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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


1.1 g/cm3 67 lb/ft3

Dielectric Constant (Relative Permittivity) At 1 Hz


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