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Compare 6061 Aluminum to PEEK

6061 aluminum and PEEK belong to fundamentally different material chemistries. 6061 aluminum is a metal, while PEEK is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (23, 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.

Mechanical Properties in Common

Elastic (Young's, Tensile) Modulus, GPa

6061 Aluminum 71
PEEK 4.0 to 24

Elongation at Break, %

6061 Aluminum 8.0 to 20
PEEK 1.6 to 43

Strength to Weight Ratio, kN-m/kg

6061 Aluminum 47 to 150
PEEK 74 to 150

Tensile Strength: Ultimate (UTS), MPa

6061 Aluminum 130 to 420
PEEK 97 to 200

Thermal Properties in Common

Melting Onset (Solidus), °C

6061 Aluminum 580
PEEK 340

Specific Heat Capacity, J/kg-K

6061 Aluminum 900
PEEK 1390 to 1700

Thermal Conductivity, W/m-K

6061 Aluminum 170
PEEK 0.25 to 0.93

Thermal Diffusivity, m2/s

6061 Aluminum 68
PEEK 0.11 to 0.44

Thermal Expansion, µm/m-K

6061 Aluminum 22
PEEK 15 to 52

Electrical Properties in Common

Electrical Resistivity Order of Magnitude, 10x Ω-m

6061 Aluminum -7.0
PEEK 3.0 to 14

Otherwise Unclassified Properties in Common

Density, g/cm3

6061 Aluminum 2.7
PEEK 1.3 to 1.5