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6101 Aluminum vs. SAE-AISI M33 Steel

6101 aluminum belongs to the aluminum alloys classification, while SAE-AISI M33 steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (9, 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 6101 aluminum and the bottom bar is SAE-AISI M33 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
78

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Melting Completion (Liquidus), °C 650
1550
Melting Onset (Solidus), °C 620
1500
Specific Heat Capacity, J/kg-K 900
440
Thermal Conductivity, W/m-K 220 to 230
20
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
32
Density, g/cm3 2.7
8.2
Embodied Carbon, kg CO2/kg material 8.3
7.7
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1190
150

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Thermal Diffusivity, mm2/s 89 to 93
5.5

Alloy Composition

Aluminum (Al), % 97.6 to 99.4
0
Boron (B), % 0 to 0.060
0
Carbon (C), % 0
0.85 to 0.92
Chromium (Cr), % 0 to 0.030
3.5 to 4.0
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.5
71.4 to 76.3
Magnesium (Mg), % 0.35 to 0.8
0
Manganese (Mn), % 0 to 0.030
0.15 to 0.4
Molybdenum (Mo), % 0
9.0 to 10
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.3 to 0.7
0.15 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
1.3 to 2.1
Vanadium (V), % 0
1.0 to 1.4
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.1
0