PSU GF20 vs PSU GF30
Polymer · grade comparison
PSU-GF20 and PSU-GF30 are both polymer grades. PSU-GF30 is the stronger of the two: tensile strength 108 MPa (15.7 ksi) against 100 MPa (14.5 ksi) for PSU-GF20, about 8% more. In exchange, PSU-GF20 is the more ductile: elongation 3% versus 2.5% for PSU-GF30. PSU-GF20 is lighter (1.38 g/cm³ vs 1.49 g/cm³ for PSU-GF30) and PSU-GF30 is stiffer (8.8 GPa vs 6.2 GPa).
PSU-GF20Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PSU-GF30Choose it when strength drives the design.
PSU-GF20 vs PSU-GF30: 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
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Rockwell M
Fracture Toughness (K_IC)
Same in both: Hardness, Rockwell R 122 HRR
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Same in both: Water Absorption (24 h) 0.22% · Water Absorption (Saturation) 0.6%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
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: Min Service Temperature -100°C-148 °F · Limiting Oxygen Index 32% · Max Service Temperature (short-term) 190°C374 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Volume Resistivity
Same in both: Dissipation Factor (1 MHz) 0.006 · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 150 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Polishability
Melt Flow Rate
Mold Temperature (typ.)
Same in both: Weldability 40 / 100 · Formability (cold) 15 / 100 · Mold Shrinkage 0.3% · Processing Melt Temperature (typ.) 355°C671 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Same in both: Embodied Carbon (primary production) 7.5 kg CO₂/kg · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Stiffness (E / density)
Same in both: Specific Strength (UTS / density) 72 kN·m/kg · Thermal Diffusivity 0.2 mm²/s · Thermal Shock Resistance Index 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.
Manufacturing and finishing
| Capability | PSU-GF20 | PSU-GF30 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PSU-GF20 vs PSU-GF30 — frequently asked
Is PSU-GF30 stronger than PSU-GF20?
Yes. PSU-GF30 has a typical tensile strength of 108 MPa (15.7 ksi) against 100 MPa (14.5 ksi) for PSU-GF20 — about 8% more.
Which is cheaper, PSU-GF20 or PSU-GF30?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, PSU-GF20 or PSU-GF30?
PSU-GF20. Its machinability rates good (55/100) against fair (50/100) for PSU-GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PSU-GF20 and PSU-GF30 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.