EN 2.4964 Cobalt vs. SAE-AISI M47 Steel

EN 2.4964 cobalt belongs to the cobalt alloys classification, while SAE-AISI M47 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 2.4964 cobalt and the bottom bar is SAE-AISI M47 steel.

EN 2.4964 (CoCr20W15Ni) Cobalt Alloy SAE-AISI M47 (T11347) Molybdenum High-Speed Steel

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.29
Poisson's Ratio		0.29

Shear Modulus, GPa		86
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		960
Tensile Strength: Ultimate (UTS), MPa		810 to 2310

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1630
Melting Completion (Liquidus), °C		1540

Melting Onset (Solidus), °C		1550
Melting Onset (Solidus), °C		1500

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		450

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		23

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		11

Otherwise Unclassified Properties

Density, g/cm³		9.6
Density, g/cm³		8.1

Embodied Carbon, kg CO₂/kg material		9.8
Embodied Carbon, kg CO₂/kg material		7.4

Embodied Energy, MJ/kg		140
Embodied Energy, MJ/kg		100

Embodied Water, L/kg		450
Embodied Water, L/kg		120

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		21
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		28
Strength to Weight: Axial, points		28 to 79

Strength to Weight: Bending, points		23
Strength to Weight: Bending, points		24 to 48

Thermal Diffusivity, mm²/s		3.9
Thermal Diffusivity, mm²/s		6.3

Thermal Shock Resistance, points		25
Thermal Shock Resistance, points		27 to 77

Alloy Composition

Carbon (C), %		0.050 to 0.15
Carbon (C), %		1.1 to 1.2

Chromium (Cr), %		19 to 21
Chromium (Cr), %		3.5 to 4.0

Cobalt (Co), %		46.4 to 58
Cobalt (Co), %		4.8 to 5.3

Copper (Cu), %		0
Copper (Cu), %		0 to 0.25

Iron (Fe), %		0 to 3.0
Iron (Fe), %		78.7 to 85

Manganese (Mn), %		0 to 2.0
Manganese (Mn), %		0.15 to 0.4

Molybdenum (Mo), %		0
Molybdenum (Mo), %		9.3 to 10

Nickel (Ni), %		9.0 to 11
Nickel (Ni), %		0 to 0.3

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0 to 0.4
Silicon (Si), %		0.2 to 0.45

Sulfur (S), %		0 to 0.015
Sulfur (S), %		0 to 0.030

Tungsten (W), %		14 to 16
Tungsten (W), %		1.3 to 1.8

Vanadium (V), %		0
Vanadium (V), %		1.2 to 1.4