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EN 1.8151 Steel vs. 5021 Aluminum

EN 1.8151 steel belongs to the iron alloys classification, while 5021 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 EN 1.8151 steel and the bottom bar is 5021 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
26
Tensile Strength: Ultimate (UTS), MPa 670 to 1940
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 50
140
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
35
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 1.8
8.6
Embodied Energy, MJ/kg 25
150
Embodied Water, L/kg 49
1180

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 24 to 70
30 to 32
Strength to Weight: Bending, points 22 to 45
37
Thermal Diffusivity, mm2/s 14
57
Thermal Shock Resistance, points 20 to 58
13 to 14

Alloy Composition


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Aluminum (Al), % 0
95.2 to 97.7
Carbon (C), % 0.4 to 0.5
0
Chromium (Cr), % 0.4 to 0.8
0 to 0.15
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 95.9 to 97.2
0 to 0.5
Magnesium (Mg), % 0
2.2 to 2.8
Manganese (Mn), % 0.6 to 0.9
0.1 to 0.5
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 1.3 to 1.7
0 to 0.4
Sulfur (S), % 0 to 0.025
0
Vanadium (V), % 0.1 to 0.2
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15