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EN 1.7231 Steel vs. 2618A Aluminum

EN 1.7231 steel belongs to the iron alloys classification, while 2618A aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 1.7231 steel and the bottom bar is 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 11 to 12
4.5
Fatigue Strength, MPa 360 to 500
120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 790 to 930
440
Tensile Strength: Yield (Proof), MPa 570 to 800
410

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 420
230
Melting Completion (Liquidus), °C 1460
670
Melting Onset (Solidus), °C 1420
560
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 46
150
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
37
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.5
8.4
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 51
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 100
19
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 1700
1180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 28 to 33
41
Strength to Weight: Bending, points 24 to 27
44
Thermal Diffusivity, mm2/s 12
59
Thermal Shock Resistance, points 23 to 27
19

Alloy Composition

Aluminum (Al), % 0
91.5 to 95.2
Carbon (C), % 0.38 to 0.45
0
Chromium (Cr), % 0.8 to 1.2
0
Copper (Cu), % 0
1.8 to 2.7
Iron (Fe), % 96.4 to 98.1
0.9 to 1.4
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0.6 to 1.0
0 to 0.25
Molybdenum (Mo), % 0.15 to 0.3
0
Nickel (Ni), % 0
0.8 to 1.4
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.6
0.15 to 0.25
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.15
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15