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Type 2 Niobium vs. Low-oxygen Zirconium

Both Type 2 niobium and low-oxygen zirconium are otherwise unclassified metals. Both are furnished in the annealed condition. There are 20 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is Type 2 niobium and the bottom bar is low-oxygen zirconium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
98
Elongation at Break, % 29
23
Poisson's Ratio 0.4
0.34
Shear Modulus, GPa 38
37
Tensile Strength: Ultimate (UTS), MPa 140
330
Tensile Strength: Yield (Proof), MPa 82
270

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Specific Heat Capacity, J/kg-K 270
270
Thermal Conductivity, W/m-K 52
22
Thermal Expansion, µm/m-K 7.3
5.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
6.7
Embodied Water, L/kg 160
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
70
Resilience: Unit (Modulus of Resilience), kJ/m3 32
370
Stiffness to Weight: Axial, points 6.8
8.1
Stiffness to Weight: Bending, points 18
23
Strength to Weight: Axial, points 4.6
14
Strength to Weight: Bending, points 7.1
16
Thermal Diffusivity, mm2/s 23
12
Thermal Shock Resistance, points 13
42

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.050
Chromium (Cr), % 0
0 to 0.2
Hafnium (Hf), % 0 to 0.020
0 to 4.5
Hydrogen (H), % 0 to 0.0015
0 to 0.0050
Iron (Fe), % 0 to 0.010
0 to 0.2
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.0050
0
Niobium (Nb), % 99.5 to 100
0
Nitrogen (N), % 0 to 0.010
0 to 0.025
Oxygen (O), % 0 to 0.025
0 to 0.1
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 0 to 0.3
0
Titanium (Ti), % 0 to 0.030
0
Tungsten (W), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.020
94.7 to 100