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R31538 Cobalt vs. Grade CX2M Nickel

R31538 cobalt belongs to the cobalt alloys classification, while grade CX2M nickel belongs to the nickel alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 R31538 cobalt and the bottom bar is grade CX2M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
220
Elongation at Break, % 13 to 23
45
Fatigue Strength, MPa 310 to 480
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
84
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
550
Tensile Strength: Yield (Proof), MPa 580 to 930
310

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Melting Completion (Liquidus), °C 1360
1500
Melting Onset (Solidus), °C 1290
1450
Specific Heat Capacity, J/kg-K 450
430
Thermal Conductivity, W/m-K 13
10
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.7
Embodied Carbon, kg CO2/kg material 8.1
12
Embodied Energy, MJ/kg 110
160
Embodied Water, L/kg 530
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
210
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
220
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
18
Strength to Weight: Bending, points 27 to 32
17
Thermal Diffusivity, mm2/s 3.5
2.7
Thermal Shock Resistance, points 25 to 33
15

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.020
Chromium (Cr), % 26 to 30
22 to 24
Cobalt (Co), % 58.7 to 68.9
0
Iron (Fe), % 0 to 0.75
0 to 1.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
15 to 16.5
Nickel (Ni), % 0 to 1.0
56.4 to 63
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0
0 to 0.020