Materials / Compare
FDM PAHT-CF vs. Iron
Compare FDM PAHT-CF vs. Iron strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | 186MPasourcetypical (0.2% YS), hot rolled + SRA/recrystallization anneal |
| Ultimate tensile strength | 92MPasourcetypical | 290MPasourcetypical, SRA/recrystallization anneal |
| Flexural strength | 125MPasourcetypical | not sourced |
| Elongation at break | 8.4%sourcetypical | 38%sourcetypical, gauge 4D0 |
| Young's modulus (stiffness) | 3.86GPasourcetypical | 207GPasourcetypical, after SRA/recrystallization anneal |
| Density | 1,060kg/m³sourcetypical7.42x lighter | 7,860kg/m³sourcetypical |
| Strength to weight | 86.8kN·m/kg3.67x higher | 23.7kN·m/kg |
| Stiffness to weight | 3.64MN·m/kg | 26.3MN·m/kg7.23x higher |
| Poisson's ratio | not sourced | 0.282sourceNIST critically evaluated best value (polycrystalline iron) |
| Shear modulus | not sourced | 80.7GPa |
| Bulk modulus | not sourced | 158GPa |
| Speed of sound | 1,908m/s | 5,132m/s |
| Thermal | ||
| Thermal conductivity | not sourced | 73.2W/m·Ksourcetypical at 20 °C |
| Thermal expansion | not sourced | 13.7µm/m·Ksourcemean, 20-399 °C |
| 100 mm part over a 50 °C swing | not sourced | 68.5µm growth |
| Specific heat | not sourced | 450J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | not sourced | 20.7mm²/s |
| Thermal shock resistance | not sourced | 3,447W/m |
| Melting point | 225°Csourcetypical | 1,532°Csourcetypical |
| Glass transition | 70°Csourcetypical | not sourced |
| Max service temperature | 170°CsourceHDT 1.8 MPa | not sourced |
| Values for | Bambu Lab PAHT-CF, TDS V3.0, printed specimens X-Y, dry state; nozzle 290 °C, bed 100 °C, 100 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing. | Cleveland-Cliffs / AK Steel ARMCO Pure Iron Product Data Bulletin (07/2022): Table 1 typical physical properties, Table 2 typical mechanical properties after SRA/recrystallization anneal. |
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.
FDM PAHT-CF is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is FDM PAHT-CF stronger than Iron?
Iron is stronger: its yield strength is 186 MPa against tensile strength 92 MPa for FDM PAHT-CF (2.02x).
Which is lighter, FDM PAHT-CF or Iron?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 7,860 kg/m³ for Iron.
Which is stiffer, FDM PAHT-CF or Iron?
Iron is stiffer: Young's modulus 207 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Iron deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Iron?
For the same stiffness or strength: FDM PAHT-CF is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate; Iron is lighter for a stiff rod or tie (tension).
| Part that must be | FDM PAHT-CF | Iron |
|---|---|---|
| Stiff rod or tie (tension) | 7.23x heavier | lighter |
| Stiff beam (bending) | lighter | 1% heavier |
| Stiff panel or plate | lighter | 1.97x heavier |
| Strong rod or tie | lighter | 3.67x heavier |
| Strong beam | lighter | 4.64x heavier |
| Strong panel or plate | lighter | 5.21x heavier |
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).