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Styrene Acrylonitrile (SAN)

SAN is a thermoplastic, further classified as a styrenic plastic. It has a moderately low ductility among the thermoplastics in the database.

The properties of SAN include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAN 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

Elongation at Break

2.5 %

Flexural Modulus

3.8 to 13 GPa 0.55 to 1.9 x 106 psi

Impact Strength: Notched Izod

23 to 60 J/m 0.44 to 1.1 ft-lb/in

Tensile Strength: Ultimate (UTS)

74 to 130 MPa 11 to 19 x 103 psi

Other Material Properties


1.1 to 1.4 g/cm3 67 to 87 lb/ft3

Specific Heat Capacity

1070 to 1380 J/kg-K 0.26 to 0.33 BTU/lb-°F

Common Calculations

Strength to Weight: Axial

19 to 25 points

Strength to Weight: Bending

36 to 40 points

Followup Questions

Further Reading

Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999

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