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N08221 Nickel vs. R30021 Cobalt

N08221 nickel belongs to the nickel alloys classification, while R30021 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 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is N08221 nickel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 34
9.0
Fatigue Strength, MPa 190
250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
86
Tensile Strength: Ultimate (UTS), MPa 610
700
Tensile Strength: Yield (Proof), MPa 270
500

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Melting Completion (Liquidus), °C 1440
1350
Melting Onset (Solidus), °C 1390
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 7.9
8.0
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 240
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
57
Resilience: Unit (Modulus of Resilience), kJ/m3 170
570
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
23
Strength to Weight: Bending, points 19
21
Thermal Shock Resistance, points 16
21

Alloy Composition

Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0 to 0.025
0.2 to 0.35
Chromium (Cr), % 20 to 22
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 1.5 to 3.0
0
Iron (Fe), % 22 to 33.9
0 to 3.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 6.5
4.5 to 6.0
Nickel (Ni), % 39 to 46
2.0 to 3.0
Silicon (Si), % 0 to 0.050
0 to 1.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0.6 to 1.0
0