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ISO-WD32250 Magnesium vs. Type 4 Niobium

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while Type 4 niobium 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 ISO-WD32250 magnesium and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 4.5 to 8.6
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 17
38
Tensile Strength: Ultimate (UTS), MPa 310 to 330
220
Tensile Strength: Yield (Proof), MPa 240 to 290
140

Thermal Properties

Latent Heat of Fusion, J/g 340
310
Specific Heat Capacity, J/kg-K 980
270
Thermal Conductivity, W/m-K 130
42
Thermal Expansion, µm/m-K 26
7.3

Otherwise Unclassified Properties

Density, g/cm3 1.8
8.6
Embodied Water, L/kg 950
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
44
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 67
18
Strength to Weight: Axial, points 49 to 51
7.2
Strength to Weight: Bending, points 58 to 60
9.5
Thermal Diffusivity, mm2/s 72
18
Thermal Shock Resistance, points 19 to 20
21

Alloy Composition


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Carbon (C), % 0
0 to 0.010
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0
0 to 0.010
Magnesium (Mg), % 94.9 to 97.1
0
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0.8 to 1.2
Residuals, % 0 to 0.3
0