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R30816 Cobalt vs. N06255 Nickel

R30816 cobalt belongs to the cobalt alloys classification, while N06255 nickel belongs to the nickel alloys. They have 49% of their average alloy composition in common. There are 23 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 R30816 cobalt and the bottom bar is N06255 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
45
Fatigue Strength, MPa 250
210
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
81
Tensile Strength: Ultimate (UTS), MPa 1020
660
Tensile Strength: Yield (Proof), MPa 460
250

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1540
1470
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 420
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.5
Embodied Carbon, kg CO2/kg material 20
9.4
Embodied Energy, MJ/kg 320
130
Embodied Water, L/kg 440
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
230
Resilience: Unit (Modulus of Resilience), kJ/m3 510
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 31
22
Strength to Weight: Bending, points 25
20
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.030
Chromium (Cr), % 19 to 21
23 to 26
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 1.2
Iron (Fe), % 0 to 5.0
6.0 to 24
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
6.0 to 9.0
Nickel (Ni), % 19 to 21
47 to 52
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Titanium (Ti), % 0
0 to 0.69
Tungsten (W), % 3.5 to 4.5
0 to 3.0