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R31233 Cobalt vs. SAE-AISI F2 Steel

R31233 cobalt belongs to the cobalt alloys classification, while SAE-AISI F2 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is SAE-AISI F2 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
73
Tensile Strength: Ultimate (UTS), MPa 1020
710 to 2360

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1350
1520
Melting Onset (Solidus), °C 1330
1470
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
42
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.5

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 8.4
2.3
Embodied Energy, MJ/kg 110
32
Embodied Water, L/kg 480
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
24 to 81
Strength to Weight: Bending, points 26
22 to 49
Thermal Diffusivity, mm2/s 3.2
11
Thermal Shock Resistance, points 25
21 to 71

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
1.2 to 1.4
Chromium (Cr), % 23.5 to 27.5
0.2 to 0.4
Cobalt (Co), % 44.7 to 63.3
0
Iron (Fe), % 1.0 to 5.0
92.6 to 95.4
Manganese (Mn), % 0.1 to 1.5
0.1 to 0.5
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 0.5
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 1.0 to 3.0
3.0 to 4.5