LCP Type I vs LCP Type III
Polymer · grade comparison
LCP Type I and LCP Type III are both polymer grades. LCP Type III is the stronger of the two: tensile strength 150 MPa (21.8 ksi) against 135 MPa (19.6 ksi) for LCP Type I, about 11% more. LCP Type III is the more ductile: elongation 3% versus 2.5% for LCP Type I. LCP Type I is stiffer (11 GPa vs 10 GPa) and LCP Type I runs hotter in service (220°C vs 170°C continuous). On the shop floor, LCP Type III welds better (30 vs 20 out of 100).
LCP Type IChoose it when the part sees heat.
LCP Type IIIChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
LCP Type I vs LCP Type III: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Modulus
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Rockwell M
Same in both: Shear Modulus 1.2 GPa0.17 Msi · Compressive Strength 65 MPa9.4 ksi · Shear Strength 55 MPa8 ksi · Hardness, Shore D 88 Shore D
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
Glass Transition (Tg)
Water Absorption (Saturation)
Same in both: Water Absorption (24 h) 0.02%
Thermal
How each material carries heat and how hot it can run.
Specific Heat Capacity
Max Service Temperature (continuous)
Min Service Temperature
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.3 W/m·K0.17 BTU/hr·ft·°F · Thermal Expansion (CTE, 20–100 °C) 8 µm/m·K4.4 µin/in·°F
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) 0.004 · 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 92 / 100 · UV / Weathering Resistance 45 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Polishability
Mold Shrinkage
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Melt Flow Rate
Same in both: Formability (cold) 20 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 0.2 mm²/s
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.
Manufacturing and finishing
| Capability | LCP Type I | LCP Type III |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
LCP Type I vs LCP Type III — frequently asked
Is LCP Type III stronger than LCP Type I?
Yes. LCP Type III has a typical tensile strength of 150 MPa (21.8 ksi) against 135 MPa (19.6 ksi) for LCP Type I — about 11% more.
Which is cheaper, LCP Type I or LCP Type III?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, LCP Type I or LCP Type III?
LCP Type I, by a small margin. Both rate good for machinability — 62/100 against 55/100 for LCP Type III; for welding the order is LCP Type III first (poor, 30/100) then LCP Type I (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in LCP Type I and LCP Type III 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.