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R31538 Cobalt vs. EN 2.4889 Nickel

R31538 cobalt belongs to the cobalt alloys classification, while EN 2.4889 nickel belongs to the nickel alloys. They have a modest 29% 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 (7, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is EN 2.4889 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 23
39
Fatigue Strength, MPa 310 to 480
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
720
Tensile Strength: Yield (Proof), MPa 580 to 930
270

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Melting Completion (Liquidus), °C 1360
1350
Melting Onset (Solidus), °C 1290
1300
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
13
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
1.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.1
6.9
Embodied Energy, MJ/kg 110
98
Embodied Water, L/kg 530
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
220
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
180
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 34 to 45
25
Strength to Weight: Bending, points 27 to 32
22
Thermal Diffusivity, mm2/s 3.5
3.4
Thermal Shock Resistance, points 25 to 33
19

Alloy Composition

Carbon (C), % 0.15 to 0.35
0.050 to 0.12
Cerium (Ce), % 0
0.030 to 0.090
Chromium (Cr), % 26 to 30
26 to 29
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 0.75
21 to 25
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
45 to 50.4
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
2.5 to 3.0
Sulfur (S), % 0
0 to 0.010