R30605 Cobalt vs. R05240 Alloy

R30605 cobalt belongs to the cobalt alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 16 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 R30605 cobalt and the bottom bar is R05240 alloy.

UNS R30605 (L605, Alloy 25, 2.4964) Alloy UNS R05240 Tantalum-Niobium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		150

Elongation at Break, %		34
Elongation at Break, %		25

Poisson's Ratio		0.29
Poisson's Ratio		0.36

Shear Modulus, GPa		81
Shear Modulus, GPa		57

Tensile Strength: Ultimate (UTS), MPa		1130 to 1900
Tensile Strength: Ultimate (UTS), MPa		270

Tensile Strength: Yield (Proof), MPa		470 to 1600
Tensile Strength: Yield (Proof), MPa		170

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		210

Specific Heat Capacity, J/kg-K		410
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		9.6
Density, g/cm³		14

Embodied Water, L/kg		450
Embodied Water, L/kg		460

Common Calculations

Stiffness to Weight: Axial, points		12
Stiffness to Weight: Axial, points		6.3

Stiffness to Weight: Bending, points		21
Stiffness to Weight: Bending, points		13

Strength to Weight: Axial, points		33 to 55
Strength to Weight: Axial, points		5.4

Strength to Weight: Bending, points		25 to 36
Strength to Weight: Bending, points		6.8

Thermal Shock Resistance, points		31 to 52
Thermal Shock Resistance, points		18

Alloy Composition

Carbon (C), %		0.050 to 0.15
Carbon (C), %		0 to 0.010

Chromium (Cr), %		19 to 21
Chromium (Cr), %		0

Cobalt (Co), %		46.4 to 57
Cobalt (Co), %		0

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

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

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

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

Nickel (Ni), %		9.0 to 11
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

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

Silicon (Si), %		0 to 0.4
Silicon (Si), %		0 to 0.0050

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

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

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

Tungsten (W), %		14 to 16
Tungsten (W), %		0 to 0.050