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R31233 Cobalt vs. Grade FDSiCrV Steel

R31233 cobalt belongs to the cobalt alloys classification, while grade FDSiCrV steel belongs to the iron alloys. 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 R31233 cobalt and the bottom bar is grade FDSiCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 85
80
Tensile Strength: Ultimate (UTS), MPa 1020
2100

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 12
47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.6

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 8.4
1.9
Embodied Energy, MJ/kg 110
26
Embodied Water, L/kg 480
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
75
Strength to Weight: Bending, points 26
47
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 25
63

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.5 to 0.7
Chromium (Cr), % 23.5 to 27.5
0.5 to 1.0
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0 to 0.12
Iron (Fe), % 1.0 to 5.0
96 to 97.8
Manganese (Mn), % 0.1 to 1.5
0.4 to 0.9
Molybdenum (Mo), % 4.0 to 6.0
0
Nickel (Ni), % 7.0 to 11
0
Nitrogen (N), % 0.030 to 0.12
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
1.2 to 1.7
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 1.0 to 3.0
0
Vanadium (V), % 0
0.1 to 0.25