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| Composition | | Inorganic. Soda lime glass. |
Density, minimum pcf (kg/m3) | ASTM C303 | 5.0 (80) |
| Service Temperature, ºF (ºC) | | -445 to 806 (-265 to 430) |
| Water Absorption, maximum vol % | ASTM C240 | 0.1% |
| Water Vapor Permeability, maximum perm-in (ng/Pa-s-m) | ASTM E96 | 0.005 (.007) |
| Mold/Mildew Resistance | ASTM C1338 | |
| Corrosion Resistance | ASTM C1617 | Pass (steel, less than DI water) |
Hydrostatic Resistance, minimum equivalent water height in feet (meters)
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Coefficient of Linear Thermal Expansion, maximum in/in/ºF (mm/mm/ºC) | | |
Dimensional Stability1, %, maximum @ 158°F / 97% R.H. @ -40°F / ambient R.H. @ 200°F / ambient R.H. | | |
| Compressive Strength (capped), minimum psi (kPa) | ASTM C165 Procedure A / ASTM C240 | 72 (500) |
| Flexural Strength, psi (kPa), minimum | ASTM C203 | 58 (400) |
Modulus of Elasticity, ksi (MPa), Approximate (ν = 0.25) Perpendicular Parallel | | |
| ASTM E136 | Non-combustible |
Surface Burning Characteristics, 1,5 maximum Flame Spread Index Smoke Developed Index | | Unfaced 0, Faced NR3 Unfaced 0, Faced NR3
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Thermal Resistance6 per inch @ 75ºF (24ºC) mean temperature2, Hr-ft2-ºF/BTU (m2-ºC/W) | | 3.8 (0.67) |