CA vs CAB
Polymer · grade comparison
CA and CAB are both polymer grades. CA is the stronger of the two: yield strength 35 MPa (5.08 ksi) against 28 MPa (4.06 ksi) for CAB, about 25% more; tensile strength follows at 40 MPa (5.8 ksi) vs 32 MPa (4.64 ksi). In exchange, CAB is the more ductile: elongation 60% versus 30% for CA. CAB is lighter (1.19 g/cm³ vs 1.3 g/cm³ for CA) and CA is stiffer (1.6 GPa vs 1.4 GPa).
CAChoose it when strength drives the design.
CABChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
CA vs CAB: 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
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell R
Same in both: Fracture Toughness (K_IC) 2 MPa·√m1.8 ksi·√in
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
Light Transmission
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Specific Heat Capacity 1,600 J/kg·K0.38 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 130 µm/m·K72.2 µin/in·°F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Volume Resistivity
Surface Resistivity
Same in both: 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.
Weldability
Formability (cold)
Melt Flow Rate
Same in both: Machinability 75 / 100 · Polishability 85 / 100 · Mold Shrinkage 0.5% · Processing Melt Temperature (typ.) 200°C392 °F · Mold Temperature (typ.) 55°C131 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Same in both: Specific Stiffness (E / density) 1.2 MN·m/kg · 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 | CA | CAB |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
CA vs CAB — frequently asked
Is CA stronger than CAB?
Yes. CA has a typical yield strength of 35 MPa (5.08 ksi) against 28 MPa (4.06 ksi) for CAB — about 25% more. Tensile strength is 40 MPa (5.8 ksi) vs 32 MPa (4.64 ksi).
Which is cheaper, CA or CAB?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, CA or CAB?
CAB. Its weldability rates good (60/100) against good (55/100) for CA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CA and CAB 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.