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Nickel 686 vs. R30035 Cobalt

Nickel 686 belongs to the nickel alloys classification, while R30035 cobalt belongs to the cobalt alloys. They have 66% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220 to 230
Elongation at Break, % 51
9.0 to 46
Fatigue Strength, MPa 410
170 to 740
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
84 to 89
Tensile Strength: Ultimate (UTS), MPa 780
900 to 1900
Tensile Strength: Yield (Proof), MPa 350
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1380
1440
Melting Onset (Solidus), °C 1340
1320
Specific Heat Capacity, J/kg-K 420
440
Thermal Conductivity, W/m-K 9.8
11
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 70
100
Density, g/cm3 9.0
8.7
Embodied Carbon, kg CO2/kg material 12
10
Embodied Energy, MJ/kg 170
140
Embodied Water, L/kg 300
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 280
210 to 5920
Stiffness to Weight: Axial, points 14
14 to 15
Stiffness to Weight: Bending, points 22
23 to 24
Strength to Weight: Axial, points 24
29 to 61
Strength to Weight: Bending, points 21
24 to 39
Thermal Diffusivity, mm2/s 2.6
3.0
Thermal Shock Resistance, points 21
23 to 46

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0 to 0.010
0 to 0.025
Chromium (Cr), % 19 to 23
19 to 21
Cobalt (Co), % 0
29.1 to 39
Iron (Fe), % 0 to 5.0
0 to 1.0
Manganese (Mn), % 0 to 0.75
0 to 0.15
Molybdenum (Mo), % 15 to 17
9.0 to 10.5
Nickel (Ni), % 49.5 to 63
33 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.080
0 to 0.15
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0.020 to 0.25
0 to 1.0
Tungsten (W), % 3.0 to 4.4
0