RTPU GF10 vs RTPU GF20
Polymer · RTPU grade comparison
RTPU GF10 and RTPU GF20 are two grades of the same polymer grade, RTPU: GF10 (10 % glass-fibre reinforced) versus GF20 (20 % glass-fibre reinforced). The chemistry is identical, so every difference below comes from the condition. RTPU GF20 is the stronger of the two: tensile strength 95 MPa (13.8 ksi) against 72 MPa (10.4 ksi) for RTPU GF10, about 32% more. In exchange, RTPU GF10 is the more ductile: elongation 25% versus 8% for RTPU GF20. RTPU GF10 is lighter (1.27 g/cm³ vs 1.35 g/cm³ for RTPU GF20) and RTPU GF20 is stiffer (5.5 GPa vs 3.5 GPa).
RTPU GF10Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
RTPU GF20Choose it when strength drives the design.
RTPU GF10 vs RTPU GF20: 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
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Same in both: Poisson's Ratio 0.4 · Yield Strength (0.2% offset) 52 MPa7.5 ksi · Compressive Strength 60 MPa8.7 ksi · Compressive Modulus 2 GPa0.29 Msi · Shear Strength 40 MPa5.8 ksi · Hardness, Shore D 78 Shore D · Hardness, Rockwell R 115 HRR
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 100°C212 °F · Water Absorption (24 h) 0.3% · Water Absorption (Saturation) 1.3% · Refractive Index 1.55 · Light Transmission 85%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Same in both: Thermal Conductivity 0.2 W/m·K0.12 BTU/hr·ft·°F · Specific Heat Capacity 1,600 J/kg·K0.38 BTU/lb·°F · Max Service Temperature (continuous) 80°C176 °F · Min Service Temperature -40°C-40 °F · Heat Deflection Temp. @ 0.45 MPa 95°C203 °F · Vicat Softening Point (B50) 88°C190 °F · Limiting Oxygen Index 21% · Max Service Temperature (short-term) 110°C230 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 24 kV/mm610 V/mil · Dielectric Constant (1 MHz) 4 · Dissipation Factor (1 MHz) 0.03 · Volume Resistivity 1×10¹⁴ Ω·cm · Surface Resistivity 1×10¹⁴ Ω · Comparative Tracking Index (CTI) 600 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 70 / 100 · Formability (cold) 60 / 100 · Polishability 60 / 100 · Melt Flow Rate 15 g/10 min · Processing Melt Temperature (typ.) 215°C419 °F · Mold Temperature (typ.) 40°C104 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 118 MJ/kg50,731 BTU/lb · Embodied Carbon (primary production) 5.5 kg CO₂/kg · Embodied Water 260 L/kg31.2 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.
RTPU GF10 vs RTPU GF20 — frequently asked
Is RTPU GF20 stronger than RTPU GF10?
Yes. RTPU GF20 has a typical tensile strength of 95 MPa (13.8 ksi) against 72 MPa (10.4 ksi) for RTPU GF10 — about 32% more.
Which grade does FabDigit quote by default, GF10 or GF20?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, RTPU GF10 or RTPU GF20?
RTPU GF10. Its machinability rates good (55/100) against fair (50/100) for RTPU GF20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in RTPU GF10 and RTPU GF20 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.