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5254 Aluminum vs. ACI-ASTM CT15C Steel

5254 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CT15C steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 5254 aluminum and the bottom bar is ACI-ASTM CT15C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 3.4 to 22
23
Fatigue Strength, MPa 110 to 160
130
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 240 to 350
500
Tensile Strength: Yield (Proof), MPa 100 to 270
190

Thermal Properties

Latent Heat of Fusion, J/g 400
310
Maximum Temperature: Mechanical, °C 190
1080
Melting Completion (Liquidus), °C 640
1410
Melting Onset (Solidus), °C 590
1360
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 24
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
36
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 8.8
6.1
Embodied Energy, MJ/kg 150
88
Embodied Water, L/kg 1180
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11 to 41
90
Resilience: Unit (Modulus of Resilience), kJ/m3 73 to 550
93
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 25 to 37
17
Strength to Weight: Bending, points 32 to 41
17
Thermal Diffusivity, mm2/s 52
3.2
Thermal Shock Resistance, points 10 to 16
12

Alloy Composition

Aluminum (Al), % 94.4 to 96.8
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0.15 to 0.35
19 to 21
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.45
40.3 to 49.2
Magnesium (Mg), % 3.1 to 3.9
0
Manganese (Mn), % 0 to 0.010
0.15 to 1.5
Nickel (Ni), % 0
31 to 34
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.45
0.15 to 1.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0