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Nickel 693 vs. R31537 Cobalt

Nickel 693 belongs to the nickel alloys classification, while R31537 cobalt belongs to the cobalt 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 nickel 693 and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 34
14 to 23
Fatigue Strength, MPa 230
310 to 480
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
87
Tensile Strength: Ultimate (UTS), MPa 660
1000 to 1340
Tensile Strength: Yield (Proof), MPa 310
590 to 940

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 250
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
33 to 44
Strength to Weight: Bending, points 21
26 to 32
Thermal Diffusivity, mm2/s 2.3
3.4
Thermal Shock Resistance, points 19
24 to 32

Alloy Composition

Aluminum (Al), % 2.5 to 4.0
0
Carbon (C), % 0 to 0.15
0 to 0.14
Chromium (Cr), % 27 to 31
26 to 30
Cobalt (Co), % 0
58.9 to 69
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 2.5 to 6.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 53.3 to 67.5
0 to 1.0
Niobium (Nb), % 0.5 to 2.5
0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 1.0
0