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7178 Aluminum vs. 60Cr-40Ni Alloy

7178 aluminum belongs to the aluminum alloys classification, while 60Cr-40Ni alloy belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (11, 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 60Cr-40Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
220
Poisson's Ratio 0.32
0.25
Shear Modulus, GPa 27
87
Tensile Strength: Ultimate (UTS), MPa 240 to 640
870
Tensile Strength: Yield (Proof), MPa 120 to 560
660

Thermal Properties

Latent Heat of Fusion, J/g 370
370
Specific Heat Capacity, J/kg-K 860
490
Thermal Expansion, µm/m-K 23
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
49
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.2
7.4
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1110
380

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
1000
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 45
26
Strength to Weight: Axial, points 21 to 58
31
Strength to Weight: Bending, points 28 to 54
26
Thermal Shock Resistance, points 10 to 28
18

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0 to 0.25
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0.18 to 0.28
58 to 62
Copper (Cu), % 1.6 to 2.4
0
Iron (Fe), % 0 to 0.5
0 to 1.0
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.3
Nickel (Ni), % 0
34.5 to 42
Nitrogen (N), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0 to 0.5
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0