CPVC vs CPVC 4120
Polymer · grade comparison
CPVC and CPVC 4120 are both polymer grades. Both yield at about 52 MPa — strength does not separate them.
CPVC vs CPVC 4120: 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.
Compressive Strength
Compressive Modulus
Flexural Strength
Shear Strength
Izod Impact, Notched
Bulk Modulus
Fracture Toughness (K_IC)
Same in both: Elastic (Young's) Modulus 3 GPa0.44 Msi · Shear Modulus 1.1 GPa0.16 Msi · Poisson's Ratio 0.38 · Tensile Strength (Ultimate) 55 MPa8 ksi · Yield Strength (0.2% offset) 52 MPa7.5 ksi · Elongation at Break 25% · Flexural Modulus 3 GPa0.44 Msi · Hardness, Shore D 82 Shore D · Hardness, Rockwell R 118 HRR
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (Saturation)
Refractive Index
Same in both: Water Absorption (24 h) 0.04%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Min Service Temperature
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Same in both: Thermal Conductivity 0.14 W/m·K0.08 BTU/hr·ft·°F · Specific Heat Capacity 950 J/kg·K0.23 BTU/lb·°F · Max Service Temperature (continuous) 93°C199 °F · Heat Deflection Temp. @ 0.45 MPa 118°C244 °F · Limiting Oxygen Index 60% · Max Service Temperature (short-term) 105°C221 °F
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Surface Resistivity
Same in both: Electrical Resistivity 1×10¹³ Ω·m3.94×10²⁰ µΩ·in · Dielectric Strength 22 kV/mm559 V/mil · Volume Resistivity 1×10¹⁵ Ω·cm · 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
Polishability
Mold Shrinkage
Mold Temperature (typ.)
Same in both: Formability (cold) 55 / 100 · Processing Melt Temperature (typ.) 200°C392 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 180 L/kg21.6 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Stiffness (E / density)
Same in both: Specific Strength (UTS / density) 36 kN·m/kg · Modulus of Resilience 451 kJ/m³ · 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 | CPVC | CPVC 4120 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Injection molding | Yes | — |
| Default condition | Unfilled | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | 0.5 mm | — |
| Best machined surface | Ra 0.8 µm | — |
| Chrome Plating (Plastic) | Yes | — |
| EMI Shielding Coating | Yes | — |
| Painting | Yes | — |
| Soft Touch Coating | Yes | — |
| Spray Painting | Yes | — |
| UV Coating | Yes | — |
CPVC vs CPVC 4120 — frequently asked
What is the difference between CPVC and CPVC 4120?
CPVC and CPVC 4120 are both polymer grades. Both yield at about 52 MPa — strength does not separate them.
Which is cheaper, CPVC or CPVC 4120?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, CPVC or CPVC 4120?
CPVC 4120, by a small margin. Both rate very good for machinability — 80/100 against 75/100 for CPVC; for welding the order is CPVC 4120 first (very good, 70/100) then CPVC (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in CPVC and CPVC 4120 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.