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Nickel 625 vs. R30816 Cobalt

Nickel 625 belongs to the nickel alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have 51% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 33 to 34
23
Fatigue Strength, MPa 240 to 320
250
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 790 to 910
1020
Tensile Strength: Yield (Proof), MPa 320 to 450
460

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Melting Completion (Liquidus), °C 1350
1540
Melting Onset (Solidus), °C 1290
1460
Specific Heat Capacity, J/kg-K 440
420
Thermal Conductivity, W/m-K 11
13
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.1
Embodied Carbon, kg CO2/kg material 14
20
Embodied Energy, MJ/kg 190
320
Embodied Water, L/kg 290
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
190
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 26 to 29
31
Strength to Weight: Bending, points 22 to 24
25
Thermal Diffusivity, mm2/s 2.9
3.3
Thermal Shock Resistance, points 22 to 25
28

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.32 to 0.42
Chromium (Cr), % 20 to 23
19 to 21
Cobalt (Co), % 0 to 1.0
40 to 49.8
Iron (Fe), % 0 to 5.0
0 to 5.0
Manganese (Mn), % 0 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 8.0 to 10
3.5 to 4.5
Nickel (Ni), % 58 to 68.9
19 to 21
Niobium (Nb), % 3.2 to 4.2
3.5 to 4.5
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 0 to 0.4
0
Tungsten (W), % 0
3.5 to 4.5