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6066 Aluminum vs. SAE-AISI 1080 Steel

6066 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1080 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 6066 aluminum and the bottom bar is SAE-AISI 1080 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 7.8 to 17
11
Fatigue Strength, MPa 94 to 130
300 to 360
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 95 to 240
460 to 520
Tensile Strength: Ultimate (UTS), MPa 160 to 400
770 to 870
Tensile Strength: Yield (Proof), MPa 93 to 360
480 to 590

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 560
1410
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 150
51
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
9.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
11

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1160
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 52
80 to 84
Resilience: Unit (Modulus of Resilience), kJ/m3 61 to 920
610 to 920
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 16 to 39
27 to 31
Strength to Weight: Bending, points 23 to 43
24 to 26
Thermal Diffusivity, mm2/s 61
14
Thermal Shock Resistance, points 6.9 to 17
25 to 29

Alloy Composition

Aluminum (Al), % 93 to 97
0
Carbon (C), % 0
0.75 to 0.88
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0.7 to 1.2
0
Iron (Fe), % 0 to 0.5
98.1 to 98.7
Magnesium (Mg), % 0.8 to 1.4
0
Manganese (Mn), % 0.6 to 1.1
0.6 to 0.9
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.9 to 1.8
0
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0