Silicon Nitride Positioning and Welding Pins
Silicon Nitride Ceramic Component
SKU: FWM/SN-PIN-001
- Material
- Silicon Nitride (Si₃N₄) – High-density / Gas Pressure Sintered
- Size
- Guide diameter and tip profile matched to the weld nut or stud
- MOQ
- 5 pieces per type
- Applications
- Automotive
Wear-resistant, electrically insulating pins locate weld nuts and studs in resistance-welding fixtures.
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Product Description
Silicon nitride positioning pins locate weld nuts, studs and workpieces in projection-welding and resistance-welding fixtures.
The guide diameter, tip and shoulder establish the workpiece position before welding. The ceramic's electrical insulation helps limit unwanted current through the locating pin, while hardness and wear resistance help preserve its locating surface.
Thermal shock resistance and low adhesion are useful around repeated weld cycles and spatter exposure.
Product Features
- Electrical insulation to limit unwanted current through the pin
- Low adhesion to help reduce weld buildup
- Hard, wear-resistant locating surfaces
- Fracture toughness for repeated fixture contact
- Thermal shock resistance around welding cycles
Typical Applications
- Projection welding of nuts to sheet metal
- Resistance-welding fixtures and automated nut-welding stations
- Locating weld nuts, studs and small metal components
- Repeated positioning in automotive and general metal assembly
95% Si₃N₄ Typical Properties
| Property | 95% Si₃N₄ | Condition / method |
|---|---|---|
| Density (g/cm³) | ≥3.2 | — |
| Young’s modulus (GPa) | 300 | — |
| Fracture toughness (MPa·m½) | 6.2 | — |
| Flexural strength (MPa) | >720 | 25°C |
| Compressive strength (MPa) | 2200 | 25°C |
| Thermal conductivity (W/(m·K)) | 15–20 | 25°C |
| Coefficient of thermal expansion (10⁻⁶/K) | 3.0–3.2 | 25–1000°C |
| Volume resistivity (Ω·cm) | >10¹⁴ | 25°C |
| Typical maximum material temperature (°C) | 1200 | — |
| Poisson’s ratio | 0.26 | — |
| Dielectric strength (kV/mm) | 16 | — |
| Relative permittivity | 8.2 | 1 MHz; 25°C |
| Dielectric loss tangent | 0.004 | 1 GHz; 25°C |
Available Forms
Pins locate weld nuts or studs. The mating size, guide diameter, head profile and mounting geometry define the required pin; a weld-nut designation is not a thread on the ceramic pin.
- Round head and pointed head designs
- Locating profiles matched to the specified weld nut or stud
- Custom guide diameter, shoulder geometry, nose profile and mounting length
Packaging & Shipping
Packing and shipment arrangements are selected for the confirmed component geometry and order requirements.
| Item | Details |
|---|---|
| Packaging & shipping | Individually protected, cushioned and packed in export cartons. Other commercial terms are confirmed in the quotation. |
| Payment terms | T/T / Western Union / PayPal; 50% advance payment, 50% balance before shipment |
| Shipping methods | Sea freight / Air freight / Door-to-door courier |
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