RTPU GF30 vs RTPU HS
Polymer · RTPU grade comparison
RTPU GF30 and RTPU HS are two grades of the same polymer grade, RTPU: GF30 (30 % glass-fibre reinforced) versus HS (hydrolysis / chemical-resistance stabilised grade). The chemistry is identical, so every difference below comes from the condition. RTPU GF30 is the stronger of the two: tensile strength 115 MPa (16.7 ksi) against 55 MPa (7.98 ksi) for RTPU HS, about 109% more. In exchange, RTPU HS is the more ductile: elongation 160% versus 5% for RTPU GF30. RTPU HS is lighter (1.2 g/cm³ vs 1.43 g/cm³ for RTPU GF30) and RTPU GF30 is stiffer (8 GPa vs 2 GPa). On the shop floor, RTPU HS machines more easily (good vs fair).
RTPU GF30Choose it when strength drives the design, or when the part sees heat.
RTPU HSChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
RTPU GF30 vs RTPU HS: 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)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Same in both: Poisson's Ratio 0.4 · Compressive Modulus 2 GPa0.29 Msi
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)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
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 · Min Service Temperature -40°C-40 °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).
Corrosion Resistance
Same in both: UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Mold Shrinkage
Same in both: 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 GF30 vs RTPU HS — frequently asked
Is RTPU GF30 stronger than RTPU HS?
Yes. RTPU GF30 has a typical tensile strength of 115 MPa (16.7 ksi) against 55 MPa (7.98 ksi) for RTPU HS — about 109% more.
Which grade does FabDigit quote by default, GF30 or HS?
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 GF30 or RTPU HS?
RTPU HS. Its machinability rates good (60/100) against fair (45/100) for RTPU GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in RTPU GF30 and RTPU HS 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.