R30001 Cobalt vs. R30816 Cobalt

Both R30001 cobalt and R30816 cobalt are cobalt alloys. They have 73% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is R30816 cobalt.

UNS R30001 Co-Cr-W Alloy UNS R30816 (formerly Grade 671) Cobalt

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		210

Elongation at Break, %		1.0
Elongation at Break, %		23

Poisson's Ratio		0.28
Poisson's Ratio		0.3

Shear Modulus, GPa		86
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		1020

Thermal Properties

Latent Heat of Fusion, J/g		310
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1530
Melting Completion (Liquidus), °C		1540

Melting Onset (Solidus), °C		1260
Melting Onset (Solidus), °C		1460

Specific Heat Capacity, J/kg-K		430
Specific Heat Capacity, J/kg-K		420

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		13

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		9.0
Density, g/cm³		9.1

Embodied Carbon, kg CO₂/kg material		8.9
Embodied Carbon, kg CO₂/kg material		20

Embodied Energy, MJ/kg		130
Embodied Energy, MJ/kg		320

Embodied Water, L/kg		460
Embodied Water, L/kg		440

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

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

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		31

Strength to Weight: Bending, points		18
Strength to Weight: Bending, points		25

Thermal Diffusivity, mm²/s		3.7
Thermal Diffusivity, mm²/s		3.3

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		28

Alloy Composition

Carbon (C), %		2.0 to 3.0
Carbon (C), %		0.32 to 0.42

Chromium (Cr), %		28 to 32
Chromium (Cr), %		19 to 21

Cobalt (Co), %		43 to 59
Cobalt (Co), %		40 to 49.8

Iron (Fe), %		0 to 3.0
Iron (Fe), %		0 to 5.0

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

Molybdenum (Mo), %		0 to 1.0
Molybdenum (Mo), %		3.5 to 4.5

Nickel (Ni), %		0 to 3.0
Nickel (Ni), %		19 to 21

Niobium (Nb), %		0
Niobium (Nb), %		3.5 to 4.5

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

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 1.0

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

Tantalum (Ta), %		0
Tantalum (Ta), %		3.5 to 4.5

Tungsten (W), %		11 to 13
Tungsten (W), %		3.5 to 4.5