GF Nylon-Like GF15 vs GF Nylon-Like GF30
Polyurethane · GF Nylon-Like grade comparison
GF Nylon-Like GF15 and GF Nylon-Like GF30 are two grades of the same polyurethane grade, GF Nylon-Like: GF15 (~15 % glass reinforced) 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 55 MPa (7.98 ksi) for GF Nylon-Like GF15, about 24% more. In exchange, GF Nylon-Like GF15 is the more ductile: elongation 9% versus 2.5% for GF Nylon-Like GF30, and GF Nylon-Like GF30 is harder (88 Shore D vs 82 Shore D). GF Nylon-Like GF15 is lighter (1.3 g/cm³ vs 1.55 g/cm³ for GF Nylon-Like GF30) and GF Nylon-Like GF30 is stiffer (6 GPa vs 3 GPa). On the shop floor, GF Nylon-Like GF15 machines more easily (good vs fair).
GF Nylon-Like GF15Choose 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 GF15 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 GF15GF Nylon-Like GF30
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 100 MPa14.5 ksi · Hardness, Rockwell R 112 HRR
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 Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: Thermal Conductivity 0.3 W/m·K0.17 BTU/hr·ft·°F · Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 21% · Max Service Temperature (short-term) 130°C266 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · 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).
Same in both: Corrosion Resistance 60 / 100 · 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 GF15 vs GF Nylon-Like GF30 — frequently asked
Is GF Nylon-Like GF30 stronger than GF Nylon-Like GF15?
Yes. GF Nylon-Like GF30 has a typical tensile strength of 68 MPa (9.86 ksi) against 55 MPa (7.98 ksi) for GF Nylon-Like GF15 — about 24% more.
Which grade does FabDigit quote by default, GF15 or GF30?
GF-STD is the default GF Nylon-Like condition in the FabDigit quote flow (neither GF15 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.
Which is easier to machine, GF Nylon-Like GF15 or GF Nylon-Like GF30?
GF Nylon-Like GF15. Its machinability rates good (55/100) against fair (45/100) for GF Nylon-Like GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in GF Nylon-Like GF15 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.