PP-R AB vs PP-R GF20
Polymer · PP-R grade comparison
PP-R AB and PP-R GF20 are two grades of the same polymer grade, PP-R: AB (as built (as printed)) versus GF20 (PP-R/GF ≈20%). The chemistry is identical, so every difference below comes from the condition. PP-R GF20 is the stronger of the two: tensile strength 45 MPa (6.53 ksi) against 25 MPa (3.63 ksi) for PP-R AB, about 80% more. In exchange, PP-R AB is the more ductile: elongation 550% versus 5% for PP-R GF20. PP-R AB is lighter (0.91 g/cm³ vs 1.03 g/cm³ for PP-R GF20) and PP-R GF20 is stiffer (3.2 GPa vs 0.88 GPa). On the shop floor, PP-R AB machines more easily (good vs fair).
PP-R ABChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PP-R GF20Choose it when strength drives the design.
PP-R AB vs PP-R GF20: 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)
Yield Strength (0.2% offset)
Elongation at Break
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Same in both: Shear Modulus 0.3 GPa0.04 Msi · Bulk Modulus 3 GPa0.42 Msi · Poisson's Ratio 0.43 · Compressive Strength 40 MPa5.8 ksi · Compressive Modulus 0.9 GPa0.13 Msi
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 148°C298 °F · Glass Transition (Tg) -12°C10 °F · Water Absorption (24 h) 0.02% · Water Absorption (Saturation) 0.1% · Refractive Index 1.49
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Same in both: Thermal Conductivity 0.24 W/m·K0.14 BTU/hr·ft·°F · Specific Heat Capacity 1,900 J/kg·K0.45 BTU/lb·°F · Max Service Temperature (continuous) 70°C158 °F · Min Service Temperature -10°C14 °F · Heat Deflection Temp. @ 0.45 MPa 80°C176 °F · Limiting Oxygen Index 18% · Max Service Temperature (short-term) 95°C203 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 27 kV/mm686 V/mil · Dielectric Constant (1 MHz) 2.3 · Dissipation Factor (1 MHz) 4×10⁻⁴ · 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).
Same in both: Corrosion Resistance 90 / 100 · UV / Weathering Resistance 20 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Same in both: Polishability 45 / 100 · Melt Flow Rate 0.3 g/10 min · Processing Melt Temperature (typ.) 215°C419 °F · Mold Temperature (typ.) 40°C104 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 78 MJ/kg33,534 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 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.
PP-R AB vs PP-R GF20 — frequently asked
Is PP-R GF20 stronger than PP-R AB?
Yes. PP-R GF20 has a typical tensile strength of 45 MPa (6.53 ksi) against 25 MPa (3.63 ksi) for PP-R AB — about 80% more.
Which grade does FabDigit quote by default, AB or GF20?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, PP-R AB or PP-R GF20?
PP-R AB. Its machinability rates good (60/100) against fair (50/100) for PP-R GF20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP-R AB and PP-R GF20 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.