EPP CD vs EPP20
Polymer · EPP grade comparison
EPP CD and EPP20 are two grades of the same polymer grade, EPP: CD (cold drawn) versus EPP20 (EPP 20 g/L). The chemistry is identical, so every difference below comes from the condition. EPP CD is the stronger of the two: tensile strength 0.36 MPa (0.0522 ksi) against 0.25 MPa (0.0363 ksi) for EPP20, about 44% more. EPP20 is lighter (0.02 g/cm³ vs 0.03 g/cm³ for EPP CD) and EPP CD is stiffer (0 GPa vs 0 GPa).
EPP CDChoose it when strength drives the design.
EPP20Choose it when weight is the constraint.
EPP CD vs EPP20: 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
Tensile Strength (Ultimate)
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Compression Set (22 h, 70 °C)
Same in both: Poisson's Ratio 0.05 · Elongation at Break 15%
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 155°C311 °F · Glass Transition (Tg) -12°C10 °F · Water Absorption (24 h) 0.6% · Water Absorption (Saturation) 2%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Limiting Oxygen Index
Same in both: Specific Heat Capacity 1,900 J/kg·K0.45 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 90 µm/m·K50 µin/in·°F · Max Service Temperature (continuous) 95°C203 °F · Min Service Temperature -40°C-40 °F · Max Service Temperature (short-term) 130°C266 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
Surface Resistivity
Same in both: Dielectric Constant (1 MHz) 1.08 · Dissipation Factor (1 MHz) 4×10⁻⁴
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
UV / Weathering Resistance
Same in both: Corrosion Resistance 90 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Mold Shrinkage
Same in both: Weldability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 10%
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.
EPP CD vs EPP20 — frequently asked
Is EPP CD stronger than EPP20?
Yes. EPP CD has a typical tensile strength of 0.36 MPa (0.0522 ksi) against 0.25 MPa (0.0363 ksi) for EPP20 — about 44% more.
Which grade does FabDigit quote by default, CD or EPP20?
EPP30 is the default EPP condition in the FabDigit quote flow (neither CD nor EPP20). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose EPP CD over EPP20?
Pick EPP CD when strength drives the design. Pick EPP20 when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EPP CD and EPP20 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.