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Grade CX2MW Nickel vs. R31538 Cobalt

Grade CX2MW nickel belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt 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 (4, in this case) are not shown.

For each property being compared, the top bar is grade CX2MW nickel and the bottom bar is R31538 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 34
13 to 23
Fatigue Strength, MPa 260
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 84
86
Tensile Strength: Ultimate (UTS), MPa 620
1020 to 1360
Tensile Strength: Yield (Proof), MPa 350
580 to 930

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Melting Completion (Liquidus), °C 1550
1360
Melting Onset (Solidus), °C 1490
1290
Specific Heat Capacity, J/kg-K 430
450
Thermal Conductivity, W/m-K 10
13
Thermal Expansion, µm/m-K 12
13

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.4
Embodied Carbon, kg CO2/kg material 12
8.1
Embodied Energy, MJ/kg 170
110
Embodied Water, L/kg 290
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 290
750 to 1920
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 19
34 to 45
Strength to Weight: Bending, points 18
27 to 32
Thermal Diffusivity, mm2/s 2.7
3.5
Thermal Shock Resistance, points 17
25 to 33

Alloy Composition

Carbon (C), % 0 to 0.020
0.15 to 0.35
Chromium (Cr), % 20 to 22.5
26 to 30
Cobalt (Co), % 0
58.7 to 68.9
Iron (Fe), % 2.0 to 6.0
0 to 0.75
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 12.5 to 14.5
5.0 to 7.0
Nickel (Ni), % 51.3 to 63
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.025
0
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0 to 0.35
0