Acrylonitrile Styrene Acrylate (ASA)
ASA is a thermoplastic, further classified as a styrenic plastic. The graph bars on the material properties cards below compare ASA to: styrenic plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
2.6 GPa 0.38 x 106 psi
Elongation at Break
6.0 %
Shear Modulus
0.8 GPa 0.12 x 106 psi
Tensile Strength: Ultimate (UTS)
55 MPa 8.0 x 103 psi
Thermal Properties
Glass Transition Temperature
100 °C 210 °F
Specific Heat Capacity
1300 J/kg-K 0.31 BTU/lb-°F
Thermal Conductivity
0.18 W/m-K 0.1 BTU/h-ft-°F
Thermal Expansion
95 µm/m-K
Vicat Softening Temperature
96 °C 200 °F
Other Material Properties
Density
1.1 g/cm3 67 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 Hz
3.7
Electrical Resistivity Order of Magnitude
13 10x Ω-m
Common Calculations
Stiffness to Weight: Axial
1.3 points
Stiffness to Weight: Bending
43 points
Strength to Weight: Axial
14 points
Strength to Weight: Bending
30 points
Thermal Diffusivity
0.13 mm2/s
Thermal Shock Resistance
16 points
Followup Questions
Further Reading
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999