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5449 Aluminum vs. EN 1.7378 Steel

5449 aluminum belongs to the aluminum alloys classification, while EN 1.7378 steel belongs to the iron alloys. There are 30 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 5449 aluminum and the bottom bar is EN 1.7378 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 4.0 to 17
17
Fatigue Strength, MPa 78 to 120
330
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
74
Shear Strength, MPa 130 to 190
430
Tensile Strength: Ultimate (UTS), MPa 210 to 330
700
Tensile Strength: Yield (Proof), MPa 91 to 260
490

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Maximum Temperature: Mechanical, °C 190
460
Melting Completion (Liquidus), °C 650
1470
Melting Onset (Solidus), °C 590
1430
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 140
39
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.0
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.5
2.3
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 1180
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 29
110
Resilience: Unit (Modulus of Resilience), kJ/m3 60 to 480
630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 22 to 33
25
Strength to Weight: Bending, points 29 to 39
22
Thermal Diffusivity, mm2/s 56
10
Thermal Shock Resistance, points 9.4 to 15
20

Alloy Composition

Aluminum (Al), % 94.1 to 97.8
0 to 0.020
Boron (B), % 0
0.0015 to 0.0070
Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0 to 0.3
2.2 to 2.6
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
94.6 to 96.1
Magnesium (Mg), % 1.6 to 2.6
0
Manganese (Mn), % 0.6 to 1.1
0.3 to 0.7
Molybdenum (Mo), % 0
0.9 to 1.1
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.4
0.15 to 0.45
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.1
0.050 to 0.1
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0