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Nickel 625 vs. R31537 Cobalt

Nickel 625 belongs to the nickel alloys classification, while R31537 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 (6, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 33 to 34
14 to 23
Fatigue Strength, MPa 240 to 320
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
87
Tensile Strength: Ultimate (UTS), MPa 790 to 910
1000 to 1340
Tensile Strength: Yield (Proof), MPa 320 to 450
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Melting Completion (Liquidus), °C 1350
1360
Melting Onset (Solidus), °C 1290
1290
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 11
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.4
Embodied Carbon, kg CO2/kg material 14
8.1
Embodied Energy, MJ/kg 190
110
Embodied Water, L/kg 290
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 29
33 to 44
Strength to Weight: Bending, points 22 to 24
26 to 32
Thermal Diffusivity, mm2/s 2.9
3.4
Thermal Shock Resistance, points 22 to 25
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0 to 0.14
Chromium (Cr), % 20 to 23
26 to 30
Cobalt (Co), % 0 to 1.0
58.9 to 69
Iron (Fe), % 0 to 5.0
0 to 0.75
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 8.0 to 10
5.0 to 7.0
Nickel (Ni), % 58 to 68.9
0 to 1.0
Niobium (Nb), % 3.2 to 4.2
0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0 to 0.4
0

Comparable Variants