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A380.0 Aluminum vs. ACI-ASTM CF20 Steel

A380.0 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CF20 steel belongs to the iron alloys. There are 30 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 A380.0 aluminum and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 3.3
50
Fatigue Strength, MPa 140
240
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 290
530
Tensile Strength: Yield (Proof), MPa 160
250

Thermal Properties

Latent Heat of Fusion, J/g 510
300
Maximum Temperature: Mechanical, °C 170
970
Melting Completion (Liquidus), °C 590
1420
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 96
16
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 78
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
16
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.5
3.1
Embodied Energy, MJ/kg 140
44
Embodied Water, L/kg 1040
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.3
220
Resilience: Unit (Modulus of Resilience), kJ/m3 180
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 28
19
Strength to Weight: Bending, points 34
19
Thermal Diffusivity, mm2/s 38
4.3
Thermal Shock Resistance, points 13
11

Alloy Composition

Aluminum (Al), % 80.3 to 89.5
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 1.3
64.2 to 74
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.5
8.0 to 11
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