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R31233 Cobalt vs. Grade FDC Steel

R31233 cobalt belongs to the cobalt alloys classification, while grade FDC 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 FDC 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
1680

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1350
1450
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 12
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.2

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 8.4
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 480
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
60
Strength to Weight: Bending, points 26
40
Thermal Diffusivity, mm2/s 3.2
14
Thermal Shock Resistance, points 25
50

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.6 to 0.75
Chromium (Cr), % 23.5 to 27.5
0 to 0.3
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0 to 0.12
Iron (Fe), % 1.0 to 5.0
98 to 99.4
Manganese (Mn), % 0.1 to 1.5
0.5 to 1.2
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
0.1 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 1.0 to 3.0
0