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6018 Aluminum vs. SAE-AISI M1 Steel

6018 aluminum belongs to the aluminum alloys classification, while SAE-AISI M1 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 6018 aluminum and the bottom bar is SAE-AISI M1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 290 to 300
730 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Melting Completion (Liquidus), °C 640
1560
Melting Onset (Solidus), °C 570
1510
Specific Heat Capacity, J/kg-K 890
450
Thermal Conductivity, W/m-K 170
29
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
18
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 8.2
7.0
Embodied Energy, MJ/kg 150
99
Embodied Water, L/kg 1180
98

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 48
24
Strength to Weight: Axial, points 28 to 29
25 to 73
Strength to Weight: Bending, points 34 to 35
22 to 45
Thermal Diffusivity, mm2/s 65
8.0
Thermal Shock Resistance, points 13
23 to 66

Alloy Composition

Aluminum (Al), % 93.1 to 97.8
0
Bismuth (Bi), % 0.4 to 0.7
0
Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0 to 0.1
3.5 to 4.0
Copper (Cu), % 0.15 to 0.4
0 to 0.25
Iron (Fe), % 0 to 0.7
81 to 84.8
Lead (Pb), % 0.4 to 1.2
0
Magnesium (Mg), % 0.6 to 1.2
0
Manganese (Mn), % 0.3 to 0.8
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.2
0.2 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.0 to 1.4
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0