1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandard
2、snavy.mil, with the subject line “Document Comment”. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. FSC 5970 METRIC A-A-59877 9 September 2010 COMMERCIAL ITEM DESCRIPTION INSULATING
3、 COMPOUND, ELECTRICAL, EMBEDDING The General Services Administration has authorized the use of this commercial item description, for all federal agencies. 1. SCOPE. This commercial item description covers a general purpose casting and potting compound which has excellent electrical and hydrolytic st
4、ability characteristics. The purpose of the compound is to preserve the electrical properties of the equipment to which it is applied by sealing against such environmental conditions as moisture, dirt, fumes, fungus, or other deleterious substances which may be encountered in Military service. 2. CL
5、ASSIFICATION. Electrical embedding insulating compounds shall be classified as types in accordance with 2.1. 2.1 Type (see 7.2). Type 1 Single component compound. Type 2 Multi-component compound. 3. SALIENT CHARACTERISTICS. 3.1 Commercial standard. The electrical insulating compound shall be based o
6、n a bisphenol-A epoxy-based polymer with curing agent as specified herein. 3.2 Characteristics. 3.2.1 Cure. When mixed according to the manufacturers instructions, the compound shall cure at a temperature less than 130 degrees Celsius (C) 266 degrees Fahrenheit (F) and meet the properties specified
7、herein. 3.2.2 Fillers and additives. Fillers and additives may be added to the compound but shall be uniformly dispersed throughout the compound. Fillers shall not agglomerate or irreversibly settle during storage. Fillers shall not settle during application or cure. Phase separation shall not occur
8、 with any component of the compound during working life or cure. 3.2.3 Toxicity. The components, individually or mixed, and the cured product shall not have any adverse effect on the health of personnel when used for its intended use. 3.3 Properties of individual components. 3.3.1 Color. Color addit
9、ives may be used. 3.3.2 Volatile content. The components shall be free of non-reactive, volatile solvents. The total volatile matter measured in each component shall be less than 1 percent by weight. 3.4 Properties of the mixed, uncured compound. 3.4.1 Pot life. The pot life at 23 C (73.4 F) shall b
10、e between 30 and 45 minutes. 3.4.2 Viscosity. The viscosity shall be a maximum of 25,000 Centipoises (cps) (16.8 lbm/ft sec). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59877 3.5 Properties of the cured product. When cured as specified, the
11、properties of the product shall be as specified in table I. TABLE I. Quantitative requirements. Property Units Value Requirement Volatile content, max. %WT 1.0 ASTM D1259, Method B Pot life, min. Minutes 30-45 3.5.4 Viscosity, max. CPS 25,000 ASTM D2196, Method A Working life, min. Minutes 30 3.5.2
12、Flammability, extent of burning, max. cm (inch) 2.54 (1) ULVN Specific gravity 1/ASTM D792, Method A Mean hardness, min. Shore D 75 ASTM D2240 Average tensile strength, min. Bar (atm) 482.7 (476) ASTM D638, Type I Average elongation, min. Percent 2.0 ASTM D638, Type I Average water absorption, max.
13、Percent 0.2 ASTM D570, 24 hour immersion Mechanical shock, min. Grams 1360 3.5.1 Average notched Izod impact, min. J/cm (ft-lb/in) 0.1602 (.3) ASTM D256, Method A Thermal shock, min. Cycles 10 Standard industry method Average thermal expansion coefficient, max. cm/cm/C (in/in/F) 30 x 10-5 (16.7 x 10
14、5) ASTM D696 Thermal conductivity coefficient, min. Cal-cm/sec-cm2-C(ft-lb in/sec-ft2-F) 2.5 x 10-4 (0.1569) Standard industry method Dielectric strength, min. kV/mm (V/mil) 12.79 (325) ASTM D149 Dielectric constant, max. At 60 Hz At 1 MHz - - 5.0 4.5 ASTM D150 Dissipation factor, max. At 60 Hz At
15、1 MHz - - 0.04 0.05 ASTM D150 Arc resistance, min. Seconds 50 ASTM D495 Volume resistivity, min. Ohm-cm (ohm-in) 10 (3.94) 1/ 3/ASTM D257 Hydrolytic stability: Average hardness, max. Average volume resistivity, max. Percent 2/Ohm-cm (ohm-in) 3/10 10 (3.94) 1/ 2/ASTM D2240 ASTM D257 Fungus resistance
16、 - Grade 0 MIL-STD-810, Method 508 Operating temperature C (F) -32 to 130 (25.6 to 266) 3.5.3 NOTES: 1/Informational purposes only. 2/Percent reduction after aging. 3/Value after aging. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59877 3.5.
17、1 Mechanical shock. Mechanical shock shall be determined as specified in 3.5.1.1 through 3.5.1.3. 3.5.1.1 Specimen. Three specimens, each 5 cm wide by 5 cm long and 1.25 cm thick (1.97 inches wide by 1.97 inches long and 0.49 inch thick), prepared as follows shall be tested. The specimens shall be p
18、repared by mixing the compound and pouring into molds in accordance with manufacturers instructions. Precautions shall be taken to avoid air entrapment. Specimens shall be cured in accordance with manufacturers instructions regarding time and temperature. 3.5.1.2 Apparatus. A set of steel balls vary
19、ing in size from 2.54 to 10.2 cm (1 to 4.02 inches) in diameter shall be used. The balls shall vary in size in increments of approximately 0.159 cm (0.06 inch) up to 6.35 cm (2.5 inches). Increments shall be 0.635 cm (0.25 inch) thereafter. The steel balls shall be held and released by a rigidly sup
20、ported magnetic device that shall drop the balls on the exact center of the specimen. The specimen shall be placed on a 2.54 cm (1 inch) thick steel plate of surface dimensions larger in all directions than the specimen. 3.5.1.3 Procedure. The specimen shall be placed flat on a horizontal steel plat
21、e. When dropped a vertical distance of 91 cm, the steel balls shall strike the center of the specimen. Each specimen shall be struck with steel balls starting with the smallest and proceeding towards the largest until the specimen visibly cracks. The weight of the ball which caused the crack of each
22、 specimen shall be recorded. 3.5.2 Working life. The working life, after mixing the compound thoroughly, shall be that time beyond which the insulating compound can no longer be applied satisfactorily or beyond which it no longer flows evenly and is to viscous to wet the area. 3.5.3 Operating temper
23、ature. The operating temperature of the cured insulating compound in service shall be from -32 C to 130 C (25.6 to 266 F). 3.5.4 Pot life. The pot life is the time from the initial mixing of the reactants of the insulating compound to the time when solidification commences, under conditions approxim
24、ating the conditions of use. 3.6 Prohibited materials. Components shall be free of asbestos, mercury and mercury compounds, polyvinyl chloride (PVC), cadmium, and any ozone depleting chemicals. 4. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recovered materials to the maximum
25、 extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR). 5. PRODUCT CONFORMANCE PROVISIONS. 5.1 Product conformance. The products provided shall meet the salient characteristics of this Commercial Item Description, conform to the producers own drawings, s
26、pecifications, standards, and quality assurance practices, and be the same product offered for sale in the commercial marketplace. The government reserves the right to require proof of such conformance. 5.2 Conformance testing. When specified (see 7.2), the electrical insulating compound submitted b
27、y the manufacturer as meeting the salient characteristics of this CID shall be tested by the government or a qualified commercial laboratory (see 7.2). 5.3 Material safety data sheet (MSDS). When specified (see 7.2), the manufacturer shall provide a material safety data sheet prepared in accordance
28、with FED-STD-313. 6. PACKAGING. Preservation, packing, and marking shall be as specified in the contract or order. 7. NOTES. 7.1 Source of documents. 7.1.1 ASTM. ASTM standards are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at ww
29、w.astm.org. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59877 4 7.1.2 Department of Defense specifications and standards. Department of Defense specifications and standards are available from the Standardization Document Order Desk, 700 Rob
30、bins Avenue, Building 4D, Philadelphia, PA 19111-5094 or online at https:/assist.daps.dla.mil/quicksearch/. 7.2 Ordering data. The contract or order should specify the following: a. CID document number and revision. b. Type, if there is a preference (see 2.1). c. If proof of product conformance is r
31、equired to be submitted (see 5.1). d. If the government is planning to test the product (see 5.2). e. If an MSDS is required to be submitted (see 5.3). 7.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document tak
32、es precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 7.4 Key words. Hardness Pot life Thermal shock Viscosity Volatile content Water absorption 7.5 Sources. The following are some known companies that warrant they
33、 have a product that meets the specified characteristics of this CID: Emerson & Cuming Epoxies, Etc. Specialty Polymers & Services, Inc. MILITARY INTERESTS CIVIL AGENCY COORDINATING ACTIVITY: GSA FAS Custodians: Army MI Preparing Activity: Navy SH Navy SH Air Force 85 (Project 5970-2009-007) Revi
34、ew Activities: Army CR Navy AS, CG Air Force 03, 11, 19, 99 DLA GS, GS4 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
