PSU-GF20 FR vs PSU-GF20 GF30
Polymer · PSU-GF20 grade comparison
PSU-GF20 FR and PSU-GF20 GF30 are two grades of the same polymer grade, PSU-GF20: FR (flame-retardant grade) versus GF30 (30% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. PSU-GF20 GF30 is the stronger of the two: tensile strength 124 MPa (18 ksi) against 95 MPa (13.8 ksi) for PSU-GF20 FR, about 31% more. In exchange, PSU-GF20 FR is the more ductile: elongation 2.5% versus 2% for PSU-GF20 GF30. PSU-GF20 FR is lighter (1.38 g/cm³ vs 1.45 g/cm³ for PSU-GF20 GF30) and PSU-GF20 GF30 is stiffer (8.3 GPa vs 6 GPa).
PSU-GF20 FRChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PSU-GF20 GF30Choose it when strength drives the design.
PSU-GF20 FR vs PSU-GF20 GF30: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Shear Modulus 2.3 GPa0.33 Msi · Poisson's Ratio 0.39 · Compressive Modulus 5.5 GPa0.8 Msi
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 187°C369 °F · Water Absorption (24 h) 0.22% · Water Absorption (Saturation) 0.6%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Limiting Oxygen Index
Same in both: Thermal Conductivity 0.28 W/m·K0.16 BTU/hr·ft·°F · Specific Heat Capacity 1,150 J/kg·K0.27 BTU/lb·°F · Min Service Temperature -100°C-148 °F · Max Service Temperature (short-term) 190°C374 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 17 kV/mm432 V/mil · Dielectric Constant (1 MHz) 3.6 · Dissipation Factor (1 MHz) 0.006 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 150 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Melt Flow Rate
Same in both: Polishability 35 / 100 · Processing Melt Temperature (typ.) 355°C671 °F · Mold Temperature (typ.) 150°C302 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 135 MJ/kg58,040 BTU/lb · Embodied Carbon (primary production) 7.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 0%
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
PSU-GF20 FR vs PSU-GF20 GF30 — frequently asked
Is PSU-GF20 GF30 stronger than PSU-GF20 FR?
Yes. PSU-GF20 GF30 has a typical tensile strength of 124 MPa (18 ksi) against 95 MPa (13.8 ksi) for PSU-GF20 FR — about 31% more.
Which grade does FabDigit quote by default, FR or GF30?
GF20 is the default PSU-GF20 condition in the FabDigit quote flow (neither FR nor GF30). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, PSU-GF20 FR or PSU-GF20 GF30?
PSU-GF20 GF30. Its weldability rates fair (40/100) against fair (35/100) for PSU-GF20 FR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PSU-GF20 FR and PSU-GF20 GF30 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.