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ACI-ASTM CG12 Steel vs. 6182 Aluminum

ACI-ASTM CG12 steel belongs to the iron alloys classification, while 6182 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 6182 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 40
6.8 to 13
Fatigue Strength, MPa 190
63 to 99
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 550
230 to 320
Tensile Strength: Yield (Proof), MPa 220
130 to 270

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1040
190
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
160
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
130

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
8.4
Embodied Energy, MJ/kg 48
150
Embodied Water, L/kg 160
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 120
110 to 520
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 20
23 to 32
Strength to Weight: Bending, points 19
30 to 38
Thermal Diffusivity, mm2/s 4.0
65
Thermal Shock Resistance, points 12
10 to 14

Alloy Composition

Aluminum (Al), % 0
95 to 97.9
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 20 to 23
0 to 0.25
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 60.3 to 70
0 to 0.5
Magnesium (Mg), % 0
0.7 to 1.2
Manganese (Mn), % 0 to 1.5
0.5 to 1.0
Nickel (Ni), % 10 to 13
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0.9 to 1.3
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0.050 to 0.2
Residuals, % 0
0 to 0.15