Nitride bonded silicon carbide (NB SiC) tubes offer an economical choice for thermocouple sensor OEMs.
These tubes can be produced to a large range of outer and inner diameters with several options for mounting. NB SiC does not contaminate non-ferrous melts, like cast iron tubes. It is also a popular choice in solutions for temperature measurement in heat treating furnaces.
N-Durance®
| Properties | Unit | Spec. | Typical Values |
| Bulk Density | g/cc | >2.75 | 2.80 |
| Apparent Porosity | % | <12 | 8 |
| Surface Porosity | % | <1 | 0.5 |
| Cold Modulus of Rupture (at room temperature) | MPa | >150 | 160 |
| Hot Modulus of Rupture (at 1,400°C) | MPa | >140 | 180 |
| Modulus of Elasticity | GPa | 240 | |
| Thermal Conductivity (at 1,000°C) | W/m.K | 20 | |
| Co-efficient of Thermal Expansion | °C | 4.4x10-6 | |
| Maximum Service Temperature | °C | 1,450 |
Refrax® 20E
| Properties | Unit | Typical Values |
| Bulk Density | g.cm-3 | 2.20 |
| Apparent Porosity | % | 28 |
| Modulus of Rapture ar 20°C | N.mm-2 | 25 |
| Thermal Conductivity at 1,000°C | W/m-1.K-1 | 18.5 |
| Abrasion Resistance - BS1902 | cm-3 | 80 |
Cryston® 789A
| Properties | Unit | Typical Values |
| Bulk Density | g.cm-3 | >26.2 |
| Apparent Porosity | % | <16 |
| Modulus of Rapture at 20°C | N.mm-2 | >165 |
| Thermal Conductivity at 1,000°C | W/m-1.K-1 | 15.5 |
| Abrasion Resistance - BS1902 | 10-6/°C | 5.1 |
STANDARD DIMENSIONS OF NBSiC TUBES*
* Technical data, right of modification reserved
| OD | ID | Length | |
| N-Durance® | 20 - 50 mm | 8 - 26 mm | Up to 1100 mm |
| Refrax® 20E | 20 - 90 mm | Wall 4 - 10 mm | Up to 1600 mm |
| Cryston® 789A | 25 - 40 mm | 12 - 27 mm | Up to 1500 mm |
