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8090 Aluminum vs. SAE-AISI M6 Steel

8090 aluminum belongs to the aluminum alloys classification, while SAE-AISI M6 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 8090 aluminum and the bottom bar is SAE-AISI M6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
77
Tensile Strength: Ultimate (UTS), MPa 340 to 490
840 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Melting Completion (Liquidus), °C 660
1560
Melting Onset (Solidus), °C 600
1510
Specific Heat Capacity, J/kg-K 960
440
Thermal Conductivity, W/m-K 95 to 160
17
Thermal Expansion, µm/m-K 24
12

Otherwise Unclassified Properties

Base Metal Price, % relative 18
39
Density, g/cm3 2.7
8.4
Embodied Carbon, kg CO2/kg material 8.6
8.0
Embodied Energy, MJ/kg 170
120
Embodied Water, L/kg 1160
160

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 34 to 49
28 to 73
Strength to Weight: Bending, points 39 to 50
24 to 45
Thermal Diffusivity, mm2/s 36 to 60
4.7
Thermal Shock Resistance, points 15 to 22
26 to 68

Alloy Composition


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Aluminum (Al), % 93 to 98.4
0
Carbon (C), % 0
0.75 to 0.85
Chromium (Cr), % 0 to 0.1
3.8 to 4.5
Cobalt (Co), % 0
11 to 13
Copper (Cu), % 1.0 to 1.6
0
Iron (Fe), % 0 to 0.3
68.8 to 74.6
Lithium (Li), % 2.2 to 2.7
0
Magnesium (Mg), % 0.6 to 1.3
0
Manganese (Mn), % 0 to 0.1
0.15 to 0.4
Molybdenum (Mo), % 0
4.5 to 5.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0.2 to 0.45
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
3.8 to 4.8
Vanadium (V), % 0
1.3 to 1.7
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.040 to 0.16
0
Residuals, % 0 to 0.15
0