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EN AC-45400 Aluminum vs. SAE-AISI A8 Steel

EN AC-45400 aluminum belongs to the aluminum alloys classification, while SAE-AISI A8 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
74
Tensile Strength: Ultimate (UTS), MPa 260
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 470
270
Melting Completion (Liquidus), °C 630
1480
Melting Onset (Solidus), °C 560
1430
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 140
37
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 95
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
8.5
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 7.8
2.3
Embodied Energy, MJ/kg 150
31
Embodied Water, L/kg 1100
73

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 25
25 to 68
Strength to Weight: Bending, points 32
22 to 44
Thermal Diffusivity, mm2/s 54
9.9
Thermal Shock Resistance, points 12
22 to 62

Alloy Composition

Aluminum (Al), % 88.4 to 92.9
0
Carbon (C), % 0
0.5 to 0.6
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 2.6 to 3.6
0 to 0.25
Iron (Fe), % 0 to 0.6
88.5 to 91.9
Lead (Pb), % 0 to 0.1
0
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.55
0 to 0.5
Molybdenum (Mo), % 0
1.2 to 1.7
Nickel (Ni), % 0 to 0.1
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 4.5 to 6.0
0.75 to 1.1
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
1.0 to 1.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0