PU-GF-Filled GF30 vs PU-GF-Filled HT
Polyurethane · PU-GF-Filled grade comparison
PU-GF-Filled GF30 and PU-GF-Filled HT are two grades of the same polyurethane grade, PU-GF-Filled: GF30 (30 wt% short glass fibre filled) versus HT (heat-resistant glass-filled grade). The chemistry is identical, so every difference below comes from the condition. PU-GF-Filled HT is the stronger of the two: tensile strength 65 MPa (9.43 ksi) against 60 MPa (8.7 ksi) for PU-GF-Filled GF30, about 8% more. In exchange, PU-GF-Filled GF30 is the more ductile: elongation 2.5% versus 1.5% for PU-GF-Filled HT. PU-GF-Filled GF30 is lighter (1.55 g/cm³ vs 1.6 g/cm³ for PU-GF-Filled HT) and PU-GF-Filled HT is stiffer (6 GPa vs 5.5 GPa).
PU-GF-Filled GF30Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PU-GF-Filled HTChoose it when strength drives the design, or when the part sees heat.
PU-GF-Filled GF30 vs PU-GF-Filled HT: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polyurethane 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 polyurethane 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.
PU-GF-Filled GF30PU-GF-Filled HT
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Shore D
Same in both: Poisson's Ratio 0.38 · Compressive Strength 110 MPa16 ksi · Compressive Modulus 5 GPa0.73 Msi · Hardness, Rockwell R 118 HRR
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Same in both: Water Absorption (24 h) 0.2% · Water Absorption (Saturation) 1%
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.35 W/m·K0.2 BTU/hr·ft·°F · Specific Heat Capacity 1,300 J/kg·K0.31 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 45 µm/m·K25 µin/in·°F · Min Service Temperature -30°C-22 °F · Limiting Oxygen Index 21%
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in · Dielectric Strength 18 kV/mm457 V/mil · Dielectric Constant (1 MHz) 4.5 · Dissipation Factor (1 MHz) 0.04 · Volume Resistivity 1×10¹³ Ω·cm · Surface Resistivity 1×10¹³ Ω · Comparative Tracking Index (CTI) 500 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Weldability 5 / 100 · Formability (cold) 5 / 100 · Polishability 55 / 100 · Mold Shrinkage 0.15% · Mold Temperature (typ.) 65°C149 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 90 MJ/kg38,693 BTU/lb · Embodied Carbon (primary production) 5 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 0%
Strength versus weight
Yield strength against density for every polyurethane grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
PU-GF-Filled GF30 vs PU-GF-Filled HT — frequently asked
Is PU-GF-Filled HT stronger than PU-GF-Filled GF30?
Yes. PU-GF-Filled HT has a typical tensile strength of 65 MPa (9.43 ksi) against 60 MPa (8.7 ksi) for PU-GF-Filled GF30 — about 8% more.
Which grade does FabDigit quote by default, GF30 or HT?
GF30 is the default PU-GF-Filled condition in the FabDigit quote flow. 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.
When should I choose PU-GF-Filled GF30 over PU-GF-Filled HT?
Pick PU-GF-Filled GF30 when the part is bent, formed or impact-loaded, or when weight is the constraint. Pick PU-GF-Filled HT when strength drives the design, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PU-GF-Filled GF30 and PU-GF-Filled HT 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.