Silicon Carbide vs ZrB2
Ceramic · grade comparison
Silicon Carbide and ZrB2 are both ceramic grades. ZrB2 is the stronger of the two: tensile strength 280 MPa (40.6 ksi) against 250 MPa (36.3 ksi) for Silicon Carbide, about 12% more. Silicon Carbide is harder — 2,500 HV against 2,200 HV for ZrB2 — which matters for wear surfaces and threads. Silicon Carbide is lighter (3.15 g/cm³ vs 6.09 g/cm³ for ZrB2) and ZrB2 is stiffer (489 GPa vs 410 GPa).
Silicon CarbideChoose it when surface hardness matters, or when weight is the constraint.
ZrB2Choose it when strength drives the design.
Silicon Carbide vs ZrB2: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Compressive Strength
Flexural Strength
Hardness, Vickers
Hardness, Knoop
Hardness, Mohs
Same in both: Fracture Toughness (K_IC) 3.5 MPa·√m3.2 ksi·√in
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Refractive Index
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)
Same in both: Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
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
Thermal Shock Resistance Index
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 | Silicon Carbide | ZrB2 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Silicon Carbide vs ZrB2 — frequently asked
Is ZrB2 stronger than Silicon Carbide?
Yes. ZrB2 has a typical tensile strength of 280 MPa (40.6 ksi) against 250 MPa (36.3 ksi) for Silicon Carbide — about 12% more.
Which is cheaper, Silicon Carbide or ZrB2?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Silicon Carbide or ZrB2?
ZrB2, by a small margin. Both rate not recommended for machinability — 8/100 against 3/100 for Silicon Carbide.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Silicon Carbide and ZrB2 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.