PP-B vs PP-GF30
Polymer · grade comparison
PP-B and PP-GF30 are both polymer grades. PP-GF30 is the stronger of the two: yield strength 85 MPa (12.3 ksi) against 24 MPa (3.48 ksi) for PP-B, about 3.5 times as much; tensile strength follows at 85 MPa (12.3 ksi) vs 25 MPa (3.63 ksi). In exchange, PP-B is the more ductile: elongation 350% versus 3% for PP-GF30, and PP-GF30 is harder (80 Shore D vs 66 Shore D). PP-B is lighter (0.91 g/cm³ vs 1.13 g/cm³ for PP-GF30) and PP-GF30 is stiffer (6 GPa vs 1.2 GPa). On the shop floor, PP-B machines more easily (good vs fair), PP-B welds better (excellent vs fair), and PP-B sits in a lower cost tier (budget, $) than PP-GF30 (standard, $$).
PP-BChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PP-GF30Choose it when strength drives the design, or when the part sees heat.
PP-B 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
Melting Temperature (Tm)
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
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).
Same in both: Corrosion Resistance 90 / 100 · 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
Same in both: Typical Recycled Content 5%
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-B | PP-GF30 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PP-B vs PP-GF30 — frequently asked
Is PP-GF30 stronger than PP-B?
Yes. PP-GF30 has a typical yield strength of 85 MPa (12.3 ksi) against 24 MPa (3.48 ksi) for PP-B — about 3.5 times as much. Tensile strength is 85 MPa (12.3 ksi) vs 25 MPa (3.63 ksi).
Which is cheaper, PP-B or PP-GF30?
PP-B 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-B or PP-GF30?
PP-B. Its machinability rates good (60/100) against fair (45/100) for PP-GF30; for welding the order is PP-B first (excellent, 88/100) then PP-GF30 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP-B 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.