Zenite GF30 vs Zenite LUB
Polymer · Zenite grade comparison
Zenite GF30 and Zenite LUB are two grades of the same polymer grade, Zenite: GF30 (30 % glass-fiber reinforced) versus LUB (wear / lubricated grade). The chemistry is identical, so every difference below comes from the condition. Zenite GF30 is the stronger of the two: tensile strength 150 MPa (21.8 ksi) against 110 MPa (16 ksi) for Zenite LUB, about 36% more. Zenite GF30 is the more ductile: elongation 1.8% versus 1.5% for Zenite LUB. Zenite GF30 is lighter (1.61 g/cm³ vs 1.72 g/cm³ for Zenite LUB) and Zenite GF30 is stiffer (15 GPa vs 12 GPa). On the shop floor, Zenite LUB machines more easily (50 vs 35 out of 100) and Zenite GF30 welds better (30 vs 15 out of 100).
Zenite GF30Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Zenite LUBChoose it when the part is machined in volume.
Zenite GF30 vs Zenite LUB: 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
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Same in both: Shear Modulus 1.6 GPa0.23 Msi · Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 335°C635 °F · Glass Transition (Tg) 125°C257 °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
Limiting Oxygen Index
Same in both: Specific Heat Capacity 1,200 J/kg·K0.29 BTU/lb·°F · Min Service Temperature -50°C-58 °F · Max Service Temperature (short-term) 280°C536 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Same in both: Dielectric Strength 35 kV/mm889 V/mil · Dissipation Factor (1 MHz) 0.003 · Volume Resistivity 1×10¹⁵ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 175 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
Formability (cold)
Mold Shrinkage
Same in both: Polishability 40 / 100 · Processing Melt Temperature (typ.) 345°C653 °F · Mold Temperature (typ.) 100°C212 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 145 MJ/kg62,339 BTU/lb · Embodied Carbon (primary production) 7 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
Zenite GF30 vs Zenite LUB — frequently asked
Is Zenite GF30 stronger than Zenite LUB?
Yes. Zenite GF30 has a typical tensile strength of 150 MPa (21.8 ksi) against 110 MPa (16 ksi) for Zenite LUB — about 36% more.
Which grade does FabDigit quote by default, GF30 or LUB?
UF is the default Zenite condition in the FabDigit quote flow (neither GF30 nor LUB). 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, Zenite GF30 or Zenite LUB?
Zenite LUB, by a small margin. Both rate fair for machinability — 50/100 against 35/100 for Zenite GF30; for welding the order is Zenite GF30 first (poor, 30/100) then Zenite LUB (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Zenite GF30 and Zenite LUB 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.