BASIC CHARACTERISTICS | CHEMICAL COMPOSITION | ALUMINUM WITH OVER 97% PURITY |
STRUCTURE | CLOSED – CELL | |
SPECIFIC GRAVITY | 0.2 ~ 0.4 | |
ACCOUSTIC CHARACTERISTICS | NOISE REDUCTION COEFFICIENT | NRC 0.70~0.75 |
ABSORPTION COEFFICIENT | 500 Hz → 34.5 dB 1,000 Hz → 41.6 dB | |
MECHANICAL CHARACTERISTICS | COMPRESSIVE STRENGTH | 1.4 ~ 1.8 Mpa |
TENSILE STRENGHTH | 1.3 ~ 1.9 Mpa | |
TERMAL CHARACTERSICS | THERMAL CONDUCTIVITY | 0.268 W/m.K |
MELTING POINT | ABOUT 780 ℃ | |
OTHER CHARACTERISTICS | ELECTROMAGNETIC SHIELDING | OVER 90 dB |
SALT WATER TEST | PASSED |