PP-T20 vs TPO
Polymer · grade comparison
PP-T20 and TPO are both polymer grades. PP-T20 is the stronger of the two: yield strength 29 MPa (4.21 ksi) against 12 MPa (1.74 ksi) for TPO, about 142% more; tensile strength follows at 30 MPa (4.35 ksi) vs 15 MPa (2.18 ksi). In exchange, TPO is the more ductile: elongation 400% versus 12% for PP-T20, and PP-T20 is harder (72 Shore D vs 45 Shore D). TPO is lighter (0.89 g/cm³ vs 1.05 g/cm³ for PP-T20) and PP-T20 is stiffer (2.4 GPa vs 0.6 GPa). On the shop floor, TPO welds better (80 vs 70 out of 100) and PP-T20 sits in a lower cost tier (budget, $) than TPO (standard, $$).
PP-T20Choose it when strength drives the design, or when the part sees heat.
TPOChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PP-T20 vs TPO: 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)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Hardness, Shore A
Tear Strength
Compression Set (22 h, 70 °C)
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
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)
Min Service Temperature
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Max Service Temperature (short-term)
Same in both: Limiting Oxygen Index 18%
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Surface Resistivity
Same in both: Comparative Tracking Index (CTI) 600 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
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 10%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
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 | PP-T20 | TPO |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PP-T20 vs TPO — frequently asked
Is PP-T20 stronger than TPO?
Yes. PP-T20 has a typical yield strength of 29 MPa (4.21 ksi) against 12 MPa (1.74 ksi) for TPO — about 142% more. Tensile strength is 30 MPa (4.35 ksi) vs 15 MPa (2.18 ksi).
Which is cheaper, PP-T20 or TPO?
PP-T20 is the lower-cost material: it sits in the budget tier ($) while TPO is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, PP-T20 or TPO?
PP-T20. Its machinability rates good (58/100) against fair (50/100) for TPO; for welding the order is TPO first (very good, 80/100) then PP-T20 (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP-T20 and TPO 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.