GF Nylon-Like FR vs GF Nylon-Like GF30
Polyurethane · GF Nylon-Like grade comparison
GF Nylon-Like FR and GF Nylon-Like GF30 are two grades of the same polyurethane grade, GF Nylon-Like: FR (flame-retardant glass-filled grade) versus GF30 (~30–40 % glass reinforced). The chemistry is identical, so every difference below comes from the condition. GF Nylon-Like GF30 is the stronger of the two: tensile strength 68 MPa (9.86 ksi) against 52 MPa (7.54 ksi) for GF Nylon-Like FR, about 31% more. In exchange, GF Nylon-Like FR is the more ductile: elongation 3.5% versus 2.5% for GF Nylon-Like GF30. GF Nylon-Like FR is lighter (1.5 g/cm³ vs 1.55 g/cm³ for GF Nylon-Like GF30) and GF Nylon-Like GF30 is stiffer (6 GPa vs 4 GPa).
GF Nylon-Like FRChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
GF Nylon-Like GF30Choose it when strength drives the design, or when the part sees heat.
GF Nylon-Like FR vs GF Nylon-Like GF30: 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.
GF Nylon-Like FRGF Nylon-Like GF30
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
Hardness, Shore D
Hardness, Rockwell R
Same in both: Poisson's Ratio 0.38 · Izod Impact, Notched 30 J/m0.56 ft·lbf/in
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 95°C203 °F · Water Absorption (24 h) 0.3% · Water Absorption (Saturation) 1.2%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Limiting Oxygen Index
Same in both: Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Max Service Temperature (short-term) 130°C266 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Dielectric Strength 18 kV/mm457 V/mil · Dielectric Constant (1 MHz) 3.8 · Dissipation Factor (1 MHz) 0.03 · Volume Resistivity 1×10¹⁴ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Polishability 45 / 100 · Mold Temperature (typ.) 70°C158 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb · Embodied Carbon (primary production) 5.5 kg CO₂/kg · Embodied Water 250 L/kg30 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.
GF Nylon-Like FR vs GF Nylon-Like GF30 — frequently asked
Is GF Nylon-Like GF30 stronger than GF Nylon-Like FR?
Yes. GF Nylon-Like GF30 has a typical tensile strength of 68 MPa (9.86 ksi) against 52 MPa (7.54 ksi) for GF Nylon-Like FR — about 31% more.
Which grade does FabDigit quote by default, FR or GF30?
GF-STD is the default GF Nylon-Like 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.
When should I choose GF Nylon-Like FR over GF Nylon-Like GF30?
Pick GF Nylon-Like FR when the part is bent, formed or impact-loaded, or when weight is the constraint. Pick GF Nylon-Like GF30 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 GF Nylon-Like FR and GF Nylon-Like 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.