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Nickel 725 vs. Type 4 Niobium

Nickel 725 belongs to the nickel alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 18 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 nickel 725 and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 34
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 78
38
Tensile Strength: Ultimate (UTS), MPa 860
220
Tensile Strength: Yield (Proof), MPa 350
140

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Specific Heat Capacity, J/kg-K 440
270
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.6
Embodied Water, L/kg 270
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
44
Resilience: Unit (Modulus of Resilience), kJ/m3 300
93
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 23
18
Strength to Weight: Axial, points 28
7.2
Strength to Weight: Bending, points 24
9.5
Thermal Shock Resistance, points 23
21

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.010
Chromium (Cr), % 19 to 22.5
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 2.3 to 15.3
0 to 0.010
Manganese (Mn), % 0 to 0.35
0
Molybdenum (Mo), % 7.0 to 9.5
0 to 0.050
Nickel (Ni), % 55 to 59
0 to 0.0050
Niobium (Nb), % 2.8 to 4.0
98.1 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.2
0 to 0.0050
Sulfur (S), % 0 to 0.010
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 1.0 to 1.7
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Zirconium (Zr), % 0
0.8 to 1.2