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ACI-ASTM CG12 Steel vs. 5082 Aluminum

ACI-ASTM CG12 steel belongs to the iron alloys classification, while 5082 aluminum belongs to the aluminum 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 ACI-ASTM CG12 steel and the bottom bar is 5082 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
67
Elongation at Break, % 40
1.1
Fatigue Strength, MPa 190
110 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
25
Tensile Strength: Ultimate (UTS), MPa 550
380 to 400
Tensile Strength: Yield (Proof), MPa 220
300 to 340

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1040
180
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
560
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
32
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
110

Otherwise Unclassified Properties

Base Metal Price, % relative 18
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.3
8.9
Embodied Energy, MJ/kg 48
150
Embodied Water, L/kg 160
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
4.0 to 4.3
Resilience: Unit (Modulus of Resilience), kJ/m3 120
670 to 870
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
51
Strength to Weight: Axial, points 20
39 to 41
Strength to Weight: Bending, points 19
43 to 45
Thermal Diffusivity, mm2/s 4.0
54
Thermal Shock Resistance, points 12
17 to 18

Alloy Composition

Aluminum (Al), % 0
93.5 to 96
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 20 to 23
0 to 0.15
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 60.3 to 70
0 to 0.35
Magnesium (Mg), % 0
4.0 to 5.0
Manganese (Mn), % 0 to 1.5
0 to 0.15
Nickel (Ni), % 10 to 13
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.2
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15