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R31539 Cobalt vs. N07776 Nickel

R31539 cobalt belongs to the cobalt alloys classification, while N07776 nickel belongs to the nickel alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is N07776 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 22
39
Fatigue Strength, MPa 310 to 480
220
Poisson's Ratio 0.29
0.3
Reduction in Area, % 13 to 23
57
Shear Modulus, GPa 86
79
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
700
Tensile Strength: Yield (Proof), MPa 590 to 940
270

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1550
Melting Onset (Solidus), °C 1290
1500
Specific Heat Capacity, J/kg-K 450
430
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 8.2
15
Embodied Energy, MJ/kg 110
210
Embodied Water, L/kg 530
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
220
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
180
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
22
Strength to Weight: Bending, points 27 to 32
20
Thermal Shock Resistance, points 24 to 32
20

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0 to 2.0
Carbon (C), % 0 to 0.14
0 to 0.030
Chromium (Cr), % 26 to 30
12 to 22
Cobalt (Co), % 57.7 to 68.7
0
Iron (Fe), % 0 to 0.75
0 to 24.5
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
9.0 to 15
Nickel (Ni), % 0 to 1.0
50 to 60
Niobium (Nb), % 0
4.0 to 6.0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 1.0
Tungsten (W), % 0
0.5 to 2.5