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R30816 Cobalt vs. EN 2.4889 Nickel

R30816 cobalt belongs to the cobalt alloys classification, while EN 2.4889 nickel belongs to the nickel alloys. They have 44% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 2.4889 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
39
Fatigue Strength, MPa 250
210
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 1020
720
Tensile Strength: Yield (Proof), MPa 460
270

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Melting Completion (Liquidus), °C 1540
1350
Melting Onset (Solidus), °C 1460
1300
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
13
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.0
Embodied Carbon, kg CO2/kg material 20
6.9
Embodied Energy, MJ/kg 320
98
Embodied Water, L/kg 440
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
220
Resilience: Unit (Modulus of Resilience), kJ/m3 510
180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
25
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 3.3
3.4
Thermal Shock Resistance, points 28
19

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.050 to 0.12
Cerium (Ce), % 0
0.030 to 0.090
Chromium (Cr), % 19 to 21
26 to 29
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 5.0
21 to 25
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
45 to 50.4
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
2.5 to 3.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0