ARMY A-A-52404-1992 INSULATION SHEET CELLULAR PLASTIC THERMAL (METRIC)《公制热塑料蜂窝式隔热板》.pdf
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1、A-A-52404 Cb D 3999974 OU739L 445 METRIC A-A- 5 2 404 July 20, 1992 COMMERCIAL ITEM DESCRIPTION INSULATION SHEET, CELLULAR, PLASTIC: THERMAL (METRIC) The General Services Administration has authorized the use of this commercial item description as a replacement for MIL-I-14511CI which is canceled. 1
2、. Abstract. This commercial item description (CID) covers a unicellular, elastomeric, expanded plastic thermal insulating material whose intended use is to insulate metallic personnel compartment panels of military vehicles, as a thermal barrier for temperatures ranging from 74 degrees Celsius (OC)
3、to minus (-) 54oc. 1.1 Size. The sheet insulation sizes shall be designated by using alpha - code. 1.2 Sheet form. The sheet form shall be designated with arabic numeral 1. 2. Salient characteristics. 2.1 Materials. The insulation sheet shall be made of slab, bonded, or molded urethane foams. The us
4、e of recovered material is acceptable, provided that all requirements of this CID are met (see 5.5). 2.2 Design and construction. 2.2.1 Dimensions and tolerances. Dimensions and tolerances shall be as Specified by the contracting activity. 2.2.2 Color. Unless otherwise specified, the color of the in
5、sulating material shall be green 383, color chip no. 34094 per FED-STD-595. Beneficial comments, recommendations, additions, deletions clarif ications, etc. 1 and any other data which may improve this document should be sent by letter to: U.S. Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, M
6、I 48397-5000. I I MSC 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 IHS-,-,-A-A-52404 5b - 9999974 0087392 381 A-A-52404 2.3 Performance. 2.3.1 Compression set.
7、The resilience capability of the insulation material shall be 35 to 50 percent (%) when tested in accordance with method B of ASTM D395. 2.3.2 Volume change on heat aging. The volume change on heat aging insulation material shall be not more than 8% when tested in accordance with method 7221 of FED-
8、STD-601. 2.3.3 “K“ Factor. The heat transfer coefficient of insulation material shall be no more than 0.043 watt per meter Kelvin W/(mK) at 74OC and minus 54oc * 2.3.4 Density. The density of insulation material shall be not more than 120.138 kilogram per cubic meter ( kg/m3). 2.3.5 Tensile strength
9、. The tensile strength of the insulation material shall be not less than 344.737 kilopascal (kPa) when tested in accordance with ASTM D412 or ASTM D3574. 2.3.6 Elongation. The elongation of the insulation material shall be not less than 200%. The elongation shall be measured and recorded during tens
10、ile strength testing (see 2.4.5). 2.3.7 Water absorption. The water absorption of the insulation material shall be not more than 4% by weight when tested in accordance with method 12411 of FED-STD-601. 2.3.8 Flame resistance. The insulation shall be self-extinguishing. This shall be verified by appl
11、ying a candle flame to the lower or free end of a clamped specimen for 15 seconds. The candle shall then be removed. If the flame ceases within 5 seconds, the insulation material shall be considered self- extinguishing. 2.3.9 Brittleness. The insulation material shall withstand a 180 degree bend ove
12、r an 8 mm diameter rod in 15 seconds at a temperature of minus 54 - + 3OC without cracking. 2.3.10 Dimensional change. The change in the linear or transverse dimensions shall be not more than 1.5%. 2.3.11 Coherency with adhesive cemented joint. The tensile strength of the cemented joint shall not be
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