Laperos GF15 vs Laperos GF40
Polymer · Laperos grade comparison
Laperos GF15 and Laperos GF40 are two grades of the same polymer grade, Laperos: GF15 (15% glass-fiber reinforced) versus GF40 (40% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Laperos GF40 is the stronger of the two: tensile strength 160 MPa (23.2 ksi) against 145 MPa (21 ksi) for Laperos GF15, about 10% more. In exchange, Laperos GF15 is the more ductile: elongation 3% versus 1.8% for Laperos GF40. Laperos GF15 is lighter (1.5 g/cm³ vs 1.75 g/cm³ for Laperos GF40) and Laperos GF40 is stiffer (19 GPa vs 11 GPa). On the shop floor, Laperos GF15 machines more easily (fair vs poor).
Laperos GF15Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
Laperos GF40Choose it when strength drives the design.
Laperos GF15 vs Laperos GF40: 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: Shear Modulus 3 GPa0.44 Msi · Poisson's Ratio 0.35 · Hardness, Shore D 88 Shore D · Hardness, Rockwell M 85 HRM
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 280°C536 °F · Glass Transition (Tg) 120°C248 °F · Water Absorption (24 h) 0.02% · Water Absorption (Saturation) 0.06%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,050 J/kg·K0.25 BTU/lb·°F · Max Service Temperature (continuous) 220°C428 °F · Min Service Temperature -50°C-58 °F · Heat Deflection Temp. @ 0.45 MPa 265°C509 °F · Limiting Oxygen Index 40% · Max Service Temperature (short-term) 280°C536 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 35 kV/mm889 V/mil · Dielectric Constant (1 MHz) 3.9 · Dissipation Factor (1 MHz) 0.006 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁶ Ω · Comparative Tracking Index (CTI) 200 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 90 / 100 · UV / Weathering Resistance 50 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 25 / 100 · Formability (cold) 15 / 100 · Polishability 35 / 100 · Processing Melt Temperature (typ.) 310°C590 °F · Mold Temperature (typ.) 100°C212 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 190 MJ/kg81,685 BTU/lb · Embodied Carbon (primary production) 9 kg CO₂/kg · 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.
Laperos GF15 vs Laperos GF40 — frequently asked
Is Laperos GF40 stronger than Laperos GF15?
Yes. Laperos GF40 has a typical tensile strength of 160 MPa (23.2 ksi) against 145 MPa (21 ksi) for Laperos GF15 — about 10% more.
Which grade does FabDigit quote by default, GF15 or GF40?
GF30 is the default Laperos condition in the FabDigit quote flow (neither GF15 nor GF40). 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, Laperos GF15 or Laperos GF40?
Laperos GF15. Its machinability rates fair (45/100) against poor (32/100) for Laperos GF40.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Laperos GF15 and Laperos GF40 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.