# High Impact ABS

High impact ABS is a grade of ABS. It has the lowest strength compared to the other variants of ABS. The graph bars on the material properties cards below compare high impact ABS 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

2.0 *GPa* 0.29 *x 10 ^{6} psi*

Elongation at Break

13 *%*

Flexural Modulus

2.3 *GPa* 0.34 *x 10 ^{6} psi*

Flexural Strength

72 *MPa* 10 *x 10 ^{3} psi*

Impact Strength: Notched Izod

370 *J/m* 7.0 *ft-lb/in*

Rockwell R Hardness

100

Tensile Strength: Ultimate (UTS)

37 *MPa* 5.4 *x 10 ^{3} psi*

## Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi)

91 *°C* 200 *°F*

Heat Deflection Temperature At 455 kPa (66 psi)

99 *°C* 210 *°F*

Thermal Expansion

95 *µm/m-K*

## Other Material Properties

Density

1.0 *g/cm ^{3}* 64

*lb/ft*

^{3}Dielectric Constant (Relative Permittivity) At 1 Hz

3.2

Dielectric Strength (Breakdown Potential)

15 *kV/mm* 0.57 *V/mil*

## Common Calculations

Stiffness to Weight: Axial

1.1 *points*

Stiffness to Weight: Bending

41 *points*

Strength to Weight: Axial

10 *points*

Strength to Weight: Bending

24 *points*

Thermal Shock Resistance

14 *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