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R30075 Cobalt vs. N06255 Nickel

R30075 cobalt belongs to the cobalt alloys classification, while N06255 nickel belongs to the nickel alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is N06255 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
210
Elongation at Break, % 12
45
Fatigue Strength, MPa 250 to 840
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 82 to 98
81
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
660
Tensile Strength: Yield (Proof), MPa 480 to 840
250

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1470
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.1
9.4
Embodied Energy, MJ/kg 110
130
Embodied Water, L/kg 530
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
230
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
150
Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
23
Strength to Weight: Axial, points 26 to 42
22
Strength to Weight: Bending, points 22 to 31
20
Thermal Shock Resistance, points 21 to 29
17

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.030
Chromium (Cr), % 27 to 30
23 to 26
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
0 to 1.2
Iron (Fe), % 0 to 0.75
6.0 to 24
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
6.0 to 9.0
Nickel (Ni), % 0 to 0.5
47 to 52
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0 to 0.69
Tungsten (W), % 0 to 0.2
0 to 3.0