Low volume Hexoloy® SA sintered silicon carbide blanks are available in a range of outer and inner diameter combinations.These blanks are typically less than 25.4 mm thick, though thicker blanks are available.
High volume blanks with quantities over 500 pcs are available as dry-pressed product up to 130.18 mm outer diameter. Blanks are typically unground and sold with ‘as-fired’ tolerances.
Hexoloy® SA Properties
| Physical Properties | Units | SA |
| Composition (phases) | SiC | |
| Density | g/cm3 | 3.15 |
| 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*** @ 1,000°C | 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
These blanks are typically less than 25.4 mm thick, though thicker blanks are available. High volume blanks with quantities over 500 pcs are available as dry-pressed product up to 130.18 mm outer diameter.
