PP GF20 vs PP GF30
Polymer · grade comparison
PP GF20 and PP-GF30 are both polymer grades, compared here in the GF20 condition. PP-GF30 is the stronger of the two: yield strength 85 MPa (12.3 ksi) against 33 MPa (4.79 ksi) for PP GF20, about 158% more; tensile strength follows at 85 MPa (12.3 ksi) vs 65 MPa (9.43 ksi). In exchange, PP GF20 is the more ductile: elongation 4% versus 3% for PP-GF30, and PP-GF30 is harder (80 Shore D vs 72 Shore D). PP GF20 is lighter (1.04 g/cm³ vs 1.13 g/cm³ for PP-GF30) and PP-GF30 is stiffer (6 GPa vs 4.5 GPa). On the shop floor, PP GF20 welds better (excellent vs fair) and PP GF20 sits in a lower cost tier (budget, $) than PP-GF30 (standard, $$).
PP GF20Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PP-GF30Choose it when strength drives the design.
PP GF20 vs PP-GF30: 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
Bulk 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
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
Same in both: Melting Temperature (Tm) 165°C329 °F
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)
Limiting Oxygen Index
Max Service Temperature (short-term)
Electrical
Conductivity and insulation.
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · 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 5%
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 GF20 | PP-GF30 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Injection molding | Yes | — |
| 3D printing | Yes | — |
| Default condition | Homopolymer | — |
| Relative cost | $ Budget | $$ Standard |
| Min. machined wall | 0.5 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Chrome Plating (Plastic) | Yes | — |
| Conductive Coating | Yes | — |
| Dyeing (Nylon) | Yes | — |
| EMI Shielding Coating | Yes | — |
| Painting | Yes | — |
| Primer Coating | Yes | — |
| Soft Touch Coating | Yes | — |
| Spray Painting | Yes | — |
| Tinted Coating | Yes | — |
| UV Coating | Yes | — |
| Vacuum Metallization | Yes | — |
| Waterproof Coating | Yes | — |
PP GF20 vs PP-GF30 — frequently asked
Is PP-GF30 stronger than PP GF20?
Yes. PP-GF30 has a typical yield strength of 85 MPa (12.3 ksi) against 33 MPa (4.79 ksi) for PP GF20 — about 158% more. Tensile strength is 85 MPa (12.3 ksi) vs 65 MPa (9.43 ksi).
Which is cheaper, PP GF20 or PP-GF30?
PP GF20 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 GF20 or PP-GF30?
PP GF20, by a small margin. Both rate fair for machinability — 50/100 against 45/100 for PP-GF30; for welding the order is PP GF20 first (excellent, 92/100) then PP-GF30 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP GF20 and PP-GF30 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.