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R31538 Cobalt vs. N10665 Nickel

R31538 cobalt belongs to the cobalt alloys classification, while N10665 nickel belongs to the nickel alloys. 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 N10665 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 13 to 23
45
Fatigue Strength, MPa 310 to 480
340
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
84
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
860
Tensile Strength: Yield (Proof), MPa 580 to 930
400

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Melting Completion (Liquidus), °C 1360
1620
Melting Onset (Solidus), °C 1290
1570
Specific Heat Capacity, J/kg-K 450
390
Thermal Conductivity, W/m-K 13
11
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.3
Embodied Carbon, kg CO2/kg material 8.1
15
Embodied Energy, MJ/kg 110
200
Embodied Water, L/kg 530
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
320
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
360
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 34 to 45
26
Strength to Weight: Bending, points 27 to 32
22
Thermal Diffusivity, mm2/s 3.5
3.1
Thermal Shock Resistance, points 25 to 33
27

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.020
Chromium (Cr), % 26 to 30
0 to 1.0
Cobalt (Co), % 58.7 to 68.9
0 to 1.0
Iron (Fe), % 0 to 0.75
0 to 2.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
26 to 30
Nickel (Ni), % 0 to 1.0
64.8 to 74
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0
0 to 0.030