Materials / Compare
FDM ASA vs. PCB Laminate FR-4
Compare FDM ASA vs. PCB Laminate FR-4 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) | not given (tensile used) |
| Ultimate tensile strength | 37MPasourcetypical | 246–385MPasourcetypical, in-plane: cross direction .. length direction (ASTM D3039) |
| Flexural strength | 65MPasourcetypical | 531–621MPasourcetypical: cross direction .. length direction (IPC-TM-650 2.4.4B) |
| Elongation at break | 9.2%sourcetypical | not sourced |
| Young's modulus (stiffness) | 2.45GPasourcetypical | 21.9–25.8GPasourcetypical, in-plane: cross direction .. length direction (ASTM D790-15e2) |
| Density | 1,050kg/m³sourcetypical | 1,920kg/m³sourcetypical, 50% resin content; another FR-4 producer: Park Nelco N4000-6 (high-Tg multifunctional epoxy), not Isola 370HR |
| Strength to weight | 35.2kN·m/kg | 164kN·m/kg4.66x higher |
| Stiffness to weight | 2.33MN·m/kg | 12.4MN·m/kg5.33x higher |
| Poisson's ratio | not sourced | 0.171–0.177sourcetypical, in-plane: cross direction .. length direction |
| Shear modulus | not sourced | 10.2GPa |
| Bulk modulus | not sourced | 12.2GPa |
| Speed of sound | 1,528m/s | 3,525m/s |
| Thermal | ||
| Thermal conductivity | 0.17W/m·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, typical | 0.4W/m·Ksourcetypical (ASTM E1952); direction not stated by the sheet |
| Thermal expansion | 80–110µm/m·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, range | 13–14µm/m·Ksourcetypical, in-plane X/Y-axis, below Tg (IPC-TM-650 2.4.24C) |
| 100 mm part over a 50 °C swing | 475µm growth | 67.5µm growth7.04x less |
| Specific heat | not sourced | 1,200–1,400J/kg·Ksourcetypical (ASTM E1461); another FR-4 producer: Park Nelco N4000-6 (high-Tg multifunctional epoxy), not Isola 370HR |
| Heats up and cools (diffusivity) | not sourced | 0.16mm²/s |
| Thermal shock resistance | not sourced | 324W/m |
| Glass transition | not sourced | 180°Csourcetypical, DSC (IPC-TM-650 2.4.25C) |
| Max service temperature | 92°CsourceHDT 1.8 MPa | 130°CsourceUL Relative Thermal Index (UL 796) |
| Values for | Bambu Lab ASA, TDS V3.0, printed specimens X-Y; nozzle 260 °C, bed 80 °C, 200 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing. | Isola 370HR FR-4 laminate (Polyclad PCL-FR-370HR, 180 C Tg multifunctional epoxy, E-glass fabric), copper removed; Isola data sheet Revision C, last updated April 15, 2021. Woven-glass laminate: the sheet gives in-plane values per weave direction (length / cross) and the Z-axis CTE separately; the solver is isotropic per material. |
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 ASA is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is FDM ASA stronger than PCB Laminate FR-4?
PCB Laminate FR-4 is stronger: its tensile strength is 315 MPa against 37 MPa for FDM ASA (8.52x).
Which is lighter, FDM ASA or PCB Laminate FR-4?
FDM ASA is lighter: 1,050 kg/m³ against 1,920 kg/m³ for PCB Laminate FR-4.
Which is stiffer, FDM ASA or PCB Laminate FR-4?
PCB Laminate FR-4 is stiffer: Young's modulus 23.9 GPa against 2.45 GPa for FDM ASA, so the same part in PCB Laminate FR-4 deflects less under the same load.
Which is lighter for the same job, FDM ASA or PCB Laminate FR-4?
For the same stiffness or strength: PCB Laminate FR-4 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | FDM ASA | PCB Laminate FR-4 |
|---|---|---|
| Stiff rod or tie (tension) | 5.33x heavier | lighter |
| Stiff beam (bending) | 1.71x heavier | lighter |
| Stiff panel or plate | 17% heavier | lighter |
| Strong rod or tie | 4.66x heavier | lighter |
| Strong beam | 2.28x heavier | lighter |
| Strong panel or plate | 1.6x 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, FDM ASA or PCB Laminate FR-4?
PCB Laminate FR-4 conducts heat better: 0.4 W/m·K against 0.17 W/m·K for FDM ASA.
Which expands less with temperature?
PCB Laminate FR-4 expands less: 13.5 µm/m·K against 95 µm/m·K for FDM ASA.