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3003 Aluminum vs. PETG

3003 aluminum and PETG belong to fundamentally different material chemistries. 3003 aluminum is a metal, while PETG is a polymeric material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 14 material properties with values for both materials. Properties with values for just one material (31, 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 3003 aluminum and the bottom bar is PETG.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
2.2
Shear Strength, MPa 68 to 130
62
Tensile Strength: Ultimate (UTS), MPa 110 to 240
53

Thermal Properties

Melting Onset (Solidus), °C 640
140
Specific Heat Capacity, J/kg-K 900
1200
Thermal Conductivity, W/m-K 180
0.29
Thermal Expansion, µm/m-K 23
68

Otherwise Unclassified Properties

Density, g/cm3 2.8
1.3

Common Calculations

Stiffness to Weight: Axial, points 14
1.0
Stiffness to Weight: Bending, points 50
34
Strength to Weight: Axial, points 11 to 24
12
Strength to Weight: Bending, points 18 to 30
25
Thermal Diffusivity, mm2/s 71
0.19
Thermal Shock Resistance, points 4.7 to 10
25