Cordierite vs Electrical Porcelain
Ceramic · grade comparison
Cordierite and Electrical Porcelain are both ceramic grades. Electrical Porcelain is the stronger of the two: tensile strength 30 MPa (4.35 ksi) against 25 MPa (3.63 ksi) for Cordierite, about 20% more. Cordierite is harder — 700 HV against 620 HV for Electrical Porcelain — which matters for wear surfaces and threads. Cordierite runs hotter in service (1,250°C vs 1,000°C continuous) and Cordierite conducts heat better (2.5 W/m·K vs 1.2 W/m·K). On the shop floor, Cordierite machines more easily (poor vs not recommended) and Electrical Porcelain sits in a lower cost tier (standard, $$) than Cordierite (high, $$$$).
CordieriteChoose it when surface hardness matters, or when the part sees heat.
Electrical PorcelainChoose it when strength drives the design, or when cost is the deciding factor.
Cordierite vs Electrical Porcelain: 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.
CordieriteElectrical Porcelain
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Compressive Strength
Flexural Strength
Fracture Toughness (K_IC)
Hardness, Vickers
Hardness, Mohs
Elongation at Break
Hardness, Knoop
Same in both: Elastic (Young's) Modulus 70 GPa10.2 Msi · Shear Modulus 28 GPa4.1 Msi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Porosity
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Same in both: Electrical Resistivity 1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in · Volume Resistivity 1×10¹³ 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
Sintering / Firing Temperature
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 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.
Manufacturing and finishing
| Capability | Cordierite | Electrical Porcelain |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Cordierite vs Electrical Porcelain — frequently asked
Is Electrical Porcelain stronger than Cordierite?
Yes. Electrical Porcelain has a typical tensile strength of 30 MPa (4.35 ksi) against 25 MPa (3.63 ksi) for Cordierite — about 20% more.
Which is cheaper, Cordierite or Electrical Porcelain?
Electrical Porcelain is the lower-cost material: it sits in the standard tier ($$) while Cordierite is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Cordierite or Electrical Porcelain?
Cordierite. Its machinability rates poor (20/100) against not recommended (8/100) for Electrical Porcelain.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cordierite and Electrical Porcelain 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.