R05240 Alloy vs. Type 1 Niobium

Both R05240 alloy and Type 1 niobium are otherwise unclassified metals. Both are furnished in the annealed condition. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 18 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is R05240 alloy and the bottom bar is Type 1 niobium.

UNS R05240 Tantalum-Niobium Alloy Type 1 (Unalloyed Reactor Grade, R04200) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		150
Elastic (Young's, Tensile) Modulus, GPa		110

Elongation at Break, %		25
Elongation at Break, %		29

Poisson's Ratio		0.36
Poisson's Ratio		0.4

Shear Modulus, GPa		57
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		270
Tensile Strength: Ultimate (UTS), MPa		140

Tensile Strength: Yield (Proof), MPa		170
Tensile Strength: Yield (Proof), MPa		82

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		190
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		6.8
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		14
Density, g/cm³		8.6

Embodied Water, L/kg		460
Embodied Water, L/kg		160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		59
Resilience: Ultimate (Unit Rupture Work), MJ/m³		35

Resilience: Unit (Modulus of Resilience), kJ/m³		90
Resilience: Unit (Modulus of Resilience), kJ/m³		32

Stiffness to Weight: Axial, points		6.3
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		5.4
Strength to Weight: Axial, points		4.6

Strength to Weight: Bending, points		6.8
Strength to Weight: Bending, points		7.1

Thermal Shock Resistance, points		18
Thermal Shock Resistance, points		13

Alloy Composition

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.010

Hafnium (Hf), %		0
Hafnium (Hf), %		0 to 0.020

Hydrogen (H), %		0 to 0.0015
Hydrogen (H), %		0 to 0.0015

Iron (Fe), %		0 to 0.010
Iron (Fe), %		0 to 0.0050

Molybdenum (Mo), %		0 to 0.020
Molybdenum (Mo), %		0 to 0.010

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		0 to 0.0050

Niobium (Nb), %		35 to 42
Niobium (Nb), %		99.7 to 100

Nitrogen (N), %		0 to 0.010
Nitrogen (N), %		0 to 0.010

Oxygen (O), %		0 to 0.020
Oxygen (O), %		0 to 0.015

Silicon (Si), %		0 to 0.0050
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		57.9 to 65
Tantalum (Ta), %		0 to 0.1

Titanium (Ti), %		0 to 0.010
Titanium (Ti), %		0 to 0.020

Tungsten (W), %		0 to 0.050
Tungsten (W), %		0 to 0.030

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.020