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EN 1.5508 Steel vs. 2025 Aluminum

EN 1.5508 steel belongs to the iron alloys classification, while 2025 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 1.5508 steel and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
110
Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 11 to 20
15
Fatigue Strength, MPa 210 to 320
130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 300 to 360
240
Tensile Strength: Ultimate (UTS), MPa 420 to 1460
400
Tensile Strength: Yield (Proof), MPa 310 to 490
260

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
190
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
520
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 51
150
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
40
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
120

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.4
7.9
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 47
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 230
55
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 640
450
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 15 to 52
37
Strength to Weight: Bending, points 16 to 36
40
Thermal Diffusivity, mm2/s 14
58
Thermal Shock Resistance, points 12 to 43
18

Alloy Composition

Aluminum (Al), % 0
90.9 to 95.2
Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.2 to 0.25
0
Chromium (Cr), % 0 to 0.3
0 to 0.1
Copper (Cu), % 0 to 0.25
3.9 to 5.0
Iron (Fe), % 97.9 to 99.199
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.6 to 0.9
0.4 to 1.2
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.3
0.5 to 1.2
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15