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6061-T6 Aluminum vs. Unfilled PEEK

6061-T6 aluminum and unfilled PEEK belong to fundamentally different material chemistries. 6061-T6 aluminum is a metal, while unfilled PEEK is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 16 material properties with values for both materials. Properties with values for just one material (36, 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 6061-T6 aluminum and the bottom bar is unfilled PEEK.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
4.0
Elongation at Break, % 10
43
Shear Strength, MPa 210
50
Tensile Strength: Ultimate (UTS), MPa 310
97

Thermal Properties

Maximum Temperature: Mechanical, °C 170
330
Melting Onset (Solidus), °C 580
340
Specific Heat Capacity, J/kg-K 900
1700
Thermal Conductivity, W/m-K 170
0.25
Thermal Expansion, µm/m-K 24
52

Otherwise Unclassified Properties

Density, g/cm3 2.7
1.3

Common Calculations

Stiffness to Weight: Axial, points 14
1.7
Stiffness to Weight: Bending, points 50
40
Strength to Weight: Axial, points 31
20
Strength to Weight: Bending, points 37
36
Thermal Diffusivity, mm2/s 68
0.11
Thermal Shock Resistance, points 14
34