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ACI-ASTM CC50 Steel vs. 2124 Aluminum

ACI-ASTM CC50 steel belongs to the iron alloys classification, while 2124 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 ACI-ASTM CC50 steel and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 430
490

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1370
500
Specific Heat Capacity, J/kg-K 490
880
Thermal Conductivity, W/m-K 17
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
38
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 14
10
Density, g/cm3 7.6
3.0
Embodied Carbon, kg CO2/kg material 2.7
8.2
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 170
1150

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
46
Strength to Weight: Axial, points 16
45
Strength to Weight: Bending, points 17
46
Thermal Diffusivity, mm2/s 4.5
58
Thermal Shock Resistance, points 14
21

Alloy Composition

Aluminum (Al), % 0
91.3 to 94.7
Carbon (C), % 0 to 0.5
0
Chromium (Cr), % 26 to 30
0 to 0.1
Copper (Cu), % 0
3.8 to 4.9
Iron (Fe), % 62.9 to 74
0 to 0.3
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 1.0
0.3 to 0.9
Nickel (Ni), % 0 to 4.0
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0 to 0.2
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15