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2218 Aluminum vs. SAE-AISI F2 Steel

2218 aluminum belongs to the aluminum alloys classification, while SAE-AISI F2 steel belongs to the iron alloys. There are 23 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 2218 aluminum and the bottom bar is SAE-AISI F2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 330 to 430
710 to 2360

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Melting Completion (Liquidus), °C 640
1520
Melting Onset (Solidus), °C 510
1470
Specific Heat Capacity, J/kg-K 870
460
Thermal Conductivity, W/m-K 140
42
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 3.1
8.1
Embodied Carbon, kg CO2/kg material 8.2
2.3
Embodied Energy, MJ/kg 150
32
Embodied Water, L/kg 1130
50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 30 to 39
24 to 81
Strength to Weight: Bending, points 34 to 41
22 to 49
Thermal Diffusivity, mm2/s 52
11
Thermal Shock Resistance, points 15 to 19
21 to 71

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
Carbon (C), % 0
1.2 to 1.4
Chromium (Cr), % 0 to 0.1
0.2 to 0.4
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 1.0
92.6 to 95.4
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0.1 to 0.5
Nickel (Ni), % 1.7 to 2.3
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.9
0.1 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
3.0 to 4.5
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0