Materials / Compare
Ceramic Alumina 96% vs. Stainless Steel 17-4PH
Compare Ceramic Alumina 96% vs. Stainless Steel 17-4PH 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) | 1,275MPasourcetypical, transverse, sheet/strip |
| Ultimate tensile strength | 221MPasourcetypical tensile strength, 25 °C (ACMA Test #4) | 1,379MPasourcetypical, transverse, sheet/strip |
| Compressive strength | 2,068MPasourcetypical, 20 °C (ASTM-C773) | not sourced |
| Flexural strength | 358MPasourceflexural strength (MOR), 20 °C (ASTM-F417) | not sourced |
| Elongation at break | not sourced | 9%sourcetypical, transverse, in 2 in. (50.8 mm) |
| Young's modulus (stiffness) | 303GPasourcetypical, 20 °C (ASTM-C848) | 197GPasourceH 900 |
| Density | 3,720kg/m³sourcetypical (ASTM-C20) | 7,800kg/m³sourceH 900 |
| Strength to weight | 59.4kN·m/kg | 163kN·m/kg2.75x higher |
| Stiffness to weight | 81.5MN·m/kg3.22x higher | 25.3MN·m/kg |
| Poisson's ratio | 0.21sourcetypical, 20 °C (ASTM-C848) | 0.272sourceH 900 (column) |
| Shear modulus | 125GPa1.62x stiffer in shear | 77.4GPa |
| Bulk modulus | 174GPa | 144GPa |
| Speed of sound | 9,025m/s | 5,026m/s |
| Thermal | ||
| Thermal conductivity | 24.7W/m·Ksourcetypical, 20 °C (ASTM-C408) | 17.9W/m·Ksourceat 149 °C (300 °F), H 900 |
| Thermal expansion | 8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372) | 10.8µm/m·Ksourcemean, 21–93 °C (70–200 °F), H 900 |
| 100 mm part over a 50 °C swing | 41µm growth32% less | 54µm growth |
| Specific heat | 880J/kg·Ksourcetypical, 100 °C (ASTM-E1269) | 460J/kg·Ksourcemean, 0–100 °C, H 900 |
| Heats up and cools (diffusivity) | 7.55mm²/s1.51x faster | 4.99mm²/s |
| Thermal shock resistance | 1,736W/m | 7,809W/m4.5x more resistant |
| Max service temperature | not sourced | 316°Csourcestrength-retention limit (not oxidation) |
| 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. | Cleveland-Cliffs 17-4 PH, Condition H 900, sheet/strip, transverse (Product Data Bulletin, May 2021) |
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.
Questions
Is Ceramic Alumina 96% stronger than Stainless Steel 17-4PH?
Stainless Steel 17-4PH is stronger: its yield strength is 1,275 MPa against tensile strength 221 MPa for Ceramic Alumina 96% (5.77x).
Which is lighter, Ceramic Alumina 96% or Stainless Steel 17-4PH?
Ceramic Alumina 96% is lighter: 3,720 kg/m³ against 7,800 kg/m³ for Stainless Steel 17-4PH.
Which is stiffer, Ceramic Alumina 96% or Stainless Steel 17-4PH?
Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 197 GPa for Stainless Steel 17-4PH, 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 Stainless Steel 17-4PH?
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; Stainless Steel 17-4PH is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Ceramic Alumina 96% | Stainless Steel 17-4PH |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 3.22x heavier |
| Stiff beam (bending) | lighter | 2.6x heavier |
| Stiff panel or plate | lighter | 2.42x heavier |
| Strong rod or tie | 2.75x heavier | lighter |
| Strong beam | 1.53x heavier | lighter |
| Strong panel or plate | 15% 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 Stainless Steel 17-4PH?
Ceramic Alumina 96% conducts heat better: 24.7 W/m·K against 17.9 W/m·K for Stainless Steel 17-4PH.
Which expands less with temperature?
Ceramic Alumina 96% expands less: 8.2 µm/m·K against 10.8 µm/m·K for Stainless Steel 17-4PH.
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