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2124 Aluminum vs. EN 1.0308 Steel

2124 aluminum belongs to the aluminum alloys classification, while EN 1.0308 steel belongs to the iron alloys. There are 30 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 2124 aluminum and the bottom bar is EN 1.0308 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.7
7.8 to 28
Fatigue Strength, MPa 130
140 to 200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 280
230 to 260
Tensile Strength: Ultimate (UTS), MPa 490
360 to 440
Tensile Strength: Yield (Proof), MPa 430
190 to 340

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 190
400
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 500
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
51
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 10
1.8
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.2
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
32 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 1290
93 to 300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 45
13 to 16
Strength to Weight: Bending, points 46
14 to 16
Thermal Diffusivity, mm2/s 58
14
Thermal Shock Resistance, points 21
11 to 14

Alloy Composition

Aluminum (Al), % 91.3 to 94.7
0
Carbon (C), % 0
0 to 0.17
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
0
Iron (Fe), % 0 to 0.3
98.2 to 100
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0 to 1.2
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 0.35
Sulfur (S), % 0
0 to 0.045
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0