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R31538 Cobalt vs. EN 2.4668 Nickel

R31538 cobalt belongs to the cobalt alloys classification, while EN 2.4668 nickel belongs to the nickel alloys. They have a modest 24% 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 (6, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is EN 2.4668 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 23
14
Fatigue Strength, MPa 310 to 480
590
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
75
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
1390
Tensile Strength: Yield (Proof), MPa 580 to 930
1160

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1410
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
13
Embodied Energy, MJ/kg 110
190
Embodied Water, L/kg 530
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
180
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
3490
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
46
Strength to Weight: Bending, points 27 to 32
33
Thermal Diffusivity, mm2/s 3.5
3.5
Thermal Shock Resistance, points 25 to 33
40

Alloy Composition

Aluminum (Al), % 0
0.3 to 0.7
Boron (B), % 0
0.0020 to 0.0060
Carbon (C), % 0.15 to 0.35
0.020 to 0.080
Chromium (Cr), % 26 to 30
17 to 21
Cobalt (Co), % 58.7 to 68.9
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 0.75
11.2 to 24.6
Manganese (Mn), % 0 to 1.0
0 to 0.35
Molybdenum (Mo), % 5.0 to 7.0
2.8 to 3.3
Nickel (Ni), % 0 to 1.0
50 to 55
Niobium (Nb), % 0
4.7 to 5.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.35
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.6 to 1.2