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G-CoCr28 Cobalt vs. EN 1.3558 Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while EN 1.3558 steel belongs to the iron alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 EN 1.3558 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 83
80
Tensile Strength: Ultimate (UTS), MPa 560
770

Thermal Properties

Latent Heat of Fusion, J/g 320
240
Maximum Temperature: Mechanical, °C 1200
490
Melting Completion (Liquidus), °C 1330
1810
Melting Onset (Solidus), °C 1270
1760
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 8.5
20
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 100
45
Density, g/cm3 8.1
9.3
Embodied Carbon, kg CO2/kg material 6.2
8.4
Embodied Energy, MJ/kg 84
130
Embodied Water, L/kg 440
90

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 19
23
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 2.2
5.3
Thermal Shock Resistance, points 14
22

Alloy Composition

Carbon (C), % 0.050 to 0.25
0.7 to 0.8
Chromium (Cr), % 27 to 30
3.9 to 4.3
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 9.7 to 24.5
73.7 to 77.6
Manganese (Mn), % 0 to 1.5
0 to 0.4
Molybdenum (Mo), % 0 to 0.5
0 to 0.6
Nickel (Ni), % 0 to 4.0
0
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0.5 to 1.5
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
1.0 to 1.3