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SAE-AISI O7 Steel vs. EN AC-71100 Aluminum

SAE-AISI O7 steel belongs to the iron alloys classification, while EN AC-71100 aluminum belongs to the aluminum 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 SAE-AISI O7 steel and the bottom bar is EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
260

Thermal Properties

Latent Heat of Fusion, J/g 250
490
Melting Completion (Liquidus), °C 1480
580
Melting Onset (Solidus), °C 1430
520
Specific Heat Capacity, J/kg-K 470
860
Thermal Expansion, µm/m-K 12
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
32
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
97

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
9.5
Density, g/cm3 7.9
2.9
Embodied Carbon, kg CO2/kg material 2.3
7.4
Embodied Energy, MJ/kg 33
140
Embodied Water, L/kg 52
1010

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 24 to 74
25
Strength to Weight: Bending, points 22 to 46
31
Thermal Shock Resistance, points 23 to 70
12

Alloy Composition

Aluminum (Al), % 0
78.7 to 83.3
Carbon (C), % 1.1 to 1.3
0
Chromium (Cr), % 0.35 to 0.85
0
Copper (Cu), % 0 to 0.25
0 to 0.1
Iron (Fe), % 92.9 to 97.6
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0 to 1.0
0 to 0.15
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.6
7.5 to 9.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15