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SAE-AISI O2 Steel vs. 5252 Aluminum

SAE-AISI O2 steel belongs to the iron alloys classification, while 5252 aluminum belongs to the aluminum alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 O2 steel and the bottom bar is 5252 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
25
Tensile Strength: Ultimate (UTS), MPa 640 to 2050
230 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1410
610
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 43
140
Thermal Expansion, µm/m-K 11
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.8
8.7
Embodied Energy, MJ/kg 26
160
Embodied Water, L/kg 50
1190

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 23 to 73
23 to 30
Strength to Weight: Bending, points 21 to 46
31 to 36
Thermal Diffusivity, mm2/s 12
57
Thermal Shock Resistance, points 22 to 70
10 to 13

Alloy Composition

Aluminum (Al), % 0
96.6 to 97.8
Carbon (C), % 0.85 to 1.0
0
Chromium (Cr), % 0 to 0.5
0
Copper (Cu), % 0 to 0.25
0 to 0.1
Iron (Fe), % 95 to 97.8
0 to 0.1
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 1.4 to 1.8
0 to 0.1
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 0.5
0 to 0.080
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0 to 0.3
0 to 0.050
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.1