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PSU vs. PEEK

Both PSU and PEEK are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is PSU and the bottom bar is PEEK.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 95 to 180
120 to 300
Elongation at Break, % 2.0 to 52
1.6 to 43
Flexural Modulus, GPa 2.7 to 14
3.8 to 19
Flexural Strength, MPa 110 to 200
150 to 330
Impact Strength: Notched Izod, J/m 59 to 100
78 to 120
Tensile Strength: Ultimate (UTS), MPa 70 to 140
97 to 200

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 180 to 200
160 to 300
Specific Heat Capacity, J/kg-K 910 to 1000
1390 to 1700
Thermal Expansion, µm/m-K 25 to 57
15 to 52

Otherwise Unclassified Properties

Density, g/cm3 1.2 to 1.6
1.3 to 1.5
Water Absorption At Saturation, % 0.4 to 0.6
0.22 to 0.5

Common Calculations

Strength to Weight: Axial, points 16 to 25
20 to 41
Strength to Weight: Bending, points 30 to 40
36 to 55