R30605 Cobalt vs. R04295 Alloy

R30605 cobalt belongs to the cobalt alloys classification, while R04295 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 R04295 alloy.

UNS R30605 (L605, Alloy 25, 2.4964) Alloy UNS R04295 Niobium-Hafnium Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		100

Elongation at Break, %		34
Elongation at Break, %		22

Poisson's Ratio		0.29
Poisson's Ratio		0.38

Shear Modulus, GPa		81
Shear Modulus, GPa		37

Tensile Strength: Ultimate (UTS), MPa		1130 to 1900
Tensile Strength: Ultimate (UTS), MPa		410

Tensile Strength: Yield (Proof), MPa		470 to 1600
Tensile Strength: Yield (Proof), MPa		300

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		300

Specific Heat Capacity, J/kg-K		410
Specific Heat Capacity, J/kg-K		260

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		7.2

Otherwise Unclassified Properties

Density, g/cm³		9.6
Density, g/cm³		9.0

Embodied Water, L/kg		450
Embodied Water, L/kg		950

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		17

Strength to Weight: Axial, points		33 to 55
Strength to Weight: Axial, points		13

Strength to Weight: Bending, points		25 to 36
Strength to Weight: Bending, points		14

Thermal Shock Resistance, points		31 to 52
Thermal Shock Resistance, points		40

Alloy Composition

Carbon (C), %		0.050 to 0.15
Carbon (C), %		0 to 0.015

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

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

Hafnium (Hf), %		0
Hafnium (Hf), %		9.0 to 11

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

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

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

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

Niobium (Nb), %		0
Niobium (Nb), %		85.9 to 90.3

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

Oxygen (O), %		0
Oxygen (O), %		0 to 0.025

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

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

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

Tantalum (Ta), %		0
Tantalum (Ta), %		0 to 0.5

Titanium (Ti), %		0
Titanium (Ti), %		0.7 to 1.3

Tungsten (W), %		14 to 16
Tungsten (W), %		0 to 0.5

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.7