R05252 Alloy vs. Type 1 Niobium

Both R05252 alloy and Type 1 niobium are otherwise unclassified metals. Both are furnished in the annealed condition. 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 R05252 alloy and the bottom bar is Type 1 niobium.

UNS R05252 Tantalum-Tungsten Alloy Type 1 (Unalloyed Reactor Grade, R04200) Niobium

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		110

Elongation at Break, %		23
Elongation at Break, %		29

Poisson's Ratio		0.33
Poisson's Ratio		0.4

Shear Modulus, GPa		73
Shear Modulus, GPa		38

Tensile Strength: Ultimate (UTS), MPa		310
Tensile Strength: Ultimate (UTS), MPa		140

Tensile Strength: Yield (Proof), MPa		220
Tensile Strength: Yield (Proof), MPa		82

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		6.7
Thermal Expansion, µm/m-K		7.3

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.6

Embodied Water, L/kg		600
Embodied Water, L/kg		160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		63
Resilience: Ultimate (Unit Rupture Work), MJ/m³		35

Resilience: Unit (Modulus of Resilience), kJ/m³		120
Resilience: Unit (Modulus of Resilience), kJ/m³		32

Stiffness to Weight: Axial, points		6.5
Stiffness to Weight: Axial, points		6.8

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		5.2
Strength to Weight: Axial, points		4.6

Strength to Weight: Bending, points		6.1
Strength to Weight: Bending, points		7.1

Thermal Shock Resistance, points		17
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), %		0 to 0.1
Niobium (Nb), %		99.7 to 100

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

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

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

Tantalum (Ta), %		88.8 to 91
Tantalum (Ta), %		0 to 0.1

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

Tungsten (W), %		9.0 to 11
Tungsten (W), %		0 to 0.030

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