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7178 Aluminum vs. EN 1.7102 Steel

7178 aluminum belongs to the aluminum alloys classification, while EN 1.7102 steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 EN 1.7102 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
72
Tensile Strength: Ultimate (UTS), MPa 240 to 640
670 to 2010

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 630
1440
Melting Onset (Solidus), °C 480
1400
Specific Heat Capacity, J/kg-K 860
480
Thermal Conductivity, W/m-K 130
47
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.2
Density, g/cm3 3.1
7.7
Embodied Carbon, kg CO2/kg material 8.2
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1110
48

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 21 to 58
24 to 72
Strength to Weight: Bending, points 28 to 54
22 to 46
Thermal Diffusivity, mm2/s 47
13
Thermal Shock Resistance, points 10 to 28
20 to 60

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
0.51 to 0.59
Chromium (Cr), % 0.18 to 0.28
0.5 to 0.8
Copper (Cu), % 1.6 to 2.4
0
Iron (Fe), % 0 to 0.5
96.2 to 97.3
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0.5 to 0.8
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.4
1.2 to 1.6
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0

Comparable Variants