R30605 Cobalt vs. AWS BCo-1

Both R30605 cobalt and AWS BCo-1 are cobalt alloys. They have 84% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is AWS BCo-1.

UNS R30605 (L605, Alloy 25, 2.4964) Alloy AWS BCo-1 (R39001) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		200

Poisson's Ratio		0.29
Poisson's Ratio		0.3

Shear Modulus, GPa		81
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		1130 to 1900
Tensile Strength: Ultimate (UTS), MPa		700

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		420

Melting Completion (Liquidus), °C		1410
Melting Completion (Liquidus), °C		1150

Melting Onset (Solidus), °C		1330
Melting Onset (Solidus), °C		1120

Specific Heat Capacity, J/kg-K		410
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		9.6
Density, g/cm³		8.1

Embodied Carbon, kg CO₂/kg material		9.8
Embodied Carbon, kg CO₂/kg material		8.0

Embodied Energy, MJ/kg		140
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		450
Embodied Water, L/kg		430

Common Calculations

Stiffness to Weight: Axial, points		12
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		21
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		33 to 55
Strength to Weight: Axial, points		24

Strength to Weight: Bending, points		25 to 36
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		31 to 52
Thermal Shock Resistance, points		21

Alloy Composition

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

Boron (B), %		0
Boron (B), %		0.7 to 0.9

Carbon (C), %		0.050 to 0.15
Carbon (C), %		0.35 to 0.45

Chromium (Cr), %		19 to 21
Chromium (Cr), %		18 to 20

Cobalt (Co), %		46.4 to 57
Cobalt (Co), %		46 to 54

Iron (Fe), %		0 to 3.0
Iron (Fe), %		0 to 1.0

Manganese (Mn), %		1.0 to 2.0
Manganese (Mn), %		0

Nickel (Ni), %		9.0 to 11
Nickel (Ni), %		16 to 18

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.020

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

Silicon (Si), %		0 to 0.4
Silicon (Si), %		7.5 to 8.5

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.020

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

Tungsten (W), %		14 to 16
Tungsten (W), %		3.5 to 4.5

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

Residuals, %		0
Residuals, %		0 to 0.5