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201.0 Aluminum vs. SAE-AISI S2 Steel

201.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI S2 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, 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 201.0 aluminum and the bottom bar is SAE-AISI S2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72
Tensile Strength: Ultimate (UTS), MPa 370 to 470
670 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 120
44
Thermal Expansion, µm/m-K 19
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30 to 33
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 97
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 38
2.6
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.7
2.1
Embodied Energy, MJ/kg 160
30

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 33 to 42
24 to 69
Strength to Weight: Bending, points 37 to 44
22 to 44
Thermal Diffusivity, mm2/s 45
12
Thermal Shock Resistance, points 19 to 25
23 to 68

Alloy Composition

Aluminum (Al), % 92.1 to 95.1
0
Carbon (C), % 0
0.4 to 0.55
Copper (Cu), % 4.0 to 5.2
0 to 0.25
Iron (Fe), % 0 to 0.15
96 to 98.1
Magnesium (Mg), % 0.15 to 0.55
0
Manganese (Mn), % 0.2 to 0.5
0.3 to 0.5
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0.9 to 1.2
Silver (Ag), % 0.4 to 1.0
0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.15 to 0.35
0
Vanadium (V), % 0
0 to 0.5
Residuals, % 0 to 0.1
0