EPS 150 vs EPS 80
Polymer · grade comparison
EPS 150 and EPS 80 are both polymer grades. EPS 150 is the stronger of the two: tensile strength 0.3 MPa (0.0435 ksi) against 0.22 MPa (0.0319 ksi) for EPS 80, about 36% more. EPS 80 is lighter (0.02 g/cm³ vs 0.03 g/cm³ for EPS 150) and EPS 150 is stiffer (0.01 GPa vs 0 GPa). On the shop floor, EPS 150 welds better (fair vs poor).
EPS 150Choose it when strength drives the design, or when it will be welded.
EPS 80Choose it when weight is the constraint.
EPS 150 vs EPS 80: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Compression Set (22 h, 70 °C)
Same in both: Poisson's Ratio 0.1 · Elongation at Break 2%
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 100°C212 °F · Water Absorption (24 h) 1% · Water Absorption (Saturation) 3.5%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Max Service Temperature (continuous)
Vicat Softening Point (B50)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Thermal Expansion (CTE, 20–100 °C) 65 µm/m·K36.1 µin/in·°F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Same in both: Volume Resistivity 1×10¹⁵ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 12 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Processing Melt Temperature (typ.)
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Same in both: Embodied Carbon (primary production) 3.3 kg CO₂/kg · Typical Recycled Content 5%
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 | EPS 150 | EPS 80 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
EPS 150 vs EPS 80 — frequently asked
Is EPS 150 stronger than EPS 80?
Yes. EPS 150 has a typical tensile strength of 0.3 MPa (0.0435 ksi) against 0.22 MPa (0.0319 ksi) for EPS 80 — about 36% more.
Which is cheaper, EPS 150 or EPS 80?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, EPS 150 or EPS 80?
EPS 150. Its weldability rates fair (40/100) against poor (25/100) for EPS 80.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EPS 150 and EPS 80 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.