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7178 Aluminum vs. SAE-AISI M52 Steel

7178 aluminum belongs to the aluminum alloys classification, while SAE-AISI M52 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 7178 aluminum and the bottom bar is SAE-AISI M52 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
75
Tensile Strength: Ultimate (UTS), MPa 240 to 640
710 to 2280

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Melting Completion (Liquidus), °C 630
1510
Melting Onset (Solidus), °C 480
1470
Specific Heat Capacity, J/kg-K 860
460
Thermal Conductivity, W/m-K 130
31
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 91
10

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
7.9
Embodied Carbon, kg CO2/kg material 8.2
7.5
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1110
89

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 21 to 58
25 to 80
Strength to Weight: Bending, points 28 to 54
22 to 49
Thermal Diffusivity, mm2/s 47
8.4
Thermal Shock Resistance, points 10 to 28
21 to 67

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0.85 to 1.0
Chromium (Cr), % 0.18 to 0.28
3.5 to 4.3
Copper (Cu), % 1.6 to 2.4
0 to 0.25
Iron (Fe), % 0 to 0.5
84.4 to 88.9
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0.15 to 0.45
Molybdenum (Mo), % 0
4.0 to 4.9
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.4
0.2 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
0.75 to 1.5
Vanadium (V), % 0
1.7 to 2.3
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0

Comparable Variants