7 mm), in a wooden specimen holder 5/16x1x 1/2 inch (7.9
39、 x 25 x 12.7 mm) with two grooves each 3/16 inch (4.8 mm) deep x 3/32 inch (2.4 mm) wide x 1/2 inch (12.7 mm) long, spaced 1/4 inch (6.4mm) between sides of grooves, so that the specimen forms a half loop. Place specimens in holders in the flask so that the holders float on the mercury near side of
40、flask. Stopper the flask with a rubber stopper through which is inserted an electrode extending to within 1 inch (25 mm) of the surface of the mercury. Place the flask on a metal plate and connect the plate and the electrode to a source of 15,000 V, 60 Hz alternating current. Pass this current throu
41、gh the flask. Examine specimens for cracking after 30 minutes.4.5.2 Flame Resistance: Shall be determined in accordance with ASTMD635, except that the specimen shall be clamped in a vertical position and the flame shall be applied at the lower end of the specimen for 30 seconds1 and then withdrawn.
42、The duration of flaming and glowing in the specimen, after withdrawal of the burner, shall be recorded.4.6 Reports: The vendor of the product shall furnish with each shipment a report showing the results of tests to determine conformance to the acceptance test requirements and stating that the produ
43、ct conforms to the other technical requirements. This report shall include the purchase order number, lot number, AMS 3210G, vendors compound number, form and size or part number, and quantity.4.7 Resampling and Retesting: If any specimen used in the above tests fails to meet the specified requireme
44、nts, 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 requirements shall be cause for rejection of the product represented. Results of all tests shall be reporte
45、d.5. PREPARATION FOR DELIVERY: 5.1 Identification and Packaging: Shall be in accordance with AMS 2810.6. ACKNOWLEDGMENT: A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders.Copyright SAE International Provided by IHS under
46、 license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 3210G SAE AMS 3210G- 8 -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 ) locate
47、d 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 specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including techni
48、cal revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only.8.2 The test for Youngs Modulus is not normally required but is intended to be used as a referee test in case of disagreement on the results of the brittleness test.8.3
49、 The flame resistance test is intended only for comparative evaluation of compounds and is not to be construed as an indication of characteristics of the product under actual fire conditions.8.4 Dimensions and properties in inch/pound units and the Celsius temperatures are primary; dimensions and properties in SI units and the Fahrenheit temperatures are sho
