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Type 2 Niobium vs. S44725 Stainless Steel

Type 2 niobium belongs to the otherwise unclassified metals classification, while S44725 stainless steel belongs to the iron alloys. There are 21 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 S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
180
Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 29
22
Poisson's Ratio 0.4
0.27
Shear Modulus, GPa 38
81
Tensile Strength: Ultimate (UTS), MPa 140
500
Tensile Strength: Yield (Proof), MPa 82
310

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
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
99
Resilience: Unit (Modulus of Resilience), kJ/m3 32
240
Stiffness to Weight: Axial, points 6.8
15
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 4.6
18
Strength to Weight: Bending, points 7.1
18
Thermal Diffusivity, mm2/s 23
4.6
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
67.6 to 73.5
Manganese (Mn), % 0
0 to 0.4
Molybdenum (Mo), % 0 to 0.020
1.5 to 2.5
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Niobium (Nb), % 99.5 to 100
0 to 0.26
Nitrogen (N), % 0 to 0.010
0 to 0.018
Oxygen (O), % 0 to 0.025
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.0050
0 to 0.040
Sulfur (S), % 0
0 to 0.020
Tantalum (Ta), % 0 to 0.3
0
Titanium (Ti), % 0 to 0.030
0 to 0.26
Tungsten (W), % 0 to 0.050
0
Zirconium (Zr), % 0 to 0.020
0