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R30006 Cobalt vs. Nickel 825

R30006 cobalt belongs to the cobalt alloys classification, while nickel 825 belongs to the nickel alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 R30006 cobalt and the bottom bar is nickel 825.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
34
Fatigue Strength, MPa 260
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 900
650
Tensile Strength: Yield (Proof), MPa 540
260

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1290
1370
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 15
11
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
1.7

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.2
Embodied Carbon, kg CO2/kg material 7.8
7.2
Embodied Energy, MJ/kg 110
100
Embodied Water, L/kg 500
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
180
Resilience: Unit (Modulus of Resilience), kJ/m3 670
170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
22
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 3.9
2.9
Thermal Shock Resistance, points 26
17

Alloy Composition

Aluminum (Al), % 0
0 to 0.2
Carbon (C), % 0.9 to 1.4
0 to 0.050
Chromium (Cr), % 27 to 32
19.5 to 23.5
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 0 to 3.0
22 to 37.9
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
2.5 to 3.5
Nickel (Ni), % 0 to 3.0
38 to 46
Silicon (Si), % 0 to 2.0
0 to 0.050
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0.6 to 1.2
Tungsten (W), % 4.0 to 6.0
0