R05252 Alloy vs. R30012 Cobalt

R05252 alloy belongs to the otherwise unclassified metals classification, while R30012 cobalt belongs to the cobalt alloys. 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 R05252 alloy and the bottom bar is R30012 cobalt.

UNS R05252 Tantalum-Tungsten Alloy UNS R30012 Co-Cr-W Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		220

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

Poisson's Ratio		0.33
Poisson's Ratio		0.28

Shear Modulus, GPa		73
Shear Modulus, GPa		86

Tensile Strength: Ultimate (UTS), MPa		310
Tensile Strength: Ultimate (UTS), MPa		830

Tensile Strength: Yield (Proof), MPa		220
Tensile Strength: Yield (Proof), MPa		650

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		320

Specific Heat Capacity, J/kg-K		140
Specific Heat Capacity, J/kg-K		440

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

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.8

Embodied Water, L/kg		600
Embodied Water, L/kg		480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		63
Resilience: Ultimate (Unit Rupture Work), MJ/m³		7.7

Resilience: Unit (Modulus of Resilience), kJ/m³		120
Resilience: Unit (Modulus of Resilience), kJ/m³		960

Stiffness to Weight: Axial, points		6.5
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		12
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		5.2
Strength to Weight: Axial, points		26

Strength to Weight: Bending, points		6.1
Strength to Weight: Bending, points		22

Thermal Shock Resistance, points		17
Thermal Shock Resistance, points		23

Alloy Composition

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

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

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

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

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

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

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

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

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

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), %		7.5 to 9.5