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R31538 Cobalt vs. Nickel 890

R31538 cobalt belongs to the cobalt alloys classification, while nickel 890 belongs to the nickel alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is nickel 890.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 13 to 23
39
Fatigue Strength, MPa 310 to 480
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
78
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
590
Tensile Strength: Yield (Proof), MPa 580 to 930
230

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Melting Completion (Liquidus), °C 1360
1390
Melting Onset (Solidus), °C 1290
1340
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.1
Embodied Carbon, kg CO2/kg material 8.1
8.2
Embodied Energy, MJ/kg 110
120
Embodied Water, L/kg 530
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
180
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 34 to 45
20
Strength to Weight: Bending, points 27 to 32
19
Thermal Shock Resistance, points 25 to 33
15

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.6
Carbon (C), % 0.15 to 0.35
0.060 to 0.14
Chromium (Cr), % 26 to 30
23.5 to 28.5
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 0.75
17.3 to 33.9
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 5.0 to 7.0
1.0 to 2.0
Nickel (Ni), % 0 to 1.0
40 to 45
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 0
0.1 to 0.6
Titanium (Ti), % 0
0.15 to 0.6