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R31537 Cobalt vs. EN 2.4650 Nickel

R31537 cobalt belongs to the cobalt alloys classification, while EN 2.4650 nickel belongs to the nickel alloys. They have 47% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R31537 cobalt and the bottom bar is EN 2.4650 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 14 to 23
34
Fatigue Strength, MPa 310 to 480
480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 87
80
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
1090
Tensile Strength: Yield (Proof), MPa 590 to 940
650

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1400
Melting Onset (Solidus), °C 1290
1350
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
12
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
10
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 530
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
320
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 1990
1030
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
36
Strength to Weight: Bending, points 26 to 32
28
Thermal Diffusivity, mm2/s 3.4
3.1
Thermal Shock Resistance, points 24 to 32
33

Alloy Composition

Aluminum (Al), % 0
0.3 to 0.6
Boron (B), % 0
0 to 0.0050
Carbon (C), % 0 to 0.14
0.040 to 0.080
Chromium (Cr), % 26 to 30
19 to 21
Cobalt (Co), % 58.9 to 69
19 to 21
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 0 to 0.75
0 to 0.7
Manganese (Mn), % 0 to 1.0
0 to 0.6
Molybdenum (Mo), % 5.0 to 7.0
5.6 to 6.1
Nickel (Ni), % 0 to 1.0
46.9 to 54.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0
0 to 0.0070
Titanium (Ti), % 0
1.9 to 2.4