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EN 1.7701 Steel vs. 2025 Aluminum

EN 1.7701 steel belongs to the iron alloys classification, while 2025 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 1.7701 steel and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 480
110
Elastic (Young's, Tensile) Modulus, GPa 190
72
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 670 to 2010
400

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
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 44
150
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
40
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
120

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.9
7.9
Embodied Energy, MJ/kg 26
150
Embodied Water, L/kg 52
1130

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 24 to 71
37
Strength to Weight: Bending, points 22 to 45
40
Thermal Diffusivity, mm2/s 12
58
Thermal Shock Resistance, points 20 to 59
18

Alloy Composition


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Aluminum (Al), % 0
90.9 to 95.2
Carbon (C), % 0.48 to 0.56
0
Chromium (Cr), % 0.9 to 1.2
0 to 0.1
Copper (Cu), % 0
3.9 to 5.0
Iron (Fe), % 96.2 to 97.7
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.7 to 1.1
0.4 to 1.2
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.4
0.5 to 1.2
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0.1 to 0.2
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15