G-CoCr28 Cobalt vs. SAE-AISI P20 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI P20 steel belongs to the iron alloys. There are 21 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 G-CoCr28 cobalt and the bottom bar is SAE-AISI P20 steel.

G-CoCr28 (2.4778) Cobalt-Chromium Alloy SAE-AISI P20 (T51620) Low-Carbon Mould Steel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		190

Poisson's Ratio		0.28
Poisson's Ratio		0.29

Shear Modulus, GPa		83
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		560
Tensile Strength: Ultimate (UTS), MPa		540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		1330
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1270
Melting Onset (Solidus), °C		1420

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		470

Thermal Conductivity, W/m-K		8.5
Thermal Conductivity, W/m-K		45

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		100
Base Metal Price, % relative		2.8

Density, g/cm³		8.1
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		6.2
Embodied Carbon, kg CO₂/kg material		1.6

Embodied Energy, MJ/kg		84
Embodied Energy, MJ/kg		21

Embodied Water, L/kg		440
Embodied Water, L/kg		52

Common Calculations

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		13

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

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		19 to 37

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		19 to 29

Thermal Diffusivity, mm²/s		2.2
Thermal Diffusivity, mm²/s		12

Thermal Shock Resistance, points		14
Thermal Shock Resistance, points		18 to 35

Alloy Composition

Carbon (C), %		0.050 to 0.25
Carbon (C), %		0.28 to 0.4

Chromium (Cr), %		27 to 30
Chromium (Cr), %		0.4 to 2.0

Cobalt (Co), %		48 to 52
Cobalt (Co), %		0

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

Iron (Fe), %		9.7 to 24.5
Iron (Fe), %		95.2 to 98.5

Manganese (Mn), %		0 to 1.5
Manganese (Mn), %		0.35 to 0.71

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		0.3 to 0.55

Nickel (Ni), %		0 to 4.0
Nickel (Ni), %		0

Niobium (Nb), %		0 to 0.5
Niobium (Nb), %		0

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.030

Silicon (Si), %		0.5 to 1.5
Silicon (Si), %		0.2 to 0.8

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