R31538 Cobalt vs. AWS BNi-6

R31538 cobalt belongs to the cobalt alloys classification, while AWS BNi-6 belongs to the nickel 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 R31538 cobalt and the bottom bar is AWS BNi-6.

High Carbon Co-28Cr-6Mo Alloy (ASTM F1537 Alloy 2, ISO 5832-12 Alloy 2, R31538)AWS BNi-6 (N99700) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		160

Poisson's Ratio		0.29
Poisson's Ratio		0.31

Shear Modulus, GPa		86
Shear Modulus, GPa		62

Tensile Strength: Ultimate (UTS), MPa		1020 to 1360
Tensile Strength: Ultimate (UTS), MPa		450

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		1360
Melting Completion (Liquidus), °C		880

Melting Onset (Solidus), °C		1290
Melting Onset (Solidus), °C		880

Specific Heat Capacity, J/kg-K		450
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		9.8

Otherwise Unclassified Properties

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

Embodied Carbon, kg CO₂/kg material		8.1
Embodied Carbon, kg CO₂/kg material		9.4

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

Embodied Water, L/kg		530
Embodied Water, L/kg		210

Common Calculations

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		11

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		22

Strength to Weight: Axial, points		34 to 45
Strength to Weight: Axial, points		15

Strength to Weight: Bending, points		27 to 32
Strength to Weight: Bending, points		16

Thermal Shock Resistance, points		25 to 33
Thermal Shock Resistance, points		20

Alloy Composition

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

Carbon (C), %		0.15 to 0.35
Carbon (C), %		0 to 0.060

Chromium (Cr), %		26 to 30
Chromium (Cr), %		0

Cobalt (Co), %		58.7 to 68.9
Cobalt (Co), %		0 to 0.1

Iron (Fe), %		0 to 0.75
Iron (Fe), %		0

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0

Molybdenum (Mo), %		5.0 to 7.0
Molybdenum (Mo), %		0

Nickel (Ni), %		0 to 1.0
Nickel (Ni), %		87.2 to 90

Nitrogen (N), %		0 to 0.25
Nitrogen (N), %		0

Phosphorus (P), %		0
Phosphorus (P), %		10 to 12

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0

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

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

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

Residuals, %		0
Residuals, %		0 to 0.5