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R31233 Cobalt vs. EN 1.8153 Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.8153 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31233 cobalt and the bottom bar is EN 1.8153 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
72
Tensile Strength: Ultimate (UTS), MPa 1020
670 to 2040

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1330
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 12
45
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
8.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.7
Embodied Carbon, kg CO2/kg material 8.4
1.8
Embodied Energy, MJ/kg 110
25
Embodied Water, L/kg 480
48

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 33
24 to 74
Strength to Weight: Bending, points 26
22 to 46
Thermal Diffusivity, mm2/s 3.2
12
Thermal Shock Resistance, points 25
20 to 62

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0.56 to 0.64
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
95.7 to 96.9
Manganese (Mn), % 0.1 to 1.5
0.7 to 1.0
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 0.025
Silicon (Si), % 0.050 to 1.0
1.5 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 1.0 to 3.0
0
Vanadium (V), % 0
0.1 to 0.2