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Nickel 625 vs. R30605 Cobalt

Nickel 625 belongs to the nickel alloys classification, while R30605 cobalt belongs to the cobalt alloys. They have a modest 33% 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 nickel 625 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 33 to 34
34
Fatigue Strength, MPa 240 to 320
260 to 590
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
81
Tensile Strength: Ultimate (UTS), MPa 790 to 910
1130 to 1900
Tensile Strength: Yield (Proof), MPa 320 to 450
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Melting Completion (Liquidus), °C 1350
1410
Melting Onset (Solidus), °C 1290
1330
Specific Heat Capacity, J/kg-K 440
410
Thermal Conductivity, W/m-K 11
9.6
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.6
9.6
Embodied Carbon, kg CO2/kg material 14
9.8
Embodied Energy, MJ/kg 190
140
Embodied Water, L/kg 290
450

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 26 to 29
33 to 55
Strength to Weight: Bending, points 22 to 24
25 to 36
Thermal Diffusivity, mm2/s 2.9
2.5
Thermal Shock Resistance, points 22 to 25
31 to 52

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.050 to 0.15
Chromium (Cr), % 20 to 23
19 to 21
Cobalt (Co), % 0 to 1.0
46.4 to 57
Iron (Fe), % 0 to 5.0
0 to 3.0
Manganese (Mn), % 0 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 8.0 to 10
0
Nickel (Ni), % 58 to 68.9
9.0 to 11
Niobium (Nb), % 3.2 to 4.2
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0 to 0.4
0
Tungsten (W), % 0
14 to 16

Comparable Variants