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EN 2.4878 Nickel vs. R30021 Cobalt

EN 2.4878 nickel belongs to the nickel alloys classification, while R30021 cobalt belongs to the cobalt alloys. They have 49% of their average alloy composition in common. There are 25 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 EN 2.4878 nickel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 13 to 17
9.0
Fatigue Strength, MPa 400 to 410
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
86
Tensile Strength: Ultimate (UTS), MPa 1210 to 1250
700
Tensile Strength: Yield (Proof), MPa 740 to 780
500

Thermal Properties

Latent Heat of Fusion, J/g 330
330
Melting Completion (Liquidus), °C 1370
1350
Melting Onset (Solidus), °C 1320
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 10
8.0
Embodied Energy, MJ/kg 150
110
Embodied Water, L/kg 370
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 180
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 1540
570
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 41 to 42
23
Strength to Weight: Bending, points 31
21
Thermal Diffusivity, mm2/s 2.8
3.8
Thermal Shock Resistance, points 37 to 39
21

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0
Boron (B), % 0.010 to 0.015
0
Carbon (C), % 0.030 to 0.070
0.2 to 0.35
Chromium (Cr), % 23 to 25
26 to 29
Cobalt (Co), % 19 to 21
61.7 to 67.3
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 1.0
0 to 3.0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 1.0 to 2.0
4.5 to 6.0
Nickel (Ni), % 43.6 to 52.2
2.0 to 3.0
Niobium (Nb), % 0.7 to 1.2
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0 to 0.0070
0
Tantalum (Ta), % 0 to 0.050
0
Titanium (Ti), % 2.8 to 3.2
0
Zirconium (Zr), % 0.030 to 0.070
0