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EN 1.3558 Steel vs. 8021 Aluminum

EN 1.3558 steel belongs to the iron alloys classification, while 8021 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 1.3558 steel and the bottom bar is 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 770
160

Thermal Properties

Latent Heat of Fusion, J/g 240
400
Maximum Temperature: Mechanical, °C 490
170
Melting Completion (Liquidus), °C 1810
650
Melting Onset (Solidus), °C 1760
640
Specific Heat Capacity, J/kg-K 410
900
Thermal Conductivity, W/m-K 20
220
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
56
Electrical Conductivity: Equal Weight (Specific), % IACS 12
180

Otherwise Unclassified Properties

Base Metal Price, % relative 45
9.0
Density, g/cm3 9.3
2.8
Embodied Carbon, kg CO2/kg material 8.4
8.1
Embodied Energy, MJ/kg 130
150
Embodied Water, L/kg 90
1180

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
49
Strength to Weight: Axial, points 23
16
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 5.3
88
Thermal Shock Resistance, points 22
7.0

Alloy Composition

Aluminum (Al), % 0
98 to 98.8
Carbon (C), % 0.7 to 0.8
0
Chromium (Cr), % 3.9 to 4.3
0
Copper (Cu), % 0 to 0.3
0 to 0.050
Iron (Fe), % 73.7 to 77.6
1.2 to 1.7
Manganese (Mn), % 0 to 0.4
0
Molybdenum (Mo), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.4
0 to 0.15
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
0
Residuals, % 0
0 to 0.15