R30012 Cobalt vs. R05240 Alloy

R30012 cobalt belongs to the cobalt alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30012 cobalt and the bottom bar is R05240 alloy.

UNS R30012 Co-Cr-W Alloy UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		220
Elastic (Young's, Tensile) Modulus, GPa		150

Elongation at Break, %		1.0
Elongation at Break, %		25

Poisson's Ratio		0.28
Poisson's Ratio		0.36

Shear Modulus, GPa		86
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		830
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		650
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		440
Specific Heat Capacity, J/kg-K		190

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		6.8

Otherwise Unclassified Properties

Density, g/cm³		8.8
Density, g/cm³		14

Embodied Water, L/kg		480
Embodied Water, L/kg		460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		7.7
Resilience: Ultimate (Unit Rupture Work), MJ/m³		59

Resilience: Unit (Modulus of Resilience), kJ/m³		960
Resilience: Unit (Modulus of Resilience), kJ/m³		90

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		13

Strength to Weight: Axial, points		26
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		23
Thermal Shock Resistance, points		18

Alloy Composition

Carbon (C), %		1.4 to 2.0
Carbon (C), %		0 to 0.010

Chromium (Cr), %		27 to 32
Chromium (Cr), %		0

Cobalt (Co), %		47.5 to 64.1
Cobalt (Co), %		0

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

Iron (Fe), %		0 to 3.0
Iron (Fe), %		0 to 0.010

Molybdenum (Mo), %		0 to 1.0
Molybdenum (Mo), %		0 to 0.020

Nickel (Ni), %		0 to 3.0
Nickel (Ni), %		0 to 0.010

Niobium (Nb), %		0
Niobium (Nb), %		35 to 42

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.020

Silicon (Si), %		0 to 2.0
Silicon (Si), %		0 to 0.0050

Tantalum (Ta), %		0
Tantalum (Ta), %		57.9 to 65

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

Tungsten (W), %		7.5 to 9.5
Tungsten (W), %		0 to 0.050