Silicon Nitride HIPed vs Silicon Nitride Sintered
Ceramic · Silicon Nitride temper comparison
Silicon Nitride HIPed and Silicon Nitride Sintered are two conditions of the same ceramic grade, Silicon Nitride: HIPed (hot isostatic pressed) versus Sintered. The chemistry is identical, so every difference below comes from the condition. Silicon Nitride HIPed is the stronger of the two: tensile strength 550 MPa (79.8 ksi) against 450 MPa (65.3 ksi) for Silicon Nitride Sintered, about 22% more. Silicon Nitride HIPed is harder — 1,600 HV against 1,500 HV for Silicon Nitride Sintered — which matters for wear surfaces and threads. Silicon Nitride HIPed conducts heat better (30 W/m·K vs 25 W/m·K).
Silicon Nitride HIPedChoose it when strength drives the design, or when surface hardness matters.
Silicon Nitride HIPed vs Silicon Nitride Sintered: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all ceramic grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all ceramic grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Silicon Nitride HIPedSilicon Nitride Sintered
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Compressive Strength
Flexural Strength
Fracture Toughness (K_IC)
Hardness, Vickers
Same in both: Shear Modulus 122 GPa17.7 Msi · Bulk Modulus 222 GPa32.2 Msi · Poisson's Ratio 0.27 · Elongation at Break 0% · Hardness, Knoop 1,500 HK · Hardness, Mohs 9
Physical
Density and transition temperatures.
Density
Porosity
Same in both: Melting Point (Solidus) 1,900°C3,452 °F · Light Transmission 0%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 700 J/kg·K0.17 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 3.2 µm/m·K1.8 µin/in·°F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 15 kV/mm381 V/mil · Dielectric Constant (1 MHz) 8 · Dissipation Factor (1 MHz) 0.001 · Volume Resistivity 1×10¹⁴ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Polishability
Same in both: Sintering / Firing Temperature 1,750°C3,182 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 170 MJ/kg73,087 BTU/lb · Embodied Carbon (primary production) 12 kg CO₂/kg · Embodied Water 220 L/kg26.4 gal/lb · Typical Recycled Content 0%
Strength versus weight
Yield strength against density for every ceramic grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Silicon Nitride HIPed vs Silicon Nitride Sintered — frequently asked
Is Silicon Nitride HIPed stronger than Silicon Nitride Sintered?
Yes. Silicon Nitride HIPed has a typical tensile strength of 550 MPa (79.8 ksi) against 450 MPa (65.3 ksi) for Silicon Nitride Sintered — about 22% more.
Which condition does FabDigit quote by default, HIPed or Sintered?
Sintered is the default Silicon Nitride condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose Silicon Nitride HIPed over Silicon Nitride Sintered?
Pick Silicon Nitride HIPed when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Silicon Nitride HIPed and Silicon Nitride Sintered side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.