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PETG vs. PET

Both PETG and PET are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is PETG and the bottom bar is PET.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.2
3.5 to 11
Flexural Modulus, GPa 2.1
8.3 to 14
Impact Strength: Notched Izod, J/m 77
43 to 85
Tensile Strength: Ultimate (UTS), MPa 53
60 to 140

Thermal Properties

Glass Transition Temperature, °C 81
70
Melting Onset (Solidus), °C 140
260
Specific Heat Capacity, J/kg-K 1200
1000 to 1150

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 2.6
3.7

Otherwise Unclassified Properties

Density, g/cm3 1.3
1.4 to 1.6

Common Calculations

Stiffness to Weight: Axial, points 1.0
1.2 to 4.4
Stiffness to Weight: Bending, points 34
32 to 54
Strength to Weight: Axial, points 12
12 to 27
Strength to Weight: Bending, points 25
25 to 41