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Grade 366 Molybdenum vs. ZK51A Magnesium

Grade 366 molybdenum belongs to the otherwise unclassified metals classification, while ZK51A magnesium belongs to the magnesium alloys. 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 grade 366 molybdenum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 300
45
Elongation at Break, % 2.2
4.7
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 120
18
Tensile Strength: Ultimate (UTS), MPa 580
240
Tensile Strength: Yield (Proof), MPa 470
150

Thermal Properties

Latent Heat of Fusion, J/g 310
340
Specific Heat Capacity, J/kg-K 210
970
Thermal Expansion, µm/m-K 7.6
26

Otherwise Unclassified Properties

Density, g/cm3 12
1.8
Embodied Carbon, kg CO2/kg material 27
24
Embodied Energy, MJ/kg 340
160
Embodied Water, L/kg 300
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
10
Resilience: Unit (Modulus of Resilience), kJ/m3 370
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 18
64
Strength to Weight: Axial, points 13
36
Strength to Weight: Bending, points 13
47
Thermal Shock Resistance, points 18
15

Alloy Composition

Carbon (C), % 0 to 0.030
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 0.010
0
Magnesium (Mg), % 0
93.1 to 95.9
Molybdenum (Mo), % 66.9 to 73
0
Nickel (Ni), % 0 to 0.0020
0 to 0.010
Nitrogen (N), % 0 to 0.0020
0
Oxygen (O), % 0 to 0.0025
0
Silicon (Si), % 0 to 0.010
0
Tungsten (W), % 27 to 33
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3