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AZ91B Magnesium vs. Type 1 Niobium

AZ91B magnesium belongs to the magnesium alloys classification, while Type 1 niobium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (12, 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 AZ91B magnesium and the bottom bar is Type 1 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
79
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
29
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 18
38
Tensile Strength: Ultimate (UTS), MPa 240
140
Tensile Strength: Yield (Proof), MPa 160
82

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Specific Heat Capacity, J/kg-K 990
270
Thermal Conductivity, W/m-K 73
52
Thermal Expansion, µm/m-K 26
7.3

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.6
Embodied Water, L/kg 990
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
35
Resilience: Unit (Modulus of Resilience), kJ/m3 280
32
Stiffness to Weight: Axial, points 15
6.8
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
4.6
Strength to Weight: Bending, points 49
7.1
Thermal Diffusivity, mm2/s 42
23
Thermal Shock Resistance, points 14
13

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 0 to 0.35
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0
0 to 0.0050
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Molybdenum (Mo), % 0
0 to 0.010
Nickel (Ni), % 0 to 0.030
0 to 0.0050
Niobium (Nb), % 0
99.7 to 100
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.1
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
0 to 0.020