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5070 Aluminum vs. SAE-AISI A9 Steel

5070 aluminum belongs to the aluminum alloys classification, while SAE-AISI A9 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 5070 aluminum and the bottom bar is SAE-AISI A9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
74
Tensile Strength: Ultimate (UTS), MPa 300
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
35
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 100
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.8
4.7
Embodied Energy, MJ/kg 150
70
Embodied Water, L/kg 1170
82

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 31
28 to 73
Strength to Weight: Bending, points 37
24 to 46
Thermal Diffusivity, mm2/s 53
9.6
Thermal Shock Resistance, points 14
25 to 66

Alloy Composition


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Aluminum (Al), % 92.4 to 95.7
0
Carbon (C), % 0
0.45 to 0.55
Chromium (Cr), % 0 to 0.3
4.8 to 5.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 0 to 0.4
87 to 90.5
Magnesium (Mg), % 3.5 to 4.5
0
Manganese (Mn), % 0.4 to 0.8
0 to 0.5
Molybdenum (Mo), % 0
1.3 to 1.8
Nickel (Ni), % 0
1.3 to 1.8
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.25
1.0 to 1.2
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Vanadium (V), % 0
0.8 to 1.4
Zinc (Zn), % 0.4 to 0.8
0
Residuals, % 0 to 0.15
0