PESU vs PSU-GF20
Polymer · grade comparison
PESU and PSU-GF20 are both polymer grades. PSU-GF20 is the stronger of the two: tensile strength 100 MPa (14.5 ksi) against 85 MPa (12.3 ksi) for PESU, about 18% more. In exchange, PESU is the more ductile: elongation 45% versus 3% for PSU-GF20. PSU-GF20 is stiffer (6.2 GPa vs 2.6 GPa) and PESU runs hotter in service (180°C vs 160°C continuous). On the shop floor, PESU machines more easily (65 vs 55 out of 100) and PESU welds better (very good vs fair).
PESUChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
PSU-GF20Choose it when strength drives the design.
PESU vs PSU-GF20: 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
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
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 0.39
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
Light Transmission
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)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Same in both: Dielectric Strength 17 kV/mm432 V/mil · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 150 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Melt Flow Rate
Mold Temperature (typ.)
Same in both: Processing Melt Temperature (typ.) 355°C671 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: 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 | PESU | PSU-GF20 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PESU vs PSU-GF20 — frequently asked
Is PSU-GF20 stronger than PESU?
Yes. PSU-GF20 has a typical tensile strength of 100 MPa (14.5 ksi) against 85 MPa (12.3 ksi) for PESU — about 18% more.
Which is cheaper, PESU or PSU-GF20?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, PESU or PSU-GF20?
PESU, by a small margin. Both rate good for machinability — 65/100 against 55/100 for PSU-GF20; for welding the order is PESU first (very good, 70/100) then PSU-GF20 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PESU and PSU-GF20 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.