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R31233 Cobalt vs. EN 1.4547 Stainless Steel

R31233 cobalt belongs to the cobalt alloys classification, while EN 1.4547 stainless steel belongs to the iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 EN 1.4547 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 17
39
Fatigue Strength, MPa 220
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 85
80
Tensile Strength: Ultimate (UTS), MPa 1020
750
Tensile Strength: Yield (Proof), MPa 420
340

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1350
1470
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 440
460
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.0
Embodied Carbon, kg CO2/kg material 8.4
5.6
Embodied Energy, MJ/kg 110
75
Embodied Water, L/kg 480
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
240
Resilience: Unit (Modulus of Resilience), kJ/m3 410
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 33
26
Strength to Weight: Bending, points 26
23
Thermal Diffusivity, mm2/s 3.2
3.8
Thermal Shock Resistance, points 25
16

Alloy Composition

Boron (B), % 0 to 0.015
0
Carbon (C), % 0.020 to 0.1
0 to 0.020
Chromium (Cr), % 23.5 to 27.5
19.5 to 20.5
Cobalt (Co), % 44.7 to 63.3
0
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 1.0 to 5.0
51 to 56.3
Manganese (Mn), % 0.1 to 1.5
0 to 1.0
Molybdenum (Mo), % 4.0 to 6.0
6.0 to 7.0
Nickel (Ni), % 7.0 to 11
17.5 to 18.5
Nitrogen (N), % 0.030 to 0.12
0.18 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.050 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.020
0 to 0.010
Tungsten (W), % 1.0 to 3.0
0