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Type 2 Niobium vs. S45000 Stainless Steel

Type 2 niobium belongs to the otherwise unclassified metals classification, while S45000 stainless steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is Type 2 niobium and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 29
6.8 to 14
Poisson's Ratio 0.4
0.28
Shear Modulus, GPa 38
76
Tensile Strength: Ultimate (UTS), MPa 140
980 to 1410
Tensile Strength: Yield (Proof), MPa 82
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 320
280
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
7.8
Embodied Water, L/kg 160
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 32
850 to 4400
Stiffness to Weight: Axial, points 6.8
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 4.6
35 to 50
Strength to Weight: Bending, points 7.1
28 to 36
Thermal Diffusivity, mm2/s 23
4.5
Thermal Shock Resistance, points 13
33 to 47

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.050
Chromium (Cr), % 0
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
72.1 to 79.3
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 0.020
0.5 to 1.0
Nickel (Ni), % 0 to 0.0050
5.0 to 7.0
Niobium (Nb), % 99.5 to 100
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.025
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.0050
0 to 1.0
Sulfur (S), % 0
0 to 0.030
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