8Y-FSZ vs Steatite
Ceramic · grade comparison
8Y-FSZ and Steatite are both ceramic grades. 8Y-FSZ is the stronger of the two: tensile strength 150 MPa (21.8 ksi) against 60 MPa (8.7 ksi) for Steatite, about 150% more. 8Y-FSZ is harder — 1,300 HV against 650 HV for Steatite — which matters for wear surfaces and threads. Steatite is lighter (2.8 g/cm³ vs 5.95 g/cm³ for 8Y-FSZ) and 8Y-FSZ is stiffer (200 GPa vs 100 GPa).
8Y-FSZChoose it when strength drives the design, or when surface hardness matters.
SteatiteChoose it when weight is the constraint.
8Y-FSZ vs Steatite: 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
Fracture Toughness (K_IC)
Hardness, Vickers
Hardness, Knoop
Hardness, Mohs
Same in both: Elongation at Break 0%
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
Dielectric Constant (1 MHz)
Volume Resistivity
Dielectric Strength
Dissipation Factor (1 MHz)
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 | 8Y-FSZ | Steatite |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
8Y-FSZ vs Steatite — frequently asked
Is 8Y-FSZ stronger than Steatite?
Yes. 8Y-FSZ has a typical tensile strength of 150 MPa (21.8 ksi) against 60 MPa (8.7 ksi) for Steatite — about 150% more.
Which is cheaper, 8Y-FSZ or Steatite?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose 8Y-FSZ over Steatite?
Pick 8Y-FSZ when strength drives the design, or when surface hardness matters. Pick Steatite when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 8Y-FSZ and Steatite 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.