R05252 Alloy vs. R30605 Cobalt

R05252 alloy belongs to the otherwise unclassified metals classification, while R30605 cobalt belongs to the cobalt alloys. 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 R05252 alloy and the bottom bar is R30605 cobalt.

UNS R05252 Tantalum-Tungsten Alloy UNS R30605 (L605, Alloy 25, 2.4964) Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		23
Elongation at Break, %		34

Poisson's Ratio		0.33
Poisson's Ratio		0.29

Shear Modulus, GPa		73
Shear Modulus, GPa		81

Tensile Strength: Ultimate (UTS), MPa		310
Tensile Strength: Ultimate (UTS), MPa		1130 to 1900

Tensile Strength: Yield (Proof), MPa		220
Tensile Strength: Yield (Proof), MPa		470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		290

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		410

Thermal Expansion, µm/m-K		6.7
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		9.6

Embodied Water, L/kg		600
Embodied Water, L/kg		450

Common Calculations

Stiffness to Weight: Axial, points		6.5
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		21

Strength to Weight: Axial, points		5.2
Strength to Weight: Axial, points		33 to 55

Strength to Weight: Bending, points		6.1
Strength to Weight: Bending, points		25 to 36

Thermal Shock Resistance, points		17
Thermal Shock Resistance, points		31 to 52

Alloy Composition

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

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

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

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

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

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

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

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		9.0 to 11

Niobium (Nb), %		0 to 0.1
Niobium (Nb), %		0

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

Oxygen (O), %		0 to 0.015
Oxygen (O), %		0

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

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

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

Tantalum (Ta), %		88.8 to 91
Tantalum (Ta), %		0

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

Tungsten (W), %		9.0 to 11
Tungsten (W), %		14 to 16