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
0.41
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
3.2
Dielectric Strength (Breakdown Potential)
16 kV/mm 0.61 V/mil
Electrical Resistivity Order of Magnitude
13 10x Ω-m
Otherwise Unclassified Properties
Density
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