PP-GF30 vs PP-T20
Polymer · grade comparison
PP-GF30 and PP-T20 are both polymer grades. PP-GF30 is the stronger of the two: yield strength 85 MPa (12.3 ksi) against 29 MPa (4.21 ksi) for PP-T20, about 193% more; tensile strength follows at 85 MPa (12.3 ksi) vs 30 MPa (4.35 ksi). In exchange, PP-T20 is the more ductile: elongation 12% versus 3% for PP-GF30, and PP-GF30 is harder (80 Shore D vs 72 Shore D). PP-T20 is lighter (1.05 g/cm³ vs 1.13 g/cm³ for PP-GF30) and PP-GF30 is stiffer (6 GPa vs 2.4 GPa). On the shop floor, PP-T20 machines more easily (good vs fair), PP-T20 welds better (very good vs fair), and PP-T20 sits in a lower cost tier (budget, $) than PP-GF30 (standard, $$).
PP-GF30Choose it when strength drives the design, or when the part sees heat.
PP-T20Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PP-GF30 vs PP-T20: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Shear Modulus
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Same in both: Melting Temperature (Tm) 165°C329 °F · Water Absorption (Saturation) 0.15%
Thermal
How each material carries heat and how hot it can run.
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)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.27 W/m·K0.16 BTU/hr·ft·°F
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
Same in both: UV / Weathering Resistance 25 / 100
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
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Same in both: Thermal Diffusivity 0.2 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 | PP-GF30 | PP-T20 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PP-GF30 vs PP-T20 — frequently asked
Is PP-GF30 stronger than PP-T20?
Yes. PP-GF30 has a typical yield strength of 85 MPa (12.3 ksi) against 29 MPa (4.21 ksi) for PP-T20 — about 193% more. Tensile strength is 85 MPa (12.3 ksi) vs 30 MPa (4.35 ksi).
Which is cheaper, PP-GF30 or PP-T20?
PP-T20 is the lower-cost material: it sits in the budget tier ($) while PP-GF30 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-GF30 or PP-T20?
PP-T20. Its machinability rates good (58/100) against fair (45/100) for PP-GF30; for welding the order is PP-T20 first (very good, 70/100) then PP-GF30 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP-GF30 and PP-T20 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.