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SAE-AISI P4 Steel vs. EN AC-51400 Aluminum

SAE-AISI P4 steel belongs to the iron alloys classification, while EN AC-51400 aluminum belongs to the aluminum 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 SAE-AISI P4 steel and the bottom bar is EN AC-51400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
67
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 74
25
Tensile Strength: Ultimate (UTS), MPa 390 to 1980
190

Thermal Properties

Latent Heat of Fusion, J/g 260
400
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
600
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 41
110
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
31
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
110

Otherwise Unclassified Properties

Base Metal Price, % relative 4.4
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.8
9.1
Embodied Energy, MJ/kg 23
150
Embodied Water, L/kg 68
1170

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 14 to 70
20
Strength to Weight: Bending, points 15 to 45
28
Thermal Diffusivity, mm2/s 11
46
Thermal Shock Resistance, points 13 to 64
8.6

Alloy Composition

Aluminum (Al), % 0
90.5 to 95.5
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 4.0 to 5.3
0
Copper (Cu), % 0 to 0.25
0 to 0.050
Iron (Fe), % 92.3 to 95.3
0 to 0.55
Magnesium (Mg), % 0
4.5 to 6.5
Manganese (Mn), % 0.2 to 0.6
0 to 0.45
Molybdenum (Mo), % 0.4 to 1.0
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.1 to 0.4
0 to 1.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15