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FEP vs. ABS

Both FEP and ABS are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is FEP and the bottom bar is ABS.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.43
2.0 to 2.6
Elongation at Break, % 300
3.5 to 50
Flexural Modulus, GPa 0.6
2.1 to 7.6
Flexural Strength, MPa 24
72 to 97
Tensile Strength: Ultimate (UTS), MPa 20
37 to 110

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 50
76 to 110
Heat Deflection Temperature At 455 kPa (66 psi), °C 70
83 to 110
Thermal Expansion, µm/m-K 95
81 to 95

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 1.9
3.1 to 3.2
Dielectric Strength (Breakdown Potential), kV/mm 22
15 to 16

Otherwise Unclassified Properties

Density, g/cm3 2.1
1.0 to 1.4

Common Calculations

Stiffness to Weight: Axial, points 0.11
0.79 to 1.4
Stiffness to Weight: Bending, points 12
30 to 44
Strength to Weight: Axial, points 2.6
10 to 22
Strength to Weight: Bending, points 7.6
24 to 37
Thermal Shock Resistance, points 35
11 to 50