MXD6 GF30 vs MXD6 Unfilled
Polymer · MXD6 grade comparison
MXD6 GF30 and MXD6 Unfilled are two grades of the same polymer grade, MXD6: GF30 (30% glass-fiber reinforced injection grade) versus Unfilled (unfilled / natural). The chemistry is identical, so every difference below comes from the condition. MXD6 GF30 is the stronger of the two: tensile strength 200 MPa (29 ksi) against 100 MPa (14.5 ksi) for MXD6 Unfilled, about 100% more. In exchange, MXD6 Unfilled is the more ductile: elongation 3% versus 2.5% for MXD6 GF30. MXD6 Unfilled is lighter (1.22 g/cm³ vs 1.48 g/cm³ for MXD6 GF30) and MXD6 GF30 is stiffer (10 GPa vs 4.3 GPa). On the shop floor, MXD6 Unfilled machines more easily (good vs fair).
MXD6 GF30Choose it when strength drives the design, or when the part sees heat.
MXD6 UnfilledChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
MXD6 GF30 vs MXD6 Unfilled: 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
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Hardness, Rockwell M
Same in both: Compressive Strength 170 MPa24.7 ksi
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Melting Temperature (Tm) 240°C464 °F · Glass Transition (Tg) 88°C190 °F
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
Same in both: Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 24% · Max Service Temperature (short-term) 200°C392 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 25 kV/mm635 V/mil · Dielectric Constant (1 MHz) 4 · Dissipation Factor (1 MHz) 0.02 · Volume Resistivity 1×10¹⁴ Ω·cm · Comparative Tracking Index (CTI) 550 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 55 / 100 · Formability (cold) 15 / 100 · Processing Melt Temperature (typ.) 270°C518 °F · Mold Temperature (typ.) 130°C266 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 130 MJ/kg55,890 BTU/lb · Embodied Carbon (primary production) 7.5 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.
MXD6 GF30 vs MXD6 Unfilled — frequently asked
Is MXD6 GF30 stronger than MXD6 Unfilled?
Yes. MXD6 GF30 has a typical tensile strength of 200 MPa (29 ksi) against 100 MPa (14.5 ksi) for MXD6 Unfilled — about 100% more.
Which grade does FabDigit quote by default, GF30 or Unfilled?
GF30 is the default MXD6 condition in the FabDigit quote flow. 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, MXD6 GF30 or MXD6 Unfilled?
MXD6 Unfilled. Its machinability rates good (60/100) against fair (40/100) for MXD6 GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MXD6 GF30 and MXD6 Unfilled 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.