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Nickel 825 vs. R30816 Cobalt

Nickel 825 belongs to the nickel alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have 46% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is nickel 825 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
23
Fatigue Strength, MPa 190
250
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 650
1020
Tensile Strength: Yield (Proof), MPa 260
460

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1400
1540
Melting Onset (Solidus), °C 1370
1460
Specific Heat Capacity, J/kg-K 460
420
Thermal Conductivity, W/m-K 11
13
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 8.2
9.1
Embodied Carbon, kg CO2/kg material 7.2
20
Embodied Energy, MJ/kg 100
320
Embodied Water, L/kg 230
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
190
Resilience: Unit (Modulus of Resilience), kJ/m3 170
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 22
31
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 2.9
3.3
Thermal Shock Resistance, points 17
28

Alloy Composition

Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0 to 0.050
0.32 to 0.42
Chromium (Cr), % 19.5 to 23.5
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 1.5 to 3.0
0
Iron (Fe), % 22 to 37.9
0 to 5.0
Manganese (Mn), % 0 to 1.0
1.0 to 2.0
Molybdenum (Mo), % 2.5 to 3.5
3.5 to 4.5
Nickel (Ni), % 38 to 46
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.050
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0.6 to 1.2
0
Tungsten (W), % 0
3.5 to 4.5