ARMY A-A-52449-1993 INSULATION PANEL VIBRATION-DAMPENING AND THERMAL-BARRIER《振动抑制及热障板绝缘材料》.pdf

《ARMY A-A-52449-1993 INSULATION PANEL VIBRATION-DAMPENING AND THERMAL-BARRIER《振动抑制及热障板绝缘材料》.pdf》由会员分享，可在线阅读，更多相关《ARMY A-A-52449-1993 INSULATION PANEL VIBRATION-DAMPENING AND THERMAL-BARRIER《振动抑制及热障板绝缘材料》.pdf（5页珍藏版）》请在麦多课文档分享上搜索。

1、A-A- 5 2 44 9 November 18, 1993 SUPERSEDING MiL-I-62523(AT) 22 July 1987 0 COMMERCIAL ITEM DESCRIPTION INSULATION, PANEL, VIBRATION-DAMPENING AND THERMAL-BARRIER The General Services Administration has authorized the use of this commercial item description (CID) as a replacement for MIL-I-62523(AT),

2、 which is canceled. ABSTRACT This CID covers requirements for insulation with vibration-dampening and thermal-barrier properties for use on panels in military vehicles. SALIENT CHARACTERISTICS a. Materials. The materials shall be as specified herein and in applicable drawings. The materials shall be

3、 free of defects and imperfections that might affect the serviceability and reliability of the finished product. The insulation shall have excellent resistance to petroleum, fuel, and alkalis, and shall have a specific gravity of 1.75 + 10 percent. adverse effects on the health of the personnel. The

4、 use of recovered materials made in compliance with regulatory requirements is acceptable providing that all requirements of this CID are met (see note d). b. Design and construction. The design and construction of the insulation shall be such as to meet the requirements herein. Configuration, thick

5、ness, and weiqht of the insulation shall be as specified in the applicable drawing (see note b). The insulation shall not contain any materials which would cause I l Beneficial comments, recommendations, additions, deletions clarifications, etc. I and any other data which may improve this document s

6、hould be sent by letter to:! I U.S. Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000. I AMSC N/A FSC 5640 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH

7、S-,-,-A-A-52449 9999374 0161531 441 rn A-A-52449 c. Thermal conductivity. The thermal conductivity of the insulation shall not be greater then .3 watts per meter kelvin. d. Indentation hardness. The indentatin hardness of the insulation when using a type A durometer per ASTM D2240 shall be 85 - + 10

8、 percent. e. Tear resistance. The tear resistance of the insulation shall be not less than 5250 Newtons per meter. of the insulation shall be determined as per ASTM E756 and shall not be less than as shown in figures 1 through 3. f. Vibration-dampening properties. The vibration dampening properties

9、g. Tensile strength. The tensile strength Of the insulation shall be h. Flammability. The insulation shall be self-extinguishing with no i. Water absorption. The insulation shall have no more than a 0.1 not less than 1.03 megapascal. burn rate. percent weight gain when immersed in water for 24 hours

10、, followed by 38 hours of drying. 1- Color. The color of the insulation shall be the manufacturers dark grey, which provides the closest match to color chip number 36081 of FED-STD-595. k. Identification markings. Identification markings shall be permanent and legible and shall include, as a minimum

11、, the manufacturers identification code (CAGE), the contract number, and the Engineering drawing part number (see note b). QUALITY ASSURANCE PROVISIONS a. Responsibility for inspection. The contractor is responsible for the performance of all inspections (examinations and tests). b. Contractor certi

12、fication. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this commercial item description and that the product conforms to the producers own drawings, specifications, workmanship standards, and quality assurance practic

13、es. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to require proof of such conformance prior to the first delivery.and thereafter as may be otherwise provided for under the provisions of the contract. PRESERVATION, PACKAGING, PACKING, LA

14、BELING, AND MARKING Preservation, packaging, packing, labeling, and marking for the desired level shall be as specified in the contract (see note b). 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.6 .4 .3 .2 .1 . O8 .O6 .O4 .O3 .o2 . o1 O .6 .4 .

15、3 .2 p: O c U U LL vi vi .1 2 .O8 a g .O6 m 5 .O4 I u .O3 .o2 . o1 A-A-52Y49 Eil 9999774 0363532 388 A-A- 5 2 44 9 FIGURE 1. Loss factor versus thickness ratio. 40 -THICKNESS RATIO OF INSULATION TO METAL IS 2:l. ! ! 1 ! ! ! I FREQUENCY (HERTZ) FIGURE 2. Loss factor versus frequency. 3 Provided by IH

16、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5 2 44 9 9999974 OLb1533 214 .30 .25 .20 O U LL VI v) g .15 5 .10 .O5 O A-A-52 44,9 THICKNESS RATIO OF INSULATION TO STEEL IS 2:1. FREQUENCY = 200 HERTZ. 40 50 60 70 80 90 100 110 120 130 TEMPERATURE (OF) FIGURE

17、3. Loss factor versus temperature. NOTES (This section contains information of a general or explanatory nature a. Addresses for obtainina coDies of referenced documents. that may be helpful but i8 not mandatory.) 1. Government specifications and standards. Copies of FED-STD-595 “Colors Used in Gover

18、nment Procurement“ are available from the Navy Publications and Printing Service Office, Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. Method for Measuring Vibration-Damping Properties of Materials“ and ASTM D2240-91 “Standard Test Method for Rubber

19、 Property-Durometer Hardness“ are available from the American Society for Testing and Materials, 1976 Race Street, Philadelphia, PA 19103-1187. b. Ordering data. Acquisition documents must specify the following: 2. Non-Government publications. Copies of ASTM E756 “Standard Test 1. Title, number, and

20、 date of this commercial item description. 2. Issue of DODISS and industrial standards to be cited in the solicitation and, if required, the specific issue of individual documents referenced. 3. Title, number, and date of applicable drawing. 4. Engineering drawing part number. 5. Selection of applic

21、able level and packaging requirements. c. Cross-reference and supersession data. Insulation conforming to this CID are interchangeable/substitutable with insulation conforming to MIL-I-62523(AT) which is superseded by this CID. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted w

22、ithout license from IHS-,-,-A-A-52449 II 9979974 OLbL534 150 II A-A- 5 2 449 d. Regulatory requirements. Recovered material is material made in conformance to section 402 of the Clean Air Act (33 U.S.C. 1342 et. seq.). MILITARY INTERESTS: Custodian 8 Army - AT 4 CIVIL AGENCY COORDINATING ACTIVITIES: GSA - FSS PREPARING ACTIVITY: Army - AT (Project 5640-0563) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-