PBT-GF30 GF30 vs PBT-GF30 GF30-HS
Polymer · PBT-GF30 grade comparison
PBT-GF30 GF30 and PBT-GF30 GF30-HS are two grades of the same polymer grade, PBT-GF30: GF30 (30% glass fiber, natural / uncolored, unmodified) versus GF30-HS. The chemistry is identical, so every difference below comes from the condition. PBT-GF30 GF30-HS runs hotter in service (150°C vs 130°C continuous).
PBT-GF30 GF30-HSChoose it when the part sees heat.
PBT-GF30 GF30 vs PBT-GF30 GF30-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.
Izod Impact, Notched
Same in both: Elastic (Young's) Modulus 10 GPa1.5 Msi · Shear Modulus 3.6 GPa0.52 Msi · Poisson's Ratio 0.38 · Tensile Strength (Ultimate) 130 MPa18.9 ksi · Elongation at Break 3% · Compressive Strength 130 MPa18.9 ksi · Compressive Modulus 8.5 GPa1.2 Msi · Flexural Strength 200 MPa29 ksi · Flexural Modulus 9 GPa1.3 Msi · Shear Strength 60 MPa8.7 ksi · Fracture Toughness (K_IC) 3.5 MPa·√m3.2 ksi·√in · Hardness, Shore D 85 Shore D · Hardness, Rockwell M 90 HRM · Hardness, Rockwell R 120 HRR
Physical
Density and transition temperatures.
Same in both: Density 1.53 g/cm³0.06 lb/in³ · Melting Temperature (Tm) 225°C437 °F · Glass Transition (Tg) 50°C122 °F · Water Absorption (24 h) 0.06% · Water Absorption (Saturation) 0.35%
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.25 W/m·K0.14 BTU/hr·ft·°F · Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 25 µm/m·K13.9 µin/in·°F · Min Service Temperature -40°C-40 °F · Heat Deflection Temp. @ 0.45 MPa 215°C419 °F · Heat Deflection Temp. @ 1.8 MPa 207°C405 °F · Vicat Softening Point (B50) 200°C392 °F · Limiting Oxygen Index 22%
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 30 kV/mm762 V/mil · Dielectric Constant (1 MHz) 3.7 · Dissipation Factor (1 MHz) 0.02 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 550 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 82 / 100 · UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Melt Flow Rate
Same in both: Formability (cold) 10 / 100 · Polishability 30 / 100 · Mold Shrinkage 0.4% · Processing Melt Temperature (typ.) 260°C500 °F · Mold Temperature (typ.) 80°C176 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 85 MJ/kg36,543 BTU/lb · Embodied Carbon (primary production) 4.4 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 5%
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.
PBT-GF30 GF30 vs PBT-GF30 GF30-HS — frequently asked
What is the difference between PBT-GF30 GF30 and PBT-GF30 GF30-HS?
PBT-GF30 GF30 and PBT-GF30 GF30-HS are two grades of the same polymer grade, PBT-GF30: GF30 (30% glass fiber, natural / uncolored, unmodified) versus GF30-HS. The chemistry is identical, so every difference below comes from the condition. PBT-GF30 GF30-HS runs hotter in service (150°C vs 130°C continuous).
Which grade does FabDigit quote by default, GF30 or GF30-HS?
GF30 is the default PBT-GF30 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.
Which is easier to machine, PBT-GF30 GF30 or PBT-GF30 GF30-HS?
PBT-GF30 GF30-HS, by a small margin. Both rate good for machinability — 60/100 against 55/100 for PBT-GF30 GF30; for welding the order is PBT-GF30 GF30 first (fair, 45/100) then PBT-GF30 GF30-HS (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PBT-GF30 GF30 and PBT-GF30 GF30-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.