R05255 Alloy vs. AWS BNi-4

R05255 alloy belongs to the otherwise unclassified metals classification, while AWS BNi-4 belongs to the nickel alloys. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R05255 alloy and the bottom bar is AWS BNi-4.

UNS R05255 Tantalum-Tungsten Alloy AWS BNi-4 (N99640) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.34
Poisson's Ratio		0.31

Shear Modulus, GPa		70
Shear Modulus, GPa		67

Tensile Strength: Ultimate (UTS), MPa		540
Tensile Strength: Ultimate (UTS), MPa		430

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		340

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		470

Thermal Expansion, µm/m-K		6.6
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.5

Embodied Water, L/kg		630
Embodied Water, L/kg		220

Common Calculations

Stiffness to Weight: Axial, points		6.3
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		9.1
Strength to Weight: Axial, points		14

Strength to Weight: Bending, points		8.9
Strength to Weight: Bending, points		15

Thermal Shock Resistance, points		31
Thermal Shock Resistance, points		16

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.050

Boron (B), %		0
Boron (B), %		1.5 to 2.2

Carbon (C), %		0 to 0.010
Carbon (C), %		0 to 0.060

Cobalt (Co), %		0
Cobalt (Co), %		0 to 0.1

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

Iron (Fe), %		0 to 0.010
Iron (Fe), %		0 to 1.5

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

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		91.4 to 95.5

Niobium (Nb), %		0 to 0.5
Niobium (Nb), %		0

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

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		0 to 0.0050
Silicon (Si), %		3.0 to 4.0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.020

Tantalum (Ta), %		95.9 to 98
Tantalum (Ta), %		0

Titanium (Ti), %		0 to 0.010
Titanium (Ti), %		0 to 0.050

Tungsten (W), %		2.0 to 3.5
Tungsten (W), %		0

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5