TECHNICAL DATA
Typical Silicon Carbide (SiC) Properties
SiC is an artificial (man-made) mineral known for its very high hardness and abrasion resistance. Common applications include pump seals, valve components, and wear-intensive applications such as rollers and paper industry retainers.
| Properties | Units | Test | Value |
|---|---|---|---|
| Physical | |||
| Chemical Formula | – | – | a-SiC |
| Density, r | g/cm3 | ASTM C20 | 3.21 |
| Color | – | – | dark gray |
| Crystal Structure | – | – | hexagonal |
| Water Absorption | % @R.T. | ASTM C373 | 0.0 |
| Hardness | Moh’s | – | 9 – 10 |
| Hardness | knoop (kg/mm2) | Knoop 100g | 2800 |
| Mechanical | |||
| Compressive Strength | MPa @ R.T. | ASTM C773 | 1725 – 2500 |
| Tensile Strength | MPa @ R.T. | ACMA Test #4 | 310 |
| Modulus of Elasticity (Young’s Mod.) | GPa | ASTM C848 | 476 |
| Flexural Strength (MOR) | MPa @ R.T. | ASTM F417 | 324 |
| Poisson’s Ratio, u | ASTM C818 | 0.19 | |
| Fracture Toughness, KIc | MPa x m1/2 | Notched Beam Test | 4.0 |
| Thermal | |||
| Max. Use Temperature (* denotes inert atm.) | ºC | No load cond. | 1400 |
| Thermal Shock Resistance | DT (ºC) | Quenching | 350 – 500 |
| Thermal Conductivity | W/m-K @ R.T. | ASTM C408 | 41 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | ASTM C372 | 5.12 |
| Specific Heat, cp | cal/g-ºC @ R.T. | ASTM C351 | 0.15 |
| Electrical | |||
| Dielectric Constant | 1MHz @ R.T. | ASTM D150 | 10.2 |
| Dielectric Strength | kV/mm | ASTM D116 | – |
| Electrical Resistivity | Wcm @ R.T. | ASTM D1829 | 108 |