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EN 2.4951 Nickel vs. R31538 Cobalt

EN 2.4951 nickel belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt alloys. They have a modest 24% 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 (6, in this case) are not shown.

For each property being compared, the top bar is EN 2.4951 nickel and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 34
13 to 23
Fatigue Strength, MPa 200
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 750
1020 to 1360
Tensile Strength: Yield (Proof), MPa 270
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1360
Melting Onset (Solidus), °C 1310
1290
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 12
13
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.5
8.4
Embodied Carbon, kg CO2/kg material 9.3
8.1
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 280
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 190
750 to 1920
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 25
34 to 45
Strength to Weight: Bending, points 22
27 to 32
Thermal Diffusivity, mm2/s 3.1
3.5
Thermal Shock Resistance, points 23
25 to 33

Alloy Composition

Aluminum (Al), % 0 to 0.3
0
Carbon (C), % 0.080 to 0.15
0.15 to 0.35
Chromium (Cr), % 18 to 21
26 to 30
Cobalt (Co), % 0 to 5.0
58.7 to 68.9
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 5.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 65.4 to 81.7
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.2 to 0.6
0