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PEEK vs. UHMW-PE

Both PEEK and UHMW-PE are thermoplastics. There are 14 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is PEEK and the bottom bar is UHMW-PE.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 4.0 to 24
0.8
Elongation at Break, % 1.6 to 43
400
Tensile Strength: Ultimate (UTS), MPa 97 to 200
49

Thermal Properties

Melting Onset (Solidus), °C 340
130
Specific Heat Capacity, J/kg-K 1390 to 1700
1750
Thermal Conductivity, W/m-K 0.25 to 0.93
0.41
Thermal Expansion, µm/m-K 15 to 52
180

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.5
0.94

Common Calculations

Stiffness to Weight: Axial, points 1.5 to 10
0.47
Stiffness to Weight: Bending, points 36 to 73
33
Strength to Weight: Axial, points 20 to 41
14
Strength to Weight: Bending, points 36 to 55
32
Thermal Diffusivity, m2/s 0.1 to 0.51
0.25
Thermal Shock Resistance, points 34 to 57
25