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EN 1.3558 Steel vs. 5251 Aluminum

EN 1.3558 steel belongs to the iron alloys classification, while 5251 aluminum belongs to the aluminum alloys. There are 25 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 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
44 to 79
Elastic (Young's, Tensile) Modulus, GPa 210
68
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 80
26
Tensile Strength: Ultimate (UTS), MPa 770
180 to 280

Thermal Properties

Latent Heat of Fusion, J/g 240
400
Maximum Temperature: Mechanical, °C 490
180
Melting Completion (Liquidus), °C 1810
650
Melting Onset (Solidus), °C 1760
610
Specific Heat Capacity, J/kg-K 410
900
Thermal Conductivity, W/m-K 20
150
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
37
Electrical Conductivity: Equal Weight (Specific), % IACS 12
120

Otherwise Unclassified Properties

Base Metal Price, % relative 45
9.5
Density, g/cm3 9.3
2.7
Embodied Carbon, kg CO2/kg material 8.4
8.5
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
50
Strength to Weight: Axial, points 23
18 to 29
Strength to Weight: Bending, points 20
26 to 35
Thermal Diffusivity, mm2/s 5.3
61
Thermal Shock Resistance, points 22
7.9 to 13

Alloy Composition

Aluminum (Al), % 0
95.5 to 98.2
Carbon (C), % 0.7 to 0.8
0
Chromium (Cr), % 3.9 to 4.3
0 to 0.15
Copper (Cu), % 0 to 0.3
0 to 0.15
Iron (Fe), % 73.7 to 77.6
0 to 0.5
Magnesium (Mg), % 0
1.7 to 2.4
Manganese (Mn), % 0 to 0.4
0.1 to 0.5
Molybdenum (Mo), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15