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Nickel 825 vs. R30006 Cobalt

Nickel 825 belongs to the nickel alloys classification, while R30006 cobalt belongs to the cobalt 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 nickel 825 and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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