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Unfilled ABS

Unfilled ABS is a grade of ABS. It has the second highest ductility compared to the other variants of ABS. The graph bars on the material properties cards below compare unfilled 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 0.28 x 106 psi

Elongation at Break

20 %

Flexural Modulus

2.1 GPa 0.3 x 106 psi

Flexural Strength

97 MPa 14 x 103 psi

Fracture Toughness

2.0 MPa-m1/2 1.8 x 103 psi-in1/2

Impact Strength: Notched Izod

320 J/m 6.0 ft-lb/in

Poisson's Ratio


Tensile Strength: Ultimate (UTS)

41 MPa 5.9 x 103 psi

Thermal Properties

Glass Transition Temperature

100 °C 210 °F

Heat Deflection Temperature At 1.82 MPa (264 psi)

95 °C 200 °F

Heat Deflection Temperature At 455 kPa (66 psi)

100 °C 220 °F

Maximum Temperature: Autoignition

400 °C 740 °F

Maximum Temperature: Decomposition

390 °C 730 °F

Maximum Temperature: Mechanical

80 °C 180 °F

Specific Heat Capacity

1400 J/kg-K 0.33 BTU/lb-°F

Thermal Conductivity

0.23 W/m-K 0.13 BTU/h-ft-°F

Thermal Expansion

95 µm/m-K

Vicat Softening Temperature

100 °C 220 °F

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz


Dielectric Strength (Breakdown Potential)

16 kV/mm 0.61 V/mil

Electrical Resistivity Order of Magnitude

13 10x Ω-m

Otherwise Unclassified Properties


1.1 g/cm3 66 lb/ft3

Limiting Oxygen Index (LOI)

25 %

Water Absorption After 24 Hours

0.3 %

Water Absorption At Saturation

0.7 %

Common Calculations

Stiffness to Weight: Axial

1.0 points

Stiffness to Weight: Bending

39 points

Strength to Weight: Axial

11 points

Strength to Weight: Bending

25 points

Thermal Diffusivity

0.15 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