Saint-Gobain Performance Ceramics & Refractories’ utilize materials expertise, innovative designs, creative engineering and precision manufacturing...
Hexoloy® Seal Tubes
Hexoloy® SA sintered silicon carbide seal tubes are available in a wide range of OD and ID combinations. Typical length of the seal tube is 12”, trough 6” tube is also available. Seal tubes are unground and sold with “as-fired” tolerances.
Features and Benefits
- Exceptional hardness
- Chemically inert to a broad range of chemicals
- Seal faces for mechanical seals used in industrial pumps
| Physical Properties | Units | SE |
| Composition (phases) | SiC | |
| Density | g/cm3 | 3.10 |
| Grain Size | Qm | 4-10 |
| Hardness (Knoop)** | kg/mm2 | 2800 |
| Flexural Strength 4pt. @ RT*** |
MPa x103 lb/in2 |
380 55 |
| Flexural Strength 3pt. @ RT*** |
MPa x103 lb/in2 |
550 80 |
| Compressive Strength @ RT | MPa x103 lb/in |
3900 560 |
| Modulus of Elasticity @ RT | GPa x106 lb/in |
430 62 |
| Weibull Modulus (2 parameters) | 10 | |
| Poisson Ratio | 0.14 | |
| Fracture Toughness @ RT Double Torsion & SENB |
MPa x m½ 103lb/in2 x in½ |
4.60 4.20 |
| Coefficient of Thermal Expansion RT to 700°C |
x10-6mm/mm°K x10-6in/in°F |
4.02 2.20 |
| Max. Service Temp (air) | °C °F |
1900 3450 |
| Mean Specific Heat @ RT | J/gm°K | 0.67 |
| Thermal Conductivity @ RT | W/m°K Btu/ft h°F |
125.6 72.6 |
| @ 200°C | W/m°K Btu/ft h°F |
102.6 59.3 |
| @ 400°C | W/m°K Btu/ft h°F |
77.5 44.8 |
| Permeability RT to 1000°C | All impervious to gases over 31 MPa | |
|
Electrical Resistivity @ RT*** |
ohm-cm | 102-108 0.01-0.2 |
| Emissivity | 0.9 |
* Composition code: Si = free silicon metal; C = free graphite; SiC = silicon carbide
* Knoop 100-gm load
*** Test Bar Size: 3 x 4 x 45 mm (0.118" x 0.157" x 1.772")
*** Dependent upon dopants in Hexoloy® SA SiC which will decrease electrical resistivity
Typical length of the seal tube is 12”, through 6” tube is also available.
