PC/ASA GF20 vs PC/ASA LG
Polymer · PC/ASA grade comparison
PC/ASA GF20 and PC/ASA LG are two grades of the same polymer grade, PC/ASA: GF20 (20% glass-fiber reinforced) versus LG (low-gloss / matte grade). The chemistry is identical, so every difference below comes from the condition. PC/ASA GF20 is the stronger of the two: yield strength 54 MPa (7.83 ksi) against 49 MPa (7.11 ksi) for PC/ASA LG, about 10% more; tensile strength follows at 85 MPa (12.3 ksi) vs 50 MPa (7.25 ksi). In exchange, PC/ASA LG is the more ductile: elongation 45% versus 3.5% for PC/ASA GF20. PC/ASA LG is lighter (1.15 g/cm³ vs 1.3 g/cm³ for PC/ASA GF20) and PC/ASA GF20 is stiffer (5.2 GPa vs 2.3 GPa). On the shop floor, PC/ASA LG machines more easily (65 vs 55 out of 100).
PC/ASA GF20Choose it when strength drives the design.
PC/ASA LGChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PC/ASA GF20 vs PC/ASA LG: 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)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 120°C248 °F · Water Absorption (24 h) 0.2% · Water Absorption (Saturation) 0.6%
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
Vicat Softening Point (B50)
Same in both: Thermal Conductivity 0.2 W/m·K0.12 BTU/hr·ft·°F · Specific Heat Capacity 1,300 J/kg·K0.31 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 24% · Max Service Temperature (short-term) 120°C248 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 28 kV/mm711 V/mil · Dielectric Constant (1 MHz) 3 · Dissipation Factor (1 MHz) 0.009 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁶ Ω · Comparative Tracking Index (CTI) 250 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 88 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Melt Flow Rate
Same in both: Polishability 70 / 100 · Processing Melt Temperature (typ.) 260°C500 °F · 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 polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
PC/ASA GF20 vs PC/ASA LG — frequently asked
Is PC/ASA GF20 stronger than PC/ASA LG?
Yes. PC/ASA GF20 has a typical yield strength of 54 MPa (7.83 ksi) against 49 MPa (7.11 ksi) for PC/ASA LG — about 10% more. Tensile strength is 85 MPa (12.3 ksi) vs 50 MPa (7.25 ksi).
Which grade does FabDigit quote by default, GF20 or LG?
UNF is the default PC/ASA condition in the FabDigit quote flow (neither GF20 nor LG). 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, PC/ASA GF20 or PC/ASA LG?
PC/ASA LG, by a small margin. Both rate good for machinability — 65/100 against 55/100 for PC/ASA GF20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PC/ASA GF20 and PC/ASA LG 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.