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R30605 Cobalt vs. EN 2.4856 Nickel

R30605 cobalt belongs to the cobalt alloys classification, while EN 2.4856 nickel belongs to the nickel alloys. They have a modest 33% 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 R30605 cobalt and the bottom bar is EN 2.4856 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
28
Fatigue Strength, MPa 260 to 590
280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
79
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
880
Tensile Strength: Yield (Proof), MPa 470 to 1600
430

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1330
1430
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 9.6
10
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
1.4

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.6
Embodied Carbon, kg CO2/kg material 9.8
14
Embodied Energy, MJ/kg 140
190
Embodied Water, L/kg 450
290

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 33 to 55
28
Strength to Weight: Bending, points 25 to 36
24
Thermal Diffusivity, mm2/s 2.5
2.7
Thermal Shock Resistance, points 31 to 52
29

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0.050 to 0.15
0.030 to 0.1
Chromium (Cr), % 19 to 21
20 to 23
Cobalt (Co), % 46.4 to 57
0 to 1.0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 3.0
0 to 5.0
Manganese (Mn), % 1.0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 9.0 to 11
58 to 68.8
Niobium (Nb), % 0
3.2 to 4.2
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0 to 0.4
Tungsten (W), % 14 to 16
0