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Type 1 Niobium vs. R05255 Alloy

Both Type 1 niobium and R05255 alloy are otherwise unclassified metals. Both are furnished in the annealed condition. 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 Type 1 niobium and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 29
20
Poisson's Ratio 0.4
0.34
Shear Modulus, GPa 38
70
Tensile Strength: Ultimate (UTS), MPa 140
540
Tensile Strength: Yield (Proof), MPa 82
450

Thermal Properties

Latent Heat of Fusion, J/g 320
140
Specific Heat Capacity, J/kg-K 270
140
Thermal Conductivity, W/m-K 52
59
Thermal Expansion, µm/m-K 7.3
6.6

Otherwise Unclassified Properties

Density, g/cm3 8.6
17
Embodied Water, L/kg 160
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35
100
Resilience: Unit (Modulus of Resilience), kJ/m3 32
530
Stiffness to Weight: Axial, points 6.8
6.3
Stiffness to Weight: Bending, points 18
11
Strength to Weight: Axial, points 4.6
9.1
Strength to Weight: Bending, points 7.1
8.9
Thermal Diffusivity, mm2/s 23
25
Thermal Shock Resistance, points 13
31

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.010
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0 to 0.0015
Iron (Fe), % 0 to 0.0050
0 to 0.010
Molybdenum (Mo), % 0 to 0.010
0 to 0.020
Nickel (Ni), % 0 to 0.0050
0 to 0.010
Niobium (Nb), % 99.7 to 100
0 to 0.5
Nitrogen (N), % 0 to 0.010
0 to 0.010
Oxygen (O), % 0 to 0.015
0 to 0.015
Silicon (Si), % 0 to 0.0050
0 to 0.0050
Tantalum (Ta), % 0 to 0.1
95.9 to 98
Titanium (Ti), % 0 to 0.020
0 to 0.010
Tungsten (W), % 0 to 0.030
2.0 to 3.5
Zirconium (Zr), % 0 to 0.020
0