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Type 2 Niobium vs. S44625 Stainless Steel

Type 2 niobium belongs to the otherwise unclassified metals classification, while S44625 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is Type 2 niobium and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 29
22
Poisson's Ratio 0.4
0.27
Shear Modulus, GPa 38
80
Tensile Strength: Ultimate (UTS), MPa 140
590
Tensile Strength: Yield (Proof), MPa 82
360

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Specific Heat Capacity, J/kg-K 270
480
Thermal Conductivity, W/m-K 52
17
Thermal Expansion, µm/m-K 7.3
11

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Water, L/kg 160
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
110
Resilience: Unit (Modulus of Resilience), kJ/m3 32
310
Stiffness to Weight: Axial, points 6.8
15
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 4.6
21
Strength to Weight: Bending, points 7.1
20
Thermal Diffusivity, mm2/s 23
4.6
Thermal Shock Resistance, points 13
19

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.010
Chromium (Cr), % 0
25 to 27.5
Copper (Cu), % 0
0 to 0.2
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
69.4 to 74.3
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 0 to 0.020
0.75 to 1.5
Nickel (Ni), % 0 to 0.0050
0 to 0.5
Niobium (Nb), % 99.5 to 100
0
Nitrogen (N), % 0 to 0.010
0 to 0.015
Oxygen (O), % 0 to 0.025
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.0050
0 to 0.4
Sulfur (S), % 0
0 to 0.020
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
0