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R05255 Alloy vs. Type 1 Niobium

Both R05255 alloy and Type 1 niobium 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 R05255 alloy and the bottom bar is Type 1 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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