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PET vs. PA 6/12

Both PET and PA 6/12 are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is PET and the bottom bar is PA 6/12.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 3.5 to 11
1.7 to 2.2
Elongation at Break, % 2.5 to 70
30 to 120
Flexural Modulus, GPa 8.3 to 14
1.2 to 2.2
Tensile Strength: Ultimate (UTS), MPa 60 to 140
40 to 58

Thermal Properties

Maximum Temperature: Decomposition, °C 390
450
Melting Onset (Solidus), °C 260
210
Specific Heat Capacity, J/kg-K 1000 to 1150
1590

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.7
3.9 to 12

Otherwise Unclassified Properties

Density, g/cm3 1.4 to 1.6
1.1
Limiting Oxygen Index (LOI), % 21
25
Water Absorption At Saturation, % 0.24 to 0.5
3.0

Common Calculations

Stiffness to Weight: Axial, points 1.2 to 4.4
0.89 to 1.2
Stiffness to Weight: Bending, points 32 to 54
38 to 41
Strength to Weight: Axial, points 12 to 27
10 to 15
Strength to Weight: Bending, points 25 to 41
25 to 31