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6081 Aluminum vs. 50Cr-50Ni Alloy

6081 aluminum belongs to the aluminum alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (9, 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 6081 aluminum and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 9.0
5.7
Poisson's Ratio 0.33
0.26
Shear Modulus, GPa 26
84
Tensile Strength: Ultimate (UTS), MPa 310
620
Tensile Strength: Yield (Proof), MPa 270
390

Thermal Properties

Latent Heat of Fusion, J/g 410
350
Specific Heat Capacity, J/kg-K 900
490
Thermal Expansion, µm/m-K 23
15

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
50
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 8.3
7.9
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 1180
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
31
Resilience: Unit (Modulus of Resilience), kJ/m3 540
350
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 32
21
Strength to Weight: Bending, points 37
20
Thermal Shock Resistance, points 14
14

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
0 to 0.25
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.1
48 to 52
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
0 to 1.0
Magnesium (Mg), % 0.6 to 1.0
0
Manganese (Mn), % 0.1 to 0.45
0 to 0.3
Nickel (Ni), % 0
44.5 to 52
Nitrogen (N), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.7 to 1.1
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0 to 0.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0