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380.0 Aluminum vs. ACI-ASTM CG12 Steel

380.0 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CG12 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 380.0 aluminum and the bottom bar is ACI-ASTM CG12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160
Elastic (Young's, Tensile) Modulus, GPa 74
200
Elongation at Break, % 3.0
40
Fatigue Strength, MPa 140
190
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
78
Tensile Strength: Ultimate (UTS), MPa 320
550
Tensile Strength: Yield (Proof), MPa 160
220

Thermal Properties

Latent Heat of Fusion, J/g 510
300
Maximum Temperature: Mechanical, °C 170
1040
Melting Completion (Liquidus), °C 590
1410
Melting Onset (Solidus), °C 540
1370
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 100
15
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 83
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
18
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.5
3.3
Embodied Energy, MJ/kg 140
48
Embodied Water, L/kg 1040
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0
180
Resilience: Unit (Modulus of Resilience), kJ/m3 170
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 31
20
Strength to Weight: Bending, points 36
19
Thermal Diffusivity, mm2/s 40
4.0
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 79.6 to 89.5
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 2.0
60.3 to 70
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.5
10 to 13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0