LCP Type II GF30 vs LCP Type II GF40
Polymer · LCP Type II grade comparison
LCP Type II GF30 and LCP Type II GF40 are two grades of the same polymer grade, LCP Type II: GF30 (30 % glass-fiber reinforced) versus GF40 (40 % glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. LCP Type II GF40 is the stronger of the two: tensile strength 150 MPa (21.8 ksi) against 140 MPa (20.3 ksi) for LCP Type II GF30, about 7% more. In exchange, LCP Type II GF30 is the more ductile: elongation 2.1% versus 1.7% for LCP Type II GF40. LCP Type II GF30 is lighter (1.62 g/cm³ vs 1.75 g/cm³ for LCP Type II GF40) and LCP Type II GF40 is stiffer (19 GPa vs 15 GPa).
LCP Type II GF30Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
LCP Type II GF40Choose it when strength drives the design.
LCP Type II GF30 vs LCP Type II 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.
LCP Type II GF30LCP Type II GF40
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 1.5 GPa0.22 Msi · Poisson's Ratio 0.4 · Compressive Strength 70 MPa10.2 ksi · Shear Strength 45 MPa6.5 ksi · Hardness, Shore D 87 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) 110°C230 °F · Water Absorption (24 h) 0.02% · Water Absorption (Saturation) 0.1%
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
Max Service Temperature (short-term)
Same in both: Specific Heat Capacity 1,200 J/kg·K0.29 BTU/lb·°F · Min Service Temperature -100°C-148 °F · Limiting Oxygen Index 38%
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Same in both: Electrical Resistivity 1×10¹³ Ω·m3.94×10²⁰ µΩ·in · Dielectric Strength 35 kV/mm889 V/mil · Dissipation Factor (1 MHz) 0.008 · Volume Resistivity 1×10¹⁵ Ω·cm · Surface Resistivity 1×10¹⁵ 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 40 / 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 40 / 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) 250 MJ/kg107,481 BTU/lb · Embodied Carbon (primary production) 12 kg CO₂/kg · Embodied Water 400 L/kg47.9 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.
LCP Type II GF30 vs LCP Type II GF40 — frequently asked
Is LCP Type II GF40 stronger than LCP Type II GF30?
Yes. LCP Type II GF40 has a typical tensile strength of 150 MPa (21.8 ksi) against 140 MPa (20.3 ksi) for LCP Type II GF30 — about 7% more.
Which grade does FabDigit quote by default, GF30 or GF40?
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, LCP Type II GF30 or LCP Type II GF40?
LCP Type II GF30, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for LCP Type II GF40.
Ready to make it?
Upload a CAD file and FabDigit prices the part in LCP Type II GF30 and LCP Type II 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.