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2618A Aluminum vs. EN 1.7231 Steel

2618A aluminum belongs to the aluminum alloys classification, while EN 1.7231 steel belongs to the iron 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 2618A aluminum and the bottom bar is EN 1.7231 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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