ASA vs. CAP

Both ASA and CAP are thermoplastics. There are 12 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is ASA and the bottom bar is CAP.

Acrylonitrile Styrene Acrylate (ASA)Cellulose Acetate Propionate (CAP)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		6.0
Elongation at Break, %		35 to 50

Tensile Strength: Ultimate (UTS), MPa		55
Tensile Strength: Ultimate (UTS), MPa		28 to 45

Thermal Properties

Glass Transition Temperature, °C		100
Glass Transition Temperature, °C		190

Specific Heat Capacity, J/kg-K		1300
Specific Heat Capacity, J/kg-K		1480

Thermal Conductivity, W/m-K		0.18
Thermal Conductivity, W/m-K		0.25

Thermal Expansion, µm/m-K		95
Thermal Expansion, µm/m-K		14

Vicat Softening Temperature, °C		96
Vicat Softening Temperature, °C		85 to 110

Electrical Properties

Electrical Resistivity Order of Magnitude, 10^x Ω-m		13
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Otherwise Unclassified Properties

Density, g/cm³		1.1
Density, g/cm³		1.2

Common Calculations

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		6.5 to 10

Strength to Weight: Bending, points		30
Strength to Weight: Bending, points		17 to 23

Thermal Diffusivity, mm²/s		0.13
Thermal Diffusivity, mm²/s		0.14