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6110 Aluminum vs. SAE-AISI P21 Steel

6110 aluminum belongs to the aluminum alloys classification, while SAE-AISI P21 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 6110 aluminum and the bottom bar is SAE-AISI P21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 500
1130

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 600
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 170
41
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 140
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
6.5
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.2
2.3
Embodied Energy, MJ/kg 150
32
Embodied Water, L/kg 1170
62

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 51
40
Strength to Weight: Bending, points 51
31
Thermal Diffusivity, mm2/s 67
11
Thermal Shock Resistance, points 22
37

Alloy Composition

Aluminum (Al), % 94.4 to 98.4
0
Carbon (C), % 0
0.18 to 0.22
Chromium (Cr), % 0.040 to 0.25
0 to 0.5
Cobalt (Co), % 0
1.1 to 1.3
Copper (Cu), % 0.2 to 0.7
0 to 0.25
Iron (Fe), % 0 to 0.8
92.1 to 94.2
Magnesium (Mg), % 0.5 to 1.1
0
Manganese (Mn), % 0.2 to 0.7
0.35 to 0.72
Nickel (Ni), % 0
3.9 to 4.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.7 to 1.5
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Vanadium (V), % 0
0.15 to 0.25
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0