Materials / Compare
Ceramic Alumina 96% vs. Plastic PETG
Compare Ceramic Alumina 96% vs. Plastic PETG strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | 46.2MPasourcetypical |
| Ultimate tensile strength | 221MPasourcetypical tensile strength, 25 °C (ACMA Test #4) | 46.2MPasourcetypical, peak stress (= stress at yield) |
| Compressive strength | 2,068MPasourcetypical, 20 °C (ASTM-C773) | not sourced |
| Flexural strength | 358MPasourceflexural strength (MOR), 20 °C (ASTM-F417) | 78.9MPasourcetypical |
| Elongation at break | not sourced | 7.6%sourcetypical |
| Young's modulus (stiffness) | 303GPasourcetypical, 20 °C (ASTM-C848) | 1.94GPasourcetypical |
| Density | 3,720kg/m³sourcetypical (ASTM-C20) | 1,270kg/m³sourcetypical |
| Strength to weight | 59.4kN·m/kg1.63x higher | 36.4kN·m/kg |
| Stiffness to weight | 81.5MN·m/kg53.3x higher | 1.53MN·m/kg |
| Poisson's ratio | 0.21sourcetypical, 20 °C (ASTM-C848) | not sourced |
| Shear modulus | 125GPa | not sourced |
| Bulk modulus | 174GPa | not sourced |
| Speed of sound | 9,025m/s | 1,236m/s |
| Thermal | ||
| Thermal conductivity | 24.7W/m·Ksourcetypical, 20 °C (ASTM-C408) | 0.21W/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| Thermal expansion | 8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372) | 51µm/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical |
| 100 mm part over a 50 °C swing | 41µm growth6.22x less | 255µm growth |
| Specific heat | 880J/kg·Ksourcetypical, 100 °C (ASTM-E1269) | 1,300J/kg·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), DSC at 60 °C (lowest temperature listed) |
| Heats up and cools (diffusivity) | 7.55mm²/s59.3x faster | 0.127mm²/s |
| Thermal shock resistance | 1,736W/m | not sourced |
| Glass transition | not sourced | 77.4°Csourcetypical |
| Max service temperature | not sourced | 76.2°CsourceHDT 0.455 MPa (printed specimens) |
| Values for | CoorsTek AD-96, nominal 96% Al2O3 sintered alumina, typical values; CoorsTek "Ceramic Seal Material Properties" (© 2018, 01899 F). AD-96 is the general 96% grade, not the ADS-96R substrate grade. | Ultimaker PETG, 3D-printed specimens, XY (flat); Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS v1.00, April 29, 2022. |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Plastic PETG is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Ceramic Alumina 96% stronger than Plastic PETG?
Ceramic Alumina 96% is stronger: its tensile strength is 221 MPa against yield strength 46.2 MPa for Plastic PETG (4.78x).
Which is lighter, Ceramic Alumina 96% or Plastic PETG?
Plastic PETG is lighter: 1,270 kg/m³ against 3,720 kg/m³ for Ceramic Alumina 96%.
Which is stiffer, Ceramic Alumina 96% or Plastic PETG?
Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 1.94 GPa for Plastic PETG, so the same part in Ceramic Alumina 96% deflects less under the same load.
Which is lighter for the same job, Ceramic Alumina 96% or Plastic PETG?
For the same stiffness or strength: Ceramic Alumina 96% is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie; Plastic PETG is lighter for a strong beam, strong panel or plate.
| Part that must be | Ceramic Alumina 96% | Plastic PETG |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 53.3x heavier |
| Stiff beam (bending) | lighter | 4.27x heavier |
| Stiff panel or plate | lighter | 1.84x heavier |
| Strong rod or tie | lighter | 1.63x heavier |
| Strong beam | 3% heavier | lighter |
| Strong panel or plate | 34% heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Ceramic Alumina 96% or Plastic PETG?
Ceramic Alumina 96% conducts heat better: 24.7 W/m·K against 0.21 W/m·K for Plastic PETG.
Which expands less with temperature?
Ceramic Alumina 96% expands less: 8.2 µm/m·K against 51 µm/m·K for Plastic PETG.