C578 Type X vs EPS 150
Polymer · grade comparison
C578 Type X and EPS 150 are both polymer grades. C578 Type X is lighter (0.02 g/cm³ vs 0.03 g/cm³ for EPS 150) and EPS 150 is stiffer (0.01 GPa vs 0.01 GPa).
C578 Type XChoose it when weight is the constraint.
C578 Type X vs EPS 150: 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
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Yield Strength (0.2% offset)
Elongation at Break
Compression Set (22 h, 70 °C)
Same in both: Shear Modulus 0 GPa5.8×10⁻⁴ Msi · Tensile Strength (Ultimate) 0.3 MPa0.04 ksi · Shear Strength 0.14 MPa0.02 ksi
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Glass Transition (Tg) 100°C212 °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)
Min Service Temperature
Limiting Oxygen Index
Max Service Temperature (short-term)
Vicat Softening Point (B50)
Same in both: Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Volume Resistivity
Same in both: Dissipation Factor (1 MHz) 3×10⁻⁴
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
Formability (cold)
Processing Melt Temperature (typ.)
Weldability
Mold Shrinkage
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Embodied Water
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Thermal Diffusivity
Same in both: Specific Stiffness (E / density) 0.3 MN·m/kg · 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 | C578 Type X | EPS 150 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
C578 Type X vs EPS 150 — frequently asked
What is the difference between C578 Type X and EPS 150?
C578 Type X and EPS 150 are both polymer grades. C578 Type X is lighter (0.02 g/cm³ vs 0.03 g/cm³ for EPS 150) and EPS 150 is stiffer (0.01 GPa vs 0.01 GPa).
Which is cheaper, C578 Type X or EPS 150?
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.
When should I choose C578 Type X over EPS 150?
Pick C578 Type X when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C578 Type X and EPS 150 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.