G-CoCr28 Cobalt vs. K93500 Alloy

G-CoCr28 cobalt belongs to the cobalt alloys classification, while K93500 alloy belongs to the iron alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is K93500 alloy.

G-CoCr28 (2.4778) Cobalt-Chromium Alloy UNS K93500 Low Expansion Alloy

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		0.3

Shear Modulus, GPa		83
Shear Modulus, GPa		72

Tensile Strength: Ultimate (UTS), MPa		560
Tensile Strength: Ultimate (UTS), MPa		490 to 810

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1330
Melting Completion (Liquidus), °C		1430

Melting Onset (Solidus), °C		1270
Melting Onset (Solidus), °C		1380

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		460

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

Otherwise Unclassified Properties

Base Metal Price, % relative		100
Base Metal Price, % relative		30

Density, g/cm³		8.1
Density, g/cm³		8.2

Embodied Carbon, kg CO₂/kg material		6.2
Embodied Carbon, kg CO₂/kg material		4.7

Embodied Energy, MJ/kg		84
Embodied Energy, MJ/kg		65

Embodied Water, L/kg		440
Embodied Water, L/kg		130

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		23

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		17 to 27

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		17 to 23

Thermal Shock Resistance, points		14
Thermal Shock Resistance, points		15 to 25

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.1

Carbon (C), %		0.050 to 0.25
Carbon (C), %		0 to 0.050

Chromium (Cr), %		27 to 30
Chromium (Cr), %		0 to 0.25

Cobalt (Co), %		48 to 52
Cobalt (Co), %		5.0

Iron (Fe), %		9.7 to 24.5
Iron (Fe), %		61.4 to 63

Magnesium (Mg), %		0
Magnesium (Mg), %		0 to 0.1

Manganese (Mn), %		0 to 1.5
Manganese (Mn), %		0 to 0.6

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

Nickel (Ni), %		0 to 4.0
Nickel (Ni), %		32

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

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.015

Silicon (Si), %		0.5 to 1.5
Silicon (Si), %		0 to 0.25

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

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.1

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.1