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G-CoCr28 Cobalt vs. SAE-AISI S6 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while SAE-AISI S6 steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. 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 S6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 83
72
Tensile Strength: Ultimate (UTS), MPa 560
670 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1330
1430
Melting Onset (Solidus), °C 1270
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 8.5
41
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 100
3.2
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.2
2.3
Embodied Energy, MJ/kg 84
33
Embodied Water, L/kg 440
56

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
24 to 70
Strength to Weight: Bending, points 19
22 to 45
Thermal Diffusivity, mm2/s 2.2
11
Thermal Shock Resistance, points 14
22 to 64

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.4 to 0.5
Chromium (Cr), % 27 to 30
1.2 to 1.5
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 9.7 to 24.5
92.8 to 94.7
Manganese (Mn), % 0 to 1.5
1.2 to 1.5
Molybdenum (Mo), % 0 to 0.5
0.3 to 0.5
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.5 to 1.5
2.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.2 to 0.4