8Y-FSZ vs ATZ
Ceramic · grade comparison
8Y-FSZ and ATZ are both ceramic grades. ATZ is the stronger of the two: tensile strength 400 MPa (58 ksi) against 150 MPa (21.8 ksi) for 8Y-FSZ, about 167% more. ATZ is harder — 1,400 HV against 1,300 HV for 8Y-FSZ — which matters for wear surfaces and threads. ATZ is lighter (5.5 g/cm³ vs 5.95 g/cm³ for 8Y-FSZ) and ATZ is stiffer (240 GPa vs 200 GPa).
8Y-FSZChoose it when the part sees heat.
ATZChoose it when strength drives the design, or when surface hardness matters.
8Y-FSZ vs ATZ: 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
Shear Strength
Same in both: Elongation at Break 0%
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Refractive Index
Porosity
Light Transmission
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
Same in both: Typical Recycled Content 0%
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 | 8Y-FSZ | ATZ |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
8Y-FSZ vs ATZ — frequently asked
Is ATZ stronger than 8Y-FSZ?
Yes. ATZ has a typical tensile strength of 400 MPa (58 ksi) against 150 MPa (21.8 ksi) for 8Y-FSZ — about 167% more.
Which is cheaper, 8Y-FSZ or ATZ?
Both sit in the same relative cost tier ($$$$, 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 ATZ?
Pick 8Y-FSZ when the part sees heat. Pick ATZ when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 8Y-FSZ and ATZ 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.