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4115 Aluminum vs. Grade 366 Molybdenum

4115 aluminum belongs to the aluminum alloys classification, while grade 366 molybdenum belongs to the otherwise unclassified metals. There are 20 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 4115 aluminum and the bottom bar is grade 366 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
300
Elongation at Break, % 1.1 to 11
2.2
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 26
120
Tensile Strength: Ultimate (UTS), MPa 120 to 220
580
Tensile Strength: Yield (Proof), MPa 39 to 190
470

Thermal Properties

Latent Heat of Fusion, J/g 420
310
Specific Heat Capacity, J/kg-K 900
210
Thermal Expansion, µm/m-K 23
7.6

Otherwise Unclassified Properties

Density, g/cm3 2.7
12
Embodied Carbon, kg CO2/kg material 8.1
27
Embodied Energy, MJ/kg 150
340
Embodied Water, L/kg 1160
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
12
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
18
Strength to Weight: Axial, points 12 to 23
13
Strength to Weight: Bending, points 20 to 30
13
Thermal Shock Resistance, points 5.2 to 9.9
18

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
0 to 0.030
Copper (Cu), % 0.1 to 0.5
0
Iron (Fe), % 0 to 0.7
0 to 0.010
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
0
Molybdenum (Mo), % 0
66.9 to 73
Nickel (Ni), % 0
0 to 0.0020
Nitrogen (N), % 0
0 to 0.0020
Oxygen (O), % 0
0 to 0.0025
Silicon (Si), % 1.8 to 2.2
0 to 0.010
Tungsten (W), % 0
27 to 33
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0