Description
Silicon nitride bearing balls combine high strength, wear resistance, corrosion resistance, high-temperature capability, electrical insulation and non-magnetic behaviour — properties metals cannot match. They are chemically stable: apart from hydrofluoric acid they do not react with other inorganic acids, they are oxidation-resistant, they are not wetted by most non-ferrous melts (especially molten aluminium), and they withstand intense radiation exposure. Ball dimensions can be customised to customer requirements.
Key features
- Chemically stable — resists all inorganic acids except HF
- Not wetted by molten non-ferrous metals, especially aluminium
- Withstands intense radiation
- Electrically insulating, non-magnetic
Applications
Chemical processing equipment and pumps.
Typical material properties
| Property | Value |
|---|---|
| Density | 3.2 ± 0.05 g/cm³ |
| Relative density | > 99.5 % |
| Elastic modulus | 40 – 310 GPa |
| Crush load ratio | ≥ 40 % |
| Hardness (HV) | ≥ 14.2 GPa |
| Fracture toughness | 6.0 – 7.0 MPa·m¹ᐟ² |
| Flexural strength (3-point) | ≥ 820 MPa |
| Poisson's ratio | 0.25 |
| Coefficient of thermal expansion | 3.0 – 3.2 ×10⁻⁶/K |
| Weibull modulus | 10 – 12 |
| Thermal conductivity | 15 – 20 W/(m·K) |
| Electrical resistivity | 10¹⁴ Ω·cm |
| Acid / alkali corrosion resistance | Excellent |
| Dimensional stability | Excellent |
| Magnetism | None |
Typical values — contact us for the latest certificate of analysis.
