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R31539 Cobalt vs. Nickel 693

R31539 cobalt belongs to the cobalt alloys classification, while nickel 693 belongs to the nickel alloys. They have a modest 30% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 R31539 cobalt and the bottom bar is nickel 693.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 22
34
Fatigue Strength, MPa 310 to 480
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
660
Tensile Strength: Yield (Proof), MPa 590 to 940
310

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Melting Completion (Liquidus), °C 1360
1350
Melting Onset (Solidus), °C 1290
1310
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
9.1
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.1
Embodied Carbon, kg CO2/kg material 8.2
9.9
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 530
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
190
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
250
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
23
Strength to Weight: Bending, points 27 to 32
21
Thermal Diffusivity, mm2/s 3.5
2.3
Thermal Shock Resistance, points 24 to 32
19

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
2.5 to 4.0
Carbon (C), % 0 to 0.14
0 to 0.15
Chromium (Cr), % 26 to 30
27 to 31
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 0.75
2.5 to 6.0
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
0
Nickel (Ni), % 0 to 1.0
53.3 to 67.5
Niobium (Nb), % 0
0.5 to 2.5
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 1.0