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R05400 Tantalum vs. Type 2 Niobium

Both R05400 tantalum and Type 2 niobium are otherwise unclassified metals. 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 R05400 tantalum and the bottom bar is Type 2 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 1.1 to 28
29
Poisson's Ratio 0.34
0.4
Shear Modulus, GPa 69
38
Tensile Strength: Ultimate (UTS), MPa 210 to 540
140
Tensile Strength: Yield (Proof), MPa 140 to 390
82

Thermal Properties

Latent Heat of Fusion, J/g 140
320
Specific Heat Capacity, J/kg-K 140
270
Thermal Conductivity, W/m-K 59
52
Thermal Expansion, µm/m-K 6.5
7.3

Otherwise Unclassified Properties

Density, g/cm3 17
8.6
Embodied Water, L/kg 650
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
35
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
32
Stiffness to Weight: Axial, points 6.2
6.8
Stiffness to Weight: Bending, points 11
18
Strength to Weight: Axial, points 3.6 to 9.0
4.6
Strength to Weight: Bending, points 4.8 to 8.8
7.1
Thermal Diffusivity, mm2/s 25
23
Thermal Shock Resistance, points 13 to 32
13

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.010
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0 to 0.0015
0 to 0.0015
Iron (Fe), % 0 to 0.010
0 to 0.010
Molybdenum (Mo), % 0 to 0.020
0 to 0.020
Nickel (Ni), % 0 to 0.010
0 to 0.0050
Niobium (Nb), % 0 to 0.1
99.5 to 100
Nitrogen (N), % 0 to 0.010
0 to 0.010
Oxygen (O), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.0050
0 to 0.0050
Tantalum (Ta), % 99.7 to 100
0 to 0.3
Titanium (Ti), % 0 to 0.010
0 to 0.030
Tungsten (W), % 0 to 0.050
0 to 0.050
Zirconium (Zr), % 0
0 to 0.020