Silicon Nitride Rod
We provide silicon nitride welding rod, pin and regularly used rods.
Silicon Nitride Rods – The Ultimate High-Performance Engineering Ceramic Solution
Unmatched Material Properties for Demanding Applications
At Edgetech, we manufacture premium silicon nitride rods (Si3N4 Silicon Nitride ceramic rods) that combine exceptional mechanical properties with outstanding thermal performance. Our advanced ceramic rods are engineered to outperform metals and other ceramics in the most challenging environments.
Key Advantages of Our Silicon Nitride Rods:
✔ Exceptional Strength-to-Weight Ratio – High strength with low density
✔ Superior Thermal Stability – Maintains properties from cryogenic to 1200°C
✔ Excellent Wear Resistance – Outlasts steel components 10X longer
✔ Chemical Inertness – Resists acids, alkalis, and molten metals
✔ Thermal Shock Resistance – Withstands rapid temperature changes
Performance of silicon nitride ceramic material
| item | Unit | Si3N4 |
| Physical Property | ||
| Color | \ | Gray Black |
| Density | g/cm3 | >3.2 |
| Mechanical properties | ||
| Rockwell hardness | HRA90 | |
| Vickers hardness (Hv50) | HV0.5 | >1550 |
| Elastic modulus (20℃) | Gpa | 290 |
| Bending strength(20℃) | Mpa | >600 |
| Compressive strength (20℃) | Mpa | 2500 |
| Fracture toughness (20℃) | Mpam1/2 | >6.0 |
| Thermal properties | ||
| Thermal conductivity | W/(m·K) | 15-20 |
| Coefficient of thermal expansion（20℃-1000℃） | 10-6K-1 | >3.1 |
| Thermal shock stability | △T℃ | 500 |
| Specific heat capacity | KJ/kg.K | 700 |
| Maximum operating temperature（in air） | ℃ | 1200 |
| Electrical properties | ||
| Dielectric strength (insulation strength) | KV/mm | 1 |
| Volume resistance (20℃) | Ω.cm | 10^12 |
* Tests under room temperature environment;
* The above information is offered for comparison only. Exact properties will vary depending on the manufacturing method.
Manufacturing Excellence:
We produce silicon nitride rods using multiple advanced methods:
GPSN (Gas Pressure Sintered) – Our standard production method
SRBSN (Sintered Reaction-Bonded)
HPSN (Hot Pressed) – For maximum density
HIP-SN (Hot Isostatically Pressed) – Premium grade
RBSN (Reaction-Bonded)
Industrial Applications of Silicon Nitride Rods:
Automotive & Aerospace:
Turbocharger rotors
Engine valves
Bearing components
Industrial Manufacturing:
Welding rollers and fixtures
Tube forming tools
Centering pins
Drawing dies
Specialty Applications:
Semiconductor handling
High-temperature sensors
Chemical processing
Custom Solutions Available:
Gas Pressure Sintered Silicon Nitride
Diameters from 3mm to 50mm
Custom lengths up to 500mm
Precision ground surfaces
Special end configurations
Secure Packaging:
We protect every silicon nitride rod with:
Shock-absorbing foam inserts
Moisture-resistant barrier packaging
Vacuum sealing for critical components
Custom crating for bulk orders
Why Choose Edgetech Silicon Nitride Rods?
ISO 9001 certified production
Full material traceability
Technical support from ceramics engineers
Competitive lead times
Additional Services:
Small-batch prototyping
Precision machining (±0.01mm tolerance)
Complete material testing
Custom ceramic solutions
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