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EN AC-45400 Aluminum vs. SAE-AISI O6 Steel

EN AC-45400 aluminum belongs to the aluminum alloys classification, while SAE-AISI O6 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, 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 EN AC-45400 aluminum and the bottom bar is SAE-AISI O6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
180
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
71
Tensile Strength: Ultimate (UTS), MPa 260
670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g 470
260
Melting Completion (Liquidus), °C 630
1430
Melting Onset (Solidus), °C 560
1390
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 140
43
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 95
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.3
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 7.8
1.5
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1100
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 25
24 to 74
Strength to Weight: Bending, points 32
22 to 47
Thermal Diffusivity, mm2/s 54
12
Thermal Shock Resistance, points 12
22 to 69

Alloy Composition

Aluminum (Al), % 88.4 to 92.9
0
Carbon (C), % 0
1.3 to 1.6
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 2.6 to 3.6
0 to 0.25
Iron (Fe), % 0 to 0.6
94.6 to 97.7
Lead (Pb), % 0 to 0.1
0
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.55
0.3 to 1.1
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0 to 0.1
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 4.5 to 6.0
0.55 to 1.5
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0