AWS BNi-2 vs. R30021 Cobalt

AWS BNi-2 belongs to the nickel alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is AWS BNi-2 and the bottom bar is R30021 cobalt.

AWS BNi-2 (N99620) Filler Metal UNS R30021 Co-Cr-W Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		180
Elastic (Young's, Tensile) Modulus, GPa		220

Poisson's Ratio		0.3
Poisson's Ratio		0.29

Shear Modulus, GPa		68
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		440
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		360
Latent Heat of Fusion, J/g		330

Melting Completion (Liquidus), °C		1000
Melting Completion (Liquidus), °C		1350

Melting Onset (Solidus), °C		970
Melting Onset (Solidus), °C		1190

Specific Heat Capacity, J/kg-K		490
Specific Heat Capacity, J/kg-K		450

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

Otherwise Unclassified Properties

Density, g/cm³		8.2
Density, g/cm³		8.4

Embodied Carbon, kg CO₂/kg material		9.3
Embodied Carbon, kg CO₂/kg material		8.0

Embodied Energy, MJ/kg		130
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		230
Embodied Water, L/kg		520

Common Calculations

Stiffness to Weight: Axial, points		12
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		15
Strength to Weight: Axial, points		23

Strength to Weight: Bending, points		16
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		16
Thermal Shock Resistance, points		21

Alloy Composition

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

Boron (B), %		2.8 to 3.5
Boron (B), %		0

Carbon (C), %		0 to 0.060
Carbon (C), %		0.2 to 0.35

Chromium (Cr), %		6.0 to 8.0
Chromium (Cr), %		26 to 29

Cobalt (Co), %		0 to 0.1
Cobalt (Co), %		61.7 to 67.3

Iron (Fe), %		2.5 to 3.5
Iron (Fe), %		0 to 3.0

Molybdenum (Mo), %		0
Molybdenum (Mo), %		4.5 to 6.0

Nickel (Ni), %		79.1 to 84.8
Nickel (Ni), %		2.0 to 3.0

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

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

Silicon (Si), %		4.0 to 5.0
Silicon (Si), %		0 to 1.5

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

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

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

Residuals, %		0 to 0.5
Residuals, %		0