C578 Type VI vs XPS 300
Polymer · grade comparison
C578 Type VI and XPS 300 are both polymer grades. C578 Type VI is the stronger of the two: tensile strength 0.48 MPa (0.0696 ksi) against 0.45 MPa (0.0653 ksi) for XPS 300, about 7% more. C578 Type VI is lighter (0.03 g/cm³ vs 0.04 g/cm³ for XPS 300) and C578 Type VI is stiffer (0.02 GPa vs 0.02 GPa).
C578 Type VIChoose it when strength drives the design, or when weight is the constraint.
C578 Type VI vs XPS 300: 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)
Compressive Strength
Compressive Modulus
Flexural Strength
Shear Strength
Yield Strength (0.2% offset)
Elongation at Break
Flexural Modulus
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Same in both: Glass Transition (Tg) 100°C212 °F · Water Absorption (Saturation) 0.5%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Max Service Temperature (continuous)
Limiting Oxygen Index
Vicat Softening Point (B50)
Same in both: Thermal Expansion (CTE, 20–100 °C) 70 µm/m·K38.9 µin/in·°F · Min Service Temperature -50°C-58 °F · Max Service Temperature (short-term) 85°C185 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Dielectric Constant (1 MHz) 1.07 · Volume Resistivity 1×10¹⁶ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 85 / 100 · UV / Weathering Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Weldability
Same in both: Machinability 92 / 100 · Processing Melt Temperature (typ.) 190°C374 °F
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)
Specific Stiffness (E / density)
Same in both: Thermal Diffusivity 0.7 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 | C578 Type VI | XPS 300 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
C578 Type VI vs XPS 300 — frequently asked
Is C578 Type VI stronger than XPS 300?
Yes. C578 Type VI has a typical tensile strength of 0.48 MPa (0.0696 ksi) against 0.45 MPa (0.0653 ksi) for XPS 300 — about 7% more.
Which is cheaper, C578 Type VI or XPS 300?
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 VI over XPS 300?
Pick C578 Type VI when strength drives the design, or when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C578 Type VI and XPS 300 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.