PP-B vs PP-C
Polymer · grade comparison
PP-B and PP-C are both polymer grades. Both yield at about 24 MPa — strength does not separate them. PP-B is stiffer (1.2 GPa vs 1.1 GPa). On the shop floor, PP-B forms better (very good vs good).
PP-B vs PP-C: 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)
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Same in both: Elongation at Break 350%
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Same in both: Melting Temperature (Tm) 164°C327 °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 Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Min Service Temperature
Vicat Softening Point (B50)
Same in both: Max Service Temperature (continuous) 95°C203 °F · Heat Deflection Temp. @ 0.45 MPa 88°C190 °F · Heat Deflection Temp. @ 1.8 MPa 55°C131 °F · Limiting Oxygen Index 18% · Max Service Temperature (short-term) 120°C248 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 25 kV/mm635 V/mil · Dielectric Constant (1 MHz) 2.25 · 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 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Mold Shrinkage
Melt Flow Rate
Same in both: Weldability 88 / 100 · Polishability 40 / 100 · Processing Melt Temperature (typ.) 230°C446 °F · Mold Temperature (typ.) 40°C104 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Water
Same in both: Embodied Energy (primary production) 78 MJ/kg33,534 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Typical Recycled Content 5%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Same in both: Thermal Diffusivity 0.1 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-B | PP-C |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PP-B vs PP-C — frequently asked
What is the difference between PP-B and PP-C?
PP-B and PP-C are both polymer grades. Both yield at about 24 MPa — strength does not separate them. PP-B is stiffer (1.2 GPa vs 1.1 GPa).
Which is cheaper, PP-B or PP-C?
Both sit in the same relative cost tier ($, budget); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, PP-B or PP-C?
PP-C, by a small margin. Both rate good for machinability — 65/100 against 60/100 for PP-B.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PP-B and PP-C 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.