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R30816 Cobalt vs. Grade M35-2 Nickel

R30816 cobalt belongs to the cobalt alloys classification, while grade M35-2 nickel belongs to the nickel alloys. They have a modest 23% 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 (6, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is grade M35-2 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
160
Elongation at Break, % 23
28
Fatigue Strength, MPa 250
160
Poisson's Ratio 0.3
0.32
Shear Modulus, GPa 81
62
Tensile Strength: Ultimate (UTS), MPa 1020
500
Tensile Strength: Yield (Proof), MPa 460
230

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1540
1280
Melting Onset (Solidus), °C 1460
1230
Specific Heat Capacity, J/kg-K 420
430
Thermal Conductivity, W/m-K 13
22
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.8
Embodied Carbon, kg CO2/kg material 20
8.1
Embodied Energy, MJ/kg 320
110
Embodied Water, L/kg 440
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 510
170
Stiffness to Weight: Axial, points 13
10
Stiffness to Weight: Bending, points 22
21
Strength to Weight: Axial, points 31
16
Strength to Weight: Bending, points 25
16
Thermal Diffusivity, mm2/s 3.3
5.7
Thermal Shock Resistance, points 28
17

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.35
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
26 to 33
Iron (Fe), % 0 to 5.0
0 to 3.5
Manganese (Mn), % 1.0 to 2.0
0 to 1.5
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
59.1 to 74
Niobium (Nb), % 3.5 to 4.5
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0