3R4000
This refractory vacuum formed board is rigid and self-supporting and is composed from a mixture of ceramic fibers and binders. It offers low thermal conductivity, excellent strength and thermal stability at elevated temperatures. It resists to chemical attacks, in exception to hydrofluoric acid, phosphoric acid and strong alkali.
The 3R4000 is an inexpensive product, designed to meet a wide variety of applications. It is available in several thicknesses and can be manufactured in different sizes to meet specific needs.
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Applications
This board can be used as : appliance and heat processing insulation, crucible and molten metal tray insulation, dynamic covers for places with high mechanical tension, furnaces, industrial furnaces, hot surface covers, for trough casting molten aluminum insulation, shields, etc.
Specifications
Technical data
| Color | Beige |
|---|---|
| Temperature | Continuous: 1093°C (2000°) |
| Classification temperature | 1204°C (2200°) |
| Density, kg/m³ (pcf) | 288-320 (18-20) |
| Modulus of rupture MOR, MPa (psi) *unfired | 0.69-0.90 (100-130) |
| Compressive strength @ 5% deformation, MPa (psi) | 0.14-0.21 (20-30) |
| Compressive strength @ 10% deformation, MPa (psi) | 0.21-0.28 (30-40) |
| Permanent linear shrinkage, %, 24 hours | |
| 815°C (1500°F) | 1.2 |
| 982°C (1800°F) | 2.2 |
| 1093°C (2000°F) | 2.8 |
| 1204°C (2200°F) | 3.4 |
| Thermal conductivity, W/m·K (BTU·in/hr·ft²), ASTM C201 | |
| 260°C (500°F) | 0.072 (0.5) |
| 538°C (1000°F) | 0.101 (0.7) |
| 816°C (1500°F) | 0.144 (1) |
| 1093°C (2000°F) | 0.216 (1.5) |
| Composition | SiO2: 56, Al2O3: 42%, Loss of ignition: 4-7% |
