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R31538 Cobalt vs. Nickel 333

R31538 cobalt belongs to the cobalt alloys classification, while nickel 333 belongs to the nickel alloys. They have a modest 34% 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 R31538 cobalt and the bottom bar is nickel 333.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 13 to 23
34
Fatigue Strength, MPa 310 to 480
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
81
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
630
Tensile Strength: Yield (Proof), MPa 580 to 930
270

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1410
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
11
Thermal Expansion, µm/m-K 13
13

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
8.5
Embodied Carbon, kg CO2/kg material 8.1
8.5
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 530
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
170
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
180
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
21
Strength to Weight: Bending, points 27 to 32
19
Thermal Diffusivity, mm2/s 3.5
2.9
Thermal Shock Resistance, points 25 to 33
16

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.1
Chromium (Cr), % 26 to 30
24 to 27
Cobalt (Co), % 58.7 to 68.9
2.5 to 4.0
Iron (Fe), % 0 to 0.75
9.3 to 24.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 5.0 to 7.0
2.5 to 4.0
Nickel (Ni), % 0 to 1.0
44 to 48
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
2.5 to 4.0