Materials / Compare
PCB Laminate FR-4 vs. Plastic PPS GF40
Compare PCB Laminate FR-4 vs. Plastic PPS GF40 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 | 246–385MPasourcetypical, in-plane: cross direction .. length direction (ASTM D3039) | 195MPasourcetensile strength, 5 mm/min |
| Flexural strength | 531–621MPasourcetypical: cross direction .. length direction (IPC-TM-650 2.4.4B) | 285MPasourceflexural strength at break |
| Elongation at break | not sourced | 1.9%sourcestrain at break, 5 mm/min |
| Young's modulus (stiffness) | 21.9–25.8GPasourcetypical, in-plane: cross direction .. length direction (ASTM D790-15e2) | 14.7GPasourcetypical, 1 mm/min |
| Density | 1,920kg/m³sourcetypical, 50% resin content; another FR-4 producer: Park Nelco N4000-6 (high-Tg multifunctional epoxy), not Isola 370HR | 1,650kg/m³sourcetypical |
| Strength to weight | 164kN·m/kg39% higher | 118kN·m/kg |
| Stiffness to weight | 12.4MN·m/kg39% higher | 8.91MN·m/kg |
| Poisson's ratio | 0.171–0.177sourcetypical, in-plane: cross direction .. length direction | 0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific) |
| Shear modulus | 10.2GPa1.87x stiffer in shear | 5.44GPa |
| Bulk modulus | 12.2GPa | 16.3GPa |
| Speed of sound | 3,525m/s | 2,985m/s |
| Thermal | ||
| Thermal conductivity | 0.4W/m·Ksourcetypical (ASTM E1952); direction not stated by the sheet | 0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific) |
| Thermal expansion | 13–14µm/m·Ksourcetypical, in-plane X/Y-axis, below Tg (IPC-TM-650 2.4.24C) | 12µm/m·Ksourceparallel (flow), mean -50 to 90 °C |
| 100 mm part over a 50 °C swing | 67.5µm growth | 60µm growth12% less |
| Specific heat | 1,200–1,400J/kg·Ksourcetypical (ASTM E1461); another FR-4 producer: Park Nelco N4000-6 (high-Tg multifunctional epoxy), not Isola 370HR | not sourced |
| Heats up and cools (diffusivity) | 0.16mm²/s | not sourced |
| Thermal shock resistance | 324W/m2.25x more resistant | 144W/m |
| Melting point | not sourced | 280°CsourceDSC, 10 °C/min |
| Glass transition | 180°Csourcetypical, DSC (IPC-TM-650 2.4.25C) | 90°CsourceDSC, 10 °C/min |
| Max service temperature | 130°CsourceUL Relative Thermal Index (UL 796) | 270°CsourceHDT 1.8 MPa |
| Values for | 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. | Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013). |
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 PCB Laminate FR-4 stronger than Plastic PPS GF40?
PCB Laminate FR-4 is stronger: its tensile strength is 315 MPa against 195 MPa for Plastic PPS GF40 (1.62x).
Which is lighter, PCB Laminate FR-4 or Plastic PPS GF40?
Plastic PPS GF40 is lighter: 1,650 kg/m³ against 1,920 kg/m³ for PCB Laminate FR-4.
Which is stiffer, PCB Laminate FR-4 or Plastic PPS GF40?
PCB Laminate FR-4 is stiffer: Young's modulus 23.9 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in PCB Laminate FR-4 deflects less under the same load.
Which is lighter for the same job, PCB Laminate FR-4 or Plastic PPS GF40?
For the same stiffness or strength: PCB Laminate FR-4 is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie, strong beam, strong panel or plate.
| Part that must be | PCB Laminate FR-4 | Plastic PPS GF40 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 39% heavier |
| Stiff beam (bending) | lighter | 9% heavier |
| Stiff panel or plate | about equal | about equal |
| Strong rod or tie | lighter | 39% heavier |
| Strong beam | lighter | 18% heavier |
| Strong panel or plate | lighter | 9% 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).
Which conducts heat better, PCB Laminate FR-4 or Plastic PPS GF40?
PCB Laminate FR-4 conducts heat better: 0.4 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
Plastic PPS GF40 expands less: 12 µm/m·K against 13.5 µm/m·K for PCB Laminate FR-4.